وأيد هذا العمل في جزء من المنحة الطبية بوسكه NSF ، منح IBN 0548543 - NSF ، منح بن 0919747 مارس من الدايمات مؤسسة المنح 1 - FY04 - 107 ، مارس من الدايمات مؤسسة المنح 1 - FY08 - 464 (لBLF). وقدم الدعم وMKK CGL بواسطة التكنولوجيا الحيوية NIH T32 المنح التدريبية GM008339 - 20 ، وكان مدعوما أيضا من قبل لجنة CGL نيوجيرسي على الحبل الشوكي زمالة أبحاث Predoctoral 08-2941 - SCR - E - 0.

<ol>
	<li>Elston, G. N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pyramidal+cells+of+the+frontal+lobe:+all+the+more+spinous+to+think+with.">Pyramidal cells of the frontal lobe: all the more spinous to think with.</a> J Neurosci. 20, (2000).</li><li>Koch, C., Segev, I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+role+of+single+neurons+in+information+processing.">The role of single neurons in information processing.</a> Nat Neurosci. , 1171-1177 (2000).</li><li>Poirazi, P., Mel, B. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Impact+of+active+dendrites+and+structural+plasticity+on+the+memory+capacity+of+neural+tissue.">Impact of active dendrites and structural plasticity on the memory capacity of neural tissue.</a> Neuron. 29, 779-796 (2001).</li><li>Schaefer, A. T., Larkum, M. E., Sakmann, B., Roth, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Coincidence+detection+in+pyramidal+neurons+is+tuned+by+their+dendritic+branching+pattern.">Coincidence detection in pyramidal neurons is tuned by their dendritic branching pattern.</a> J Neurophysiol. 89, 3143-3154 (2003).</li><li>Vetter, P., Roth, A., Hausser, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Propagation+of+action+potentials+in+dendrites+depends+on+dendritic+morphology.">Propagation of action potentials in dendrites depends on dendritic morphology.</a> J Neurophysiol. 85, 926-937 (2001).</li><li>Hausser, M., Spruston, N., Stuart, G. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Diversity+and+dynamics+of+dendritic+signaling.">Diversity and dynamics of dendritic signaling.</a> Science. 290, 739-744 (2000).</li><li>Brette, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Simulation+of+networks+of+spiking+neurons:+a+review+of+tools+and+strategies.">Simulation of networks of spiking neurons: a review of tools and strategies.</a> J Comput Neurosci. 23, 349-398 (2007).</li><li>Arendt, T., Zvegintseva, H. G., Leontovich, T. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dendritic+changes+in+the+basal+nucleus+of+Meynert+and+in+the+diagonal+band+nucleus+in+Alzheimer's+disease--a+quantitative+Golgi+investigation.">Dendritic changes in the basal nucleus of Meynert and in the diagonal band nucleus in Alzheimer's disease--a quantitative Golgi investigation.</a> Neuroscience. 19, 1265-1278 (1986).</li><li>Harrison, P. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+neuropathology+of+schizophrenia.+A+critical+review+of+the+data+and+their+interpretation.">The neuropathology of schizophrenia. A critical review of the data and their interpretation.</a> Brain. 122, 593-624 (1999).</li><li>Lewis, D. A., Glantz, L. A., Pierri, J. N., Sweet, R. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Altered+cortical+glutamate+neurotransmission+in+schizophrenia:+evidence+from+morphological+studies+of+pyramidal+neurons.">Altered cortical glutamate neurotransmission in schizophrenia: evidence from morphological studies of pyramidal neurons.</a> Ann N Y Acad Sci. 1003, 102-112 (2003).</li><li>Kaufmann, W. E., Moser, H. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dendritic+anomalies+in+disorders+associated+with+mental+retardation.">Dendritic anomalies in disorders associated with mental retardation.</a> Cereb Cortex. 10, 981-991 (2000).</li><li>Georges, P. C., Hadzimichalis, N. M., Sweet, E. S., Firestein, B. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+yin-yang+of+dendrite+morphology:+unity+of+actin+and+microtubules.">The yin-yang of dendrite morphology: unity of actin and microtubules.</a> Mol Neurobiol. 38, 270-284 (2008).</li><li>Firestein, B. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cypin:+a+cytosolic+regulator+of+PSD-95+postsynaptic+targeting.">Cypin: a cytosolic regulator of PSD-95 postsynaptic targeting.</a> Neuron. 24, 659-672 (1999).</li></ol>

الكتاب تعلن أي المصالح المتنافسة. كانت وكالات التمويل أي دور العلمية في تطوير موقد.

البرنامج هو برنامج مشعلة شبه الآلي لتحليل تغصن ومورفولوجيا محور عصبي. لأنه يزيد كثيرا من كفاءة ودقة التحليل Sholl على أداء تحليل يدويا. بالإضافة إلى ذلك ، يوفر برنامج مشعلة البيانات في كل خطوة من العملية ، مما يجعل من الممكن لتدقيق البيانات والتحقق من دقة التحليل. ولذلك...

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<td>NeuronJ plugin</td>
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<td><a href="http://www.imagescience.org/meijering/software/neuronj/">http://www.imagescience.org/meijering/software/neuronj/</a></td>
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<td>ImageJ software</td>
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<td><a href="http://rsbweb.nih.gov/ij/">http://rsbweb.nih.gov/ij/</a></td>
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<td>Bonfire program</td>
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<td><a href="http://lifesci.rutgers.edu/~firestein">http://lifesci.rutgers.edu/~firestein</a></td>
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<td>NeuronStudio</td>
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<td><a href="http://research.mssm.edu/cnic/tools-ns.html">http://research.mssm.edu/cnic/tools-ns.html</a></td>
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automated sholl analysis of digitized neuronal morphology at multiple scales

مورفولوجيا الخلايا العصبية تلعب دورا هاما في تحديد كيفية وظيفة الخلايا العصبية والتواصل 1-3. على وجه التحديد ، فإنه يؤثر على قدرة الخلايا العصبية لتلقي مدخلات من الخلايا الأخرى (2) ويسهم في انتشار إمكانات العمل 4،5. ومورفولوجية neurites يؤثر أيضا على كيفية معالجة المعلومات. تنوع morphologies تغصن تسهيل الإشارات المحلية والبعيدة المدى والسماح الخلايا العصبية الفردية أو مجموعات من الخلايا العصبية للقيام بالمهام المتخصصة داخل الشبكة العصبية 6،7. وقد لوحظت تغييرات في التشكل تغصن ، بما في ذلك تفتيت التشعبات والتغيرات في أنماط المتفرعة ، في عدد من الحالات المرضية ، بما في ذلك مرض الزهايمر 8 ، 9،10 الفصام والتخلف العقلي 11. القدرة على فهم كل من العوامل التي تشكل morphologies تغصن وتحديد التغيرات في morphologies تغصن أساسي في فهم وظيفة الجهاز العصبي وخلل وظيفي. ويتم تحليل كثير من الأحيان عن طريق تحليل مورفولوجيا Neurite Sholl وحساب عدد neurites وعدد من النصائح فرع. يتم تطبيق هذا التحليل عموما على التشعبات ، ولكن يمكن أيضا أن يطبق على المحاور. أداء هذا التحليل على حد سواء باليد تستغرق وقتا طويلا ويدخل حتما تقلب بسبب تحيز المجرب والتضارب. برنامج موقد هو نهج شبه الآلي لتحليل وتغصن محواري مورفولوجيا أن يبني المتاحة المصدر المفتوح أدوات التحليل الصرفي. برنامجنا تمكن من الكشف عن التغيرات المحلية في تغصن ومحوار المتفرعة عن طريق إجراء تحليل السلوكيات Sholl على الشجرة الفرعية للالتهاب الأعصاب. على سبيل المثال ، يتم تنفيذ Sholl التحليل على الخلايا العصبية على حد سواء ككل وكذلك على كل جزئية من العمليات (الابتدائي والثانوي والمحطة ، وجذر ، الخ) ويتأثر تغصن والزخرفة محور عصبي من جانب عدد من العوامل داخل وخارج الخلايا ، وكثير يتصرف محليا. وبالتالي ، فإن الناتج هو جذع التشكل نتيجة لعمليات محددة بناء على neurites محددة ، مما يجعل من الضروري إجراء تحليل الصرفي على نطاق أصغر من أجل مراعاة هذه الاختلافات المحلية 12. برنامج مشعلة يتطلب استخدام اثنين من أدوات التحليل مفتوح المصدر ، البرنامج المساعد لNeuronJ ImageJ وNeuronStudio. وتتبع الخلايا العصبية في ImageJ ، ويستخدم لتحديد NeuronStudio الربط بين neurites. الشعلة يحتوي على عدد من النصوص المكتوبة في العرف MATLAB (MathWorks) التي تستخدم لتحويل البيانات إلى الشكل المناسب لمزيد من التحليل ، والتحقق من المستخدم للأخطاء ، وإجراء تحليل Sholl في نهاية المطاف. أخيرا ، يتم تصدير البيانات إلى Excel للتحليل الإحصائي. ويبين الرسم البياني للبرنامج مشعلة في الشكل 1.

Watch this Scientific Journal Video about Automated Sholl Analysis of Digitized Neuronal Morphology at Multiple Scales at JoVE.com

Automated Sholl Analysis of Digitized Neuronal Morphology at Multiple Scales

قمنا بتطوير برنامج كمبيوتر لتحليل مورفولوجيا الخلايا العصبية. في تركيبة مع اثنين من القائمة أدوات التحليل مفتوحة المصدر ، برنامجنا ينفذ تحليل Sholl ويحدد عدد neurites ، نقطة تفرع ، ونصائح neurite. يتم إجراء التحاليل بحيث يمكن ملاحظة التغيرات المحلية في التشكل neurite.

الآلي Sholl تحليل الصرف متعلق بالخلايا العصبية رقمية على مستويات متعددة

Neuronal morphology plays a significant role in determining how neurons function and communicate1-3.  Specifically, it affects the ability of neurons to ...

automated-sholl-analysis-digitized-neuronal-morphology-at-multiple

Research

JoVE Journal

Neuroscience

33.3K Views.  Rutgers University. قمنا بتطوير برنامج كمبيوتر لتحليل مورفولوجيا الخلايا العصبية. في تركيبة مع اثنين من القائمة أدوات التحليل مفتوحة المصدر ، برنامجنا ينفذ تحليل Sholl ويحدد عدد neurites ، نقطة تفرع ، ونصائح neurite. يتم إجراء التحاليل بحيث يمكن ملاحظة التغيرات المحلية في التشكل neurite.

Video: Automated Sholl Analysis of Digitized Neuronal Morphology at Multiple Scales

Analysis of Dendritic Spine Morphology in Cultured CNS Neurons

Dendritic spines are the sites of the majority of excitatory connections within the brain, and form the post-synaptic 
compartment of synapses. These structures are rich in actin and have been shown to be highly dynamic. In response to classical Hebbian plasticity 
as well as neuromodulatory signals, dendritic spines can change shape and number, which is thought to be critical for the refinement of neural 
circuits and the processing and storage of information within the brain. Within dendritic spines, a complex network of proteins link extracellular 
signals with the actin cyctoskeleton allowing for control of dendritic spine morphology and number. Neuropathological studies have demonstrated that 
a number of disease states, ranging from schizophrenia to autism spectrum disorders, display abnormal dendritic spine morphology or numbers. 
Moreover, recent genetic studies have identified mutations in numerous genes that encode synaptic proteins, leading to suggestions that these 
proteins may contribute to aberrant spine plasticity that, in part, underlie the pathophysiology of these disorders. In order to study the potential 
role of these proteins in controlling dendritic spine morphologies/number, the use of cultured cortical neurons offers several advantages. Firstly, 
this system allows for high-resolution imaging of dendritic spines in fixed cells as well as time-lapse imaging of live cells. Secondly, this in 
vitro system allows for easy manipulation of protein function by expression of mutant proteins, knockdown by shRNA constructs, or pharmacological 
treatments. These techniques allow researchers to begin to dissect the role of disease-associated proteins and to predict how mutations of these 
proteins may function in vivo.

Numerous recent studies have identified mutations in synaptic proteins associated with brain pathologies. Primary cultured cortical neurons offer great flexibility in examining the effects of these disease-associated proteins on dendritic spine morphology and motility.

تحليل الصرف العمود الفقري شجيري الخلايا العصبية في الجهاز العصبي المركزي لؤلؤ

Dendritic spines are the sites of the majority of excitatory connections within the brain, and form the post-synaptic 
compartment of synapses. These ...

The Analysis of Purkinje Cell Dendritic Morphology in Organotypic Slice Cultures

Purkinje cells are an attractive model system for studying dendritic development, because they have an impressive dendritic tree which is strictly oriented in the sagittal plane and develops mostly in the postnatal period in small rodents 3. Furthermore, several antibodies are available which selectively and intensively label Purkinje cells including all processes, with anti-Calbindin D28K being the most widely used. For viewing of dendrites in living cells, mice expressing EGFP selectively in Purkinje cells 11 are available through Jackson labs. Organotypic cerebellar slice cultures cells allow easy experimental manipulation of Purkinje cell dendritic development because most of the dendritic expansion of the Purkinje cell dendritic tree is actually taking place during the culture period 4. We present here a short, reliable and easy protocol for viewing and analyzing the dendritic morphology of Purkinje cells grown in organotypic cerebellar slice cultures. For many purposes, a quantitative evaluation of the Purkinje cell dendritic tree is desirable. We focus here on two parameters, dendritic tree size and branch point numbers, which can be rapidly and easily determined from anti-calbindin stained cerebellar slice cultures. These two parameters yield a reliable and sensitive measure of changes of the Purkinje cell dendritic tree. Using the example of treatments with the protein kinase C (PKC) activator PMA and the metabotropic glutamate receptor 1 (mGluR1) we demonstrate how differences in the dendritic development are visualized and quantitatively assessed. The combination of the presence of an extensive dendritic tree, selective and intense immunostaining methods, organotypic slice cultures which cover the period of dendritic growth and a mouse model with Purkinje cell specific EGFP expression make Purkinje cells a powerful model system for revealing the mechanisms of dendritic development.

We present a protocol that permits to view and to quantitatively asses the morphology of the dendritic tree of individual Purkinje cells grown in organotypic cerebellar slice cultures. This protocol is intended to promote studies on the mechanisms of Purkinje cell dendritic development.

على تحليل من الخليوي بركينيي علم الصرف شجيرى في الثقافات شريحة عضوي النمط

Purkinje cells are an attractive model system for studying dendritic development, because they have an impressive dendritic tree which is strictly ...

Genetic Manipulation of Cerebellar Granule Neurons In Vitro and In Vivo to Study Neuronal Morphology and Migration

Developmental events in the brain including neuronal morphogenesis and migration are highly orchestrated processes. In vitro and in vivo analyses allow for an in-depth characterization to identify pathways involved in these events. Cerebellar granule neurons (CGNs) that are derived from the developing cerebellum are an ideal model system that allows for morphological analyses. Here, we describe a method of how to genetically manipulate CGNs and how to study axono- and dendritogenesis of individual neurons. With this method the effects of RNA interference, overexpression or small molecules can be compared to control neurons. In addition, the rodent cerebellar cortex is an easily accessible in vivo system owing to its predominant postnatal development. We also present an in vivo electroporation technique to genetically manipulate the developing cerebella and describe subsequent cerebellar analyses to assess neuronal morphology and migration.

Genetic Manipulation of Cerebellar Granule Neurons In Vitro and In Vivo to Study Neuronal Morphology and Migration

Neuronal morphogenesis and migration are crucial events underlying proper brain development. Here, we describe methods to genetically manipulate cultured cerebellar granule neurons and the developing cerebellum for the assessment of morphology and migratory characteristics of neurons.

التلاعب الجيني للمخيخي الحبيبة الخلايا العصبية<em&gt; في المختبر</em&gt; و<em&gt; في فيفو</em&gt; لدراسة مورفولوجيا الخلايا العصبية والهجرة

Developmental events in the brain including neuronal morphogenesis and migration are highly orchestrated processes. In vitro and in vivo analyses allow ...

Simultaneous Long-term Recordings at Two Neuronal Processing Stages in Behaving Honeybees

In both mammals and insects neuronal information is processed in different higher and lower order brain centers. These centers are coupled via convergent and divergent anatomical connections including feed forward and feedback wiring. Furthermore, information of the same origin is partially sent via parallel pathways to different and sometimes into the same brain areas. To understand the evolutionary benefits as well as the computational advantages of these wiring strategies and especially their temporal dependencies on each other, it is necessary to have simultaneous access to single neurons of different tracts or neuropiles in the same preparation at high temporal resolution. Here we concentrate on honeybees by demonstrating a unique extracellular long term access to record multi unit activity at two subsequent neuropiles1, the antennal lobe (AL), the first olfactory processing stage and the mushroom body (MB), a higher order integration center involved in learning and memory formation, or two parallel neuronal tracts2 connecting the AL with the MB.&#160;The latter was chosen as an example and will be described in full. In the supporting video the construction and permanent insertion of flexible multi&#160;channel wire electrodes is demonstrated. Pairwise differential amplification of the micro&#160;wire electrode channels drastically reduces the noise and verifies that the source of the signal is closely related to the position of the electrode tip. The mechanical flexibility of the used wire electrodes allows stable invasive long&#160;term recordings over many hours up to days, which is a clear advantage compared to conventional extra&#160;and intracellular in vivo recording techniques.

Simultaneous extracellular long term recordings from two different brain neuropiles or two different anatomical tracts were established in honeybees. These recordings allow the investigation of temporal aspects of neuronal processing across different brain areas at the single neuron as well as at the ensemble level in a behaving animal.

تسجيلات في وقت واحد على المدى الطويل في مرحلتين العصبية في معالجة يتصرفون نحل العسل

In both mammals and insects neuronal information is processed in different higher and lower order brain centers. These centers are coupled via convergent ...

Utilizing Combined Methodologies to Define the Role of Plasma Membrane Delivery During Axon Branching and Neuronal Morphogenesis

During neural development, growing axons extend to multiple synaptic partners by elaborating axonal branches. Axon branching is promoted by extracellular guidance cues like netrin-1 and results in dramatic increases to the surface area of the axonal plasma membrane. Netrin-1-dependent axon branching likely involves temporal and spatial control of plasma membrane expansion, the components of which are supplied through exocytic vesicle fusion. These fusion events are preceded by formation of SNARE complexes, comprising a v-SNARE, such as VAMP2 (vesicle-associated membrane protein 2), and plasma membrane t-SNAREs, syntaxin-1 and SNAP25 (synaptosomal-associated protein 25). Detailed herein isa multi-pronged approach used to examine the role of SNARE mediated exocytosis in axon branching. The strength of the combined approach is data acquisition at a range of spatial and temporal resolutions, spanning from the dynamics of single vesicle fusion events in individual neurons to SNARE complex formation and axon branching in populations of cultured neurons. This protocol takes advantage of established biochemical approaches to assay levels of endogenous SNARE complexes and Total Internal Reflection Fluorescence (TIRF) microscopy of cortical neurons expressing VAMP2 tagged with a pH-sensitive GFP (VAMP2-pHlourin) to identify netrin-1 dependent changes in exocytic activity in individual neurons. To elucidate the timing of netrin-1-dependent branching, time-lapse differential interference contrast (DIC) microscopy of single neurons over the order of hours is utilized. Fixed cell immunofluorescence paired with botulinum neurotoxins that cleave SNARE machinery and block exocytosis demonstrates that netrin-1 dependent axon branching requires SNARE-mediated exocytic activity.

Light microscopy techniques coupled with biochemical assays elucidate the involvement of SNARE-mediated exocytosis in netrin-dependent axon branching. This combination of techniques permits identification of molecular mechanisms controlling axon branching and cell shape change.

الاستفادة المشتركة منهجيات لتحديد دور البلازما غشاء تسليم خلال أكسون التشعب والعصبية التشكل

During neural development, growing axons extend to multiple synaptic partners by elaborating axonal branches. Axon branching is promoted by extracellular ...

Peering at Brain Polysomes with Atomic Force Microscopy

The translational machinery, i.e., the polysome or polyribosome, is one of the biggest and most complex cytoplasmic machineries in cells. Polysomes, formed by ribosomes, mRNAs, several proteins and non-coding RNAs, represent integrated platforms where translational controls take place. However, while the ribosome has been widely studied, the organization of polysomes is still lacking comprehensive understanding. Thus much effort is required in order to elucidate polysome organization and any novel mechanism of translational control that may be embedded. Atomic force microscopy (AFM) is a type of scanning probe microscopy that allows the acquisition of 3D images at nanoscale resolution. Compared to electron microscopy (EM) techniques, one of the main advantages of AFM is that it can acquire thousands of images both in air and in solution, enabling the sample to be maintained under near physiological conditions without any need for staining and fixing procedures. Here, a detailed protocol for the accurate purification of polysomes from mouse brain and their deposition on mica substrates is described. This protocol enables polysome imaging in air and liquid with AFM and their reconstruction as three-dimensional objects. Complementary to cryo-electron microscopy (cryo-EM), the proposed method can be conveniently used for systematically analyzing polysomes and studying their organization.

While ribosome structure has been extensively characterized, the organization of polysomes is still understudied. To overcome this lack of knowledge, we present here a detailed preparation protocol for accurate imaging of mammalian polysomes by atomic force microscopy (AFM) in air and liquid.

يطل في الدماغ Polysomes مع مجهر القوة الذرية

The translational machinery, i.e., the polysome or polyribosome, is one of the biggest and most complex cytoplasmic machineries in cells. Polysomes, ...

Measuring Progressive Neurological Disability in a Mouse Model of Multiple Sclerosis

After intracerebral infection with the Theiler's Murine Encephalomyelitis Virus (TMEV), susceptible SJL mice develop a chronic-progressive demyelinating disease, with clinical features similar to the progressive forms of multiple sclerosis (MS). The mice show progressive disability with loss of motor and sensory functions, which can be assessed with multiple apparatuses and protocols. Among them, the Rotarod performance test is a very common behavioral test, its advantage being that it provides objective measurements, but it is often used assuming that it is straightforward and simple. In contrast to visual scoring systems used in some models of MS, which are highly subjective, the Rotarod test generates an objective, measurable, continuous variable (i.e., length of time), allowing almost perfect inter-rater concordances. However, inter-laboratory reliability is only achieved if the various testing parameters are replicated. In this manuscript, recommendations of specific testing parameters, such as size, speed, and acceleration of the rod; amount of training given to the animals; and data processing, are presented for the Rotarod test.

An optimized testing protocol is presented in this paper for the Rotarod performance test, used for measuring progressive neurological disability in TMEV-infected mice.

قياس التقدمي العصبية الإعاقة في نموذج الفأر من مرض التصلب العصبي المتعدد

After intracerebral infection with the Theiler's Murine Encephalomyelitis Virus (TMEV), susceptible SJL mice develop a chronic-progressive demyelinating ...

Analyzing Dendritic Morphology in Columns and Layers

In many regions of the central nervous systems, such as the fly optic lobes and the vertebrate cortex, synaptic circuits are organized in layers and columns to facilitate brain wiring during development and information processing in developed animals. Postsynaptic neurons elaborate dendrites in type-specific patterns in specific layers to synapse with appropriate presynaptic terminals. The fly medulla neuropil is composed of 10 layers and about 750 columns; each column is innervated by dendrites of over 38 types of medulla neurons, which match with the axonal terminals of some 7 types of afferents in a type-specific fashion. This report details the procedures to image and analyze dendrites of medulla neurons. The workflow includes three sections: (i) the dual-view imaging section combines two confocal image stacks collected at orthogonal orientations into a high-resolution 3D image of dendrites; (ii) the dendrite tracing and registration section traces dendritic arbors in 3D and registers dendritic traces to the reference column array; (iii) the dendritic analysis section analyzes dendritic patterns with respect to columns and layers, including layer-specific termination and planar projection direction of dendritic arbors, and derives estimates of dendritic branching and termination frequencies. The protocols utilize custom plugins built on the open-source MIPAV (Medical Imaging Processing, Analysis, and Visualization) platform and custom toolboxes in the matrix laboratory language. Together, these protocols provide a complete workflow to analyze the dendritic routing of Drosophila medulla neurons in layers and columns, to identify cell types, and to determine defects in mutants.

Here, we show how to analyze dendritic routing of Drosophila medulla neurons in columns and layers. The workflow includes a dual-view imaging technique to improve the image quality and computational tools for tracing, registering dendritic arbors to the reference column array and for analyzing the dendritic structures in 3D space.

تحليل الجذعية الصرف في الأعمدة والطبقات

In many regions of the central nervous systems, such as the fly optic lobes and the vertebrate cortex, synaptic circuits are organized in layers and ...

Automated Gait Analysis in Mice with Chronic Constriction Injury

The von Frey test is a classical method that has been widely used to examine the sensory function of neuropathic pain animals. However, it has some disadvantages such as subjective data and the requirement of a skilled, experienced experimenter. To date, a variety of modifications have improved the von Frey method, but it still has a few limitations. Recent reports have suggested that gait analysis produces more accurate and objective data from the neuropathic animals. This protocol demonstrates how to perform the automated gait analysis to determine the degree of neuropathic pain in mice. After several days of acclimation, the mice were allowed to walk freely on the glass floor to illuminate footprints. Then, quantification of the footprints and gait were performed through video clips with automatic analysis of various walking parameters, such as area of paw print, swing time, angle of paw, etc.
The main purpose of this study is to describe the methodology of automated gait analysis and briefly compare it with data from the classical sensory test using von Frey filament.

The precise assessment of pain response in a neuropathic animal model is critical to investigate the pathophysiology of pain diseases and develop new analgesics. We present a sensitive and objective method to determine the sensory function of the rodent hind paw by an automated gait analysis system.

تحليل مشيه الآلي في الفئران مع الإصابات المزمنة انقباض

The von Frey test is a classical method that has been widely used to examine the sensory function of neuropathic pain animals. However, it has some ...

Quantitative Analysis of Neuronal Dendritic Arborization Complexity in Drosophila

Dendrites are the branched projections of a neuron, and dendritic morphology reflects synaptic organization during the development of the nervous system. Drosophila larval neuronal dendritic arborization (da) is an ideal model for studying morphogenesis of neural dendrites and gene function in the development of nervous system. There are four classes of da neurons. Class IV is the most complex with a branching pattern that covers almost the entire area of the larval body wall. We have previously characterized the effect of silencing the Drosophila ortholog of SOX5 on class IV neuronal dendritic arborization complexity (NDAC) using four parameters: the length of dendrites, the surface area of dendrite coverage, the total number of branches, and the branching structure. This protocol presents the workflow of NDAC quantitative analysis, consisting of larval dissection, confocal microscopy, and image analysis procedures using ImageJ software. Further insight into da neuronal development and its underlying mechanisms will improve the understanding of neuronal function and provide clues about the fundamental causes of neurological and neurodevelopmental disorders.

Quantitative Analysis of Neuronal Dendritic Arborization Complexity in Drosophila

This protocol focuses on quantitative analysis of neuronal dendritic arborization complexity (NDAC) in Drosophila, which can be used for studies of dendritic morphogenesis.

التحليل الكمي لتعقيد أربوريزاتيون الجذعية العصبية في المورفولوجية

Dendrites are the branched projections of a neuron, and dendritic morphology reflects synaptic organization during the development of the nervous system. ...