ケンタッキー州の大学、生物学科、学部及び芸術科学大学のOfficeでサポート。

<ol>
	<li>Alexandrowicz, J. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Muscle+receptor+organs+in+the+abdomen+of+Homarus+vulgaris+and+Palinurus+vulgaris.">Muscle receptor organs in the abdomen of Homarus vulgaris and Palinurus vulgaris.</a> Q. J. Microsc. Sci. 92, 163-199 (1951).</li><li>Brown, H. M., Ottoson, D., Rydqvist, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Crayfish+stretch+receptor:+An+investigation+with+voltage-clamp+and+ion-sensitive+electrodes.">Crayfish stretch receptor: An investigation with voltage-clamp and ion-sensitive electrodes.</a> J. Physiol. 284, 155-179 (1978).</li><li>Burgess, P. R., Wei, J. Y., Clark, F. J., Simon, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Signaling+of+kinesthetic+information+by+peripheral+sensory+receptors.">Signaling of kinesthetic information by peripheral sensory receptors.</a> Ann. Rev. Neurosci. 5, 171-187 (1982).</li><li>Cooper, R. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Proprioceptive+neurons+of+chordotonal+organs+in+the+crab,+Cancer+magister+Dana+Decapoda,+Brachyura).">Proprioceptive neurons of chordotonal organs in the crab, Cancer magister Dana Decapoda, Brachyura).</a> Crustaceana. 81, 447-475 (2008).</li><li>Cooper, R. L., Govind, C. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Axon+composition+of+the+proprioceptive+PD+nerve+during+growth+and+regeneration+of+lobster+claws.">Axon composition of the proprioceptive PD nerve during growth and regeneration of lobster claws.</a> J. Exp. Zool. 260, 181-193 (1991).</li><li>Cooper, R. L., Ward, E., Braxton, R., Li, H., Warren, W. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+effects+of+serotonin+and+ecdysone+on+primary+sensory+neurons+in+crayfish.">The effects of serotonin and ecdysone on primary sensory neurons in crayfish.</a> Microscopy Res. Technique. 60, 336-345 (2003).</li><li>Donelan, J. M., McVea, D. A., Pearson, K. 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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+role+of+the+muscle+receptor+organ+in+the+control+of+the+abdominal+extension+in+the+crayfish+Cherax.">The role of the muscle receptor organ in the control of the abdominal extension in the crayfish Cherax.</a> J. Exp. Biol. 198, 2253-2259 (1995).</li><li>Mill, P. J., Lowe, D. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+fine+structure+of+the+PD+proprioceptor+of+Cancer+pagurus.I.+The+receptor+strand+and+the+movement+sensitive+cells.">The fine structure of the PD proprioceptor of Cancer pagurus.I. The receptor strand and the movement sensitive cells.</a> Proc. R. Soc. Lond. 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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+actions+of+proctolin,+octopamine+and+serotonin+on+the+crustacean+proprioceptors+show+species+and+neurone+specificity.">The actions of proctolin, octopamine and serotonin on the crustacean proprioceptors show species and neurone specificity.</a> J. Exp. Biol. 152, 485-504 (1990).</li><li>Patel, M., Fransson, P. A., Karlberg, M., Malmstrom, E. M., Magnusson, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Change+of+body+movement+coordination+during+cervical+proprioceptive+disturbances+with+increased+age.">Change of body movement coordination during cervical proprioceptive disturbances with increased age.</a> Gerontol. 56, 284-290 (2010).</li><li>Patullo, B., Faulkes, Z., Macmillan, D. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Muscle+receptor+organs+do+not+mediate+load+compensation+during+body+roll+and+defense+response+extensions+in+the+crayfish+Cherax+destructor.">Muscle receptor organs do not mediate load compensation during body roll and defense response extensions in the crayfish Cherax destructor.</a> J. Exp. Zool. 290, 783-790 (2001).</li><li>Purali, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Mechanisms of adaptation in a mechanoreceptor. 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Scand. 146, 67-77 (1992).</li><li>Rabin, E., Muratori, L., Svokos, K., Gordon, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tactile/proprioceptive+integration+during+arm+localization+is+intact+in+individuals+with+Parkinson's+disease.">Tactile/proprioceptive integration during arm localization is intact in individuals with Parkinson's disease.</a> Neurosci. Lett. 470, 38-42 (2010).</li><li>Rydqvist, B., Purali, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Potential-dependent+potassium+currents+in+the+rapidly+adapting+stretch+receptor+neuron+of+the+crayfish.">Potential-dependent potassium currents in the rapidly adapting stretch receptor neuron of the crayfish.</a> Acta Physiol. 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利害の衝突は宣言されません。

関連するムービーとテキストで提供される詳細情報は十分にその場でザリガニのMROの活動を記録するために重要なステップを提供している。私たちの報告書の一つの目標は、感覚生理学の基本概念を教えるための調査研究室を実行する学生で、この準備のための可能性の意識を高めることです。最小限の生理食塩水を浴びている間の準備は実行可能性に非常に堅牢です。 MROの筋肉のモータ制御は、識別が伝送における規制とシナプス可塑性の潜在的なだけでなく、興奮性と抑制性ニューロンの伝送の有効性は、調査のための空地のままされています（Elekesとフローリー、1987A、B、フローリーとフローリー、1955カフラー、1954年、カフラーとEyzaguirre、1955）。 この製剤は、優れた一次調査だけでなく、デモンストレーションではMROの生物学を理解するために動物内での実験条件の数だけでなく、運動の自然な範囲を調査するために使用することができます。 Edwards ら、1981;。Purali、1997; RydqvistとPurali、1991; Rydqvistこれらの感覚ニューロンの生物物理学的特性は、部分的に維持刺激（Brownら、1978と神経活動の適応の彼らの自然の中で解決されていますとSwerup、1991）。しかし、これらの感覚受容器とそれに関連する筋線維（Cooper ら、2003;パーストルとマクミラン、1990）上でわずか数レポートのアドレス神経調節。レポートは、体液中に存在することが知られている多くの化合物のほんの一部を扱う。変調器の多くの変調器とカクテルは、MROの複合体（筋肉や神経細胞）で検査されずに残っている。パーストルとマクミラン（1990）は、様々な甲殻類の種間MROsの活動に神経修飾物質5 - HTとオクトパミンを検討し、種の違いがあることを指摘しました。彼らは詳細にこれらの神経修飾物質の長期的な影響もMROの異なる静的な位置での活動への影響を調べていませんでした。 。ラビンら、2009;。マリノら準備のこのタイプの運動単位のabnormities（パテルら 、2009と人間のためのリハビリテーションと疾患管理において重要である神経処理の知覚と制御の基礎を理解するのに役立ちます。、2010）。アクセス可能な無脊椎動物の調製品で関節の動きを監視するための入力と発火パターンの様々な種類のロボット/プロテーゼ（マクミランとPatullo、2001）で使用することができます。いくつかの方法で有益であることができるこの準備のための答えを待っている多くの疑問が残っています。

<ol>
<li><a href="http://www.adinstruments.com/products/hardware/corporate/product/ML856/" target="_blank">PowerLab 26T (AD Instruments)</a> </li>
<li><a href="http://www.adinstruments.com/products/software/research/LabChart-Software/" target="_blank">LabChart 7 (ADI Instruments, Colorado Springs, CO, USA)</a> </li>
</ol>

muscle receptor organs in the crayfish abdomen: a student laboratory exercise in proprioception

この実験の主な目的は、動物のための固有感覚情報として関節の動きと位置の情報を伝える一次感覚ニューロンを示すことです。この実験の追加の目的は、解剖顕微鏡下で染色、解剖と神経細胞と感覚の構造の観察により、準備の解剖学を学ぶことです。これは、共同体の器官や染色技術から電気的活動を記録するための基本的な神経生理学的機器を使用して実行されます。ザリガニの筋肉の受容体の器官（MRO）のシステムは、電気生理学的記録のためのより容易にアクセス可能な比較モデルとしてのを助ける哺乳類の錘内筋紡錘、に似ています。さらに、これらは準備の間で識別可能な感覚ニューロンである。準備は、学生の実験演習のための従順である時間のための最小限の生理食塩水で実行可能です。 MROは、システムで変更することができますゲインとともに動きと静止位置の動的な信号の調節作用との統合のサイトに興味深い質問を促す神経調節の影響を受けやすくなります。

Watch this Scientific Journal Video about Muscle Receptor Organs in the Crayfish Abdomen: A Student Laboratory Exercise in Proprioception at JoVE.com

Muscle Receptor Organs in the Crayfish Abdomen: A Student Laboratory Exercise in Proprioception

この実験の主な目的は、一次感覚ニューロンは、動物のための固有感覚情報として関節の動きと位置の情報を伝える方法を理解することです。このレポートの追加の目的は、現在の解剖顕微鏡下でニューロンの解剖して参照することによって、準備の解剖学です。

ザリガニ腹部の筋肉の受容体の臓器：固有感覚の学生の研究室の演習

The primary purpose of this experiment is to demonstrate primary sensory neurons conveying information of joint movements and positions as proprioceptive ...

muscle-receptor-organs-crayfish-abdomen-student-laboratory-exercise

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Neuroscience

22.1K ビュー.  University of Kentucky. この実験の主な目的は、一次感覚ニューロンは、動物のための固有感覚情報として関節の動きと位置の情報を伝える方法を理解することです。このレポートの追加の目的は、現在の解剖顕微鏡下でニューロンの解剖して参照することによって、準備の解剖学です。

ビデオ: Muscle Receptor Organs in the Crayfish Abdomen: A Student Laboratory Exercise in Proprioception

Recording Behavioral Responses to Reflection in Crayfish

Social behavior depends on sensory input from the visual, mechanical and olfactory systems. One important issue concerns the relative roles of each sensory modality in guiding behavior. The role of visual inputs has been examined by isolating visual stimuli from mechanical and chemosensory stimuli. In some studies (Bruski &amp; Dunham, 1987: Delgado-Morales et al., 2004) visual inputs have been removed with blindfolds or low light intensity, and effects of remaining sensory modalities have been elucidated. An alternative approach is to study the effects of visual inputs in the absence of any appropriate mechanical and chemosensory cues. This approach aims to identify the exclusive role of visual inputs. 
We have used two methods to provide visual stimuli to crayfish without providing chemical and mechanical cues. In one method, crayfish are videotaped in an aquarium where half of the walls are covered in mirrors to provide a reflective environment, and the other half are covered in a non-reflective (matte finish) plastic. This gives the crayfish a choice between reflective and non-reflective environments. The reflective environment provides visual cues in the form of reflected images of the crayfish as it moves throughout half of the tank; these visual cues are missing from the non-reflective half of the tank. An alternative method is to videotape the behavior of crayfish in an aquarium separated by a smaller chamber at each end, with a crayfish in one small chamber providing visual cues and an inert object in the opposite small chamber providing visual input from a non-moving, non-crayfish source. 
Our published results indicate that responses of crayfish to the reflective environment depend on socialization and dominance rank. Socialized crayfish spent more time in the reflective environment and exhibited certain behaviors more frequently there than in the non-reflective environment; isolated crayfish showed no such differences. Crayfish that were housed in same-sex pairs developed a social rank of either dominant or subordinate. Responses to reflection differed between dominant and subordinate crayfish (May &amp; Mercier, 2006; May &amp; Mercier, 2007). Dominant crayfish spent more time on the reflective side, entered reflective corners more frequently and spent more time in reflective corners compared to the non-reflective side. Subordinate crayfish walked in reverse more often on the reflective side than on the non-reflective side. Preliminary data suggest similar effects from visual cues provided by a crayfish in a small adjoining chamber (May et al., 2008).

We have developed two methods for studying effects of visual cues on behavior in the absence of tactile and chemical cues. One method involves videotaping responses of crayfish to reflective walls in an aquarium; the other examines effects of visual inputs provided by a live crayfish behind a transparent partition.

ザリガニのリフレクションに行動反応の記録

Social behavior depends on sensory input from the visual, mechanical and olfactory systems.  One important issue concerns the relative roles of each ...

神経科学

A Procedure for Studying the Footshock-Induced Reinstatement of Cocaine Seeking in Laboratory Rats

The most insidious aspect of drug addiction is the high propensity for relapse. Animal models of relapse, known as reinstatement procedures, have been used extensively to study the neurobiology and phenomenology of relapse to drug use. Although procedural variations have emerged over the past several decades, the most conventional reinstatement procedures are based on the drug self-administration (SA) model. In this model, an animal is trained to perform an operant response to obtain drug. Subsequently, the behavior is extinguished by withholding response-contingent reinforcement. Reinstatement of drug seeking is then triggered by a discrete event, such as an injection of the training drug, re-exposure to drug-associated cues, or exposure to a stressor 1.
Reinstatement procedures were originally developed to study the ability of acute non-contingent exposure to the training drug to reinstate drug seeking in rats and monkeys 1, 2. Reinstatement procedures have since been modified to study the role of environmental stimuli, including drug-associated cues and exposure to various forms of stress, in relapse to drug seeking 1, 3, 4.
Over the past 15 years, a major focus of the reinstatement literature has been on the role of stress in drug relapse. One of the most commonly used forms of stress for studying this relationship is acute exposures to mild, intermittent, electric footshocks. The ability of footshock stress to induce reinstatement of drug seeking was originally demonstrated by Shaham and colleagues (1995) in rats with a history of intravenous heroin SA5. Subsequently, the effect was generalized to rats with histories of intravenous cocaine, methamphetamine, and nicotine SA, as well as oral ethanol SA 3, 6.
Although footshock-induced reinstatement of drug seeking can be achieved reliably and robustly, it is an effect that tends to be sensitive to certain parametrical variables. These include the arrangement of extinction and reinstatement test sessions, the intensity and duration of footshock stress, and the presence of drug-associated cues during extinction and testing for reinstatement. Here we present a protocol for footshock-induced reinstatement of cocaine seeking that we have used with consistent success to study the relationship between stress and cocaine seeking.

Animal models of relapse, known as reinstatement procedures, have been used extensively to study the role of stress in relapse to drug seeking. Here, we report on a method for inducing the reinstatement of cocaine seeking in laboratory rats via acute exposures to mild, intermittent electric footshock.

実験用ラットに求めてコカインのフットショック誘発性回復を勉強するための手順

The most insidious aspect of drug addiction is the high propensity for relapse.  Animal models of relapse, known as reinstatement procedures, have been ...

Physiological Recordings of High and Low Output NMJs on the Crayfish Leg Extensor Muscle

We explain in detail how to expose and conduct electrophysiological recordings of synaptic responses for high (phasic) and low (tonic) output motor neurons innervating the extensor muscle in the walking leg of a crayfish. Distinct differences are present in the physiology and morphology of the phasic and tonic nerve terminals. The tonic axon contains many more mitochondria, enabling it to take a vital stain more intensely than the phasic axon. The tonic terminals have varicosities, and the phasic terminal is filiform. The tonic terminals are low in synaptic efficacy but show dramatic facilitated responses. In contrast, the phasic terminals are high in quantal efficacy but show synaptic depression with high frequency stimulation. The quantal output is measured with a focal macropatch electrode placed directly over the visualized nerve terminals. Both phasic and tonic terminals innervate the same muscle fibers, which suggests that inherent differences in the neurons, rather than differential retrograde feedback from the muscle, account for the morphological and physiological differentiation.

This article demonstrates how to conduct electrophysiological recordings of synaptic responses on the extensor muscle in the walking leg of a crayfish and how the nerve terminals are visualized to show the gross morphological differences of high- and low-output nerve terminals.

ザリガニの脚の伸筋に高と低出力NMJsの生理的録音

We explain in detail how to expose and conduct electrophysiological recordings of synaptic responses for high (phasic) and low (tonic) output motor ...

Membrane Potentials, Synaptic Responses, Neuronal Circuitry, Neuromodulation and Muscle Histology Using the Crayfish: Student Laboratory Exercises

The purpose of this report is to help develop an understanding of the effects caused by ion gradients across a biological membrane. Two aspects that influence a cell's membrane potential and which we address in these experiments are: (1) Ion concentration of K+ on the outside of the membrane, and (2) the permeability of the membrane to specific ions. The crayfish abdominal extensor muscles are in groupings with some being tonic (slow) and others phasic (fast) in their biochemical and physiological phenotypes, as well as in their structure; the motor neurons that innervate these muscles are correspondingly different in functional characteristics. We use these muscles as well as the superficial, tonic abdominal flexor muscle to demonstrate properties in synaptic transmission. In addition, we introduce a sensory-CNS-motor neuron-muscle circuit to demonstrate the effect of cuticular sensory stimulation as well as the influence of neuromodulators on certain aspects of the circuit. With the techniques obtained in this exercise, one can begin to answer many questions remaining in other experimental preparations as well as in physiological applications related to medicine and health. We have demonstrated the usefulness of model invertebrate preparations to address fundamental questions pertinent to all animals.

The experiments demonstrate an easy approach for students to gain experience in examining muscle structure, synaptic responses, the effects of ion gradients and permeability on membrane potentials. Also, a sensory-CNS-motor-muscle circuit is presented to show a means to test effects of compounds on a neuronal circuit.

膜電位、シナプス応答、神経回路、ニューロモデュレーションとザリガニを使用して筋肉の組織学：学生研究室の演習

The purpose of this report is to help develop an understanding of the effects caused by ion gradients across a biological membrane. Two aspects that ...

Physiological Experimentation with the Crayfish Hindgut: A Student Laboratory Exercise

The purpose of the report is to describe dissection techniques for preparing the crayfish hindgut and to demonstrate how to make physiological recordings with a force transducer to monitor the strength of contraction. In addition, we demonstrate how to visually monitor peristaltic activity, which can be used as a bioassay for various peptides, biogenic amines and neurotransmitters. This preparation is amenable to student laboratories in physiology and for demonstrating pharmacological concepts to students. This preparation has been in use for over 100 years, and it still offers much as a model for investigating the generation and regulation of peristaltic rhythms and for describing the mechanisms underlying their modulation. The pharmacological assays and receptor sub-typing that were started over 50 years ago on the hindgut still contribute to research today. This robust preparation is well suited to training students in physiology and pharmacology.

In this report we demonstrate techniques that can be used to investigate the biology of the crayfish hindgut. We show how to dissect a crayfish abdomen and study the associated anatomy, physiology and modulation of activity. The peristaltic activity and strength of contractions are measured using a force transducer.

ザリガニ後腸との生理学的実験：学生実験室実習

The purpose of the report is to describe dissection techniques for preparing the crayfish hindgut and to demonstrate how to make physiological recordings ...

Imaging pHluorin-tagged Receptor Insertion to the Plasma Membrane in Primary Cultured Mouse Neurons

A better understanding of the mechanisms governing receptor trafficking between the plasma membrane (PM) and intracellular compartments requires an experimental approach with excellent spatial and temporal resolutions. Moreover, such an approach must also have the ability to distinguish receptors localized on the PM from those in intracellular compartments. Most importantly, detecting receptors in a single vesicle requires outstanding detection sensitivity, since each vesicle carries only a small number of receptors. Standard approaches for examining receptor trafficking include surface biotinylation followed by biochemical detection, which lacks both the necessary spatial and temporal resolutions; and fluorescence microscopy examination of immunolabeled surface receptors, which requires chemical fixation of cells and therefore lacks sufficient temporal resolution1-6 . To overcome these limitations, we and others have developed and employed a new strategy that enables visualization of the dynamic insertion of receptors into the PM with excellent spatial and temporal resolutions 7-17 . The approach includes tagging of a pH-sensitive GFP, the superecliptic pHluorin 18, to the N-terminal extracellular domain of the receptors. Superecliptic pHluorin has the unique property of being fluorescent at neutral pH and non-fluorescent at acidic pH (pH &lt; 6.0). Therefore, the tagged receptors are non-fluorescent when within the acidic lumen of intracellular trafficking vesicles or endosomal compartments, and they become readily visualized only when exposed to the extracellular neutral pH environment, on the outer surface of the PM. Our strategy consequently allows us to distinguish PM surface receptors from those within intracellular trafficking vesicles. To attain sufficient spatial and temporal resolutions, as well as the sensitivity required to study dynamic trafficking of receptors, we employed total internal reflection fluorescent microscopy (TIRFM), which enabled us to achieve the optimal spatial resolution of optical imaging (~170 nm), the temporal resolution of video-rate microscopy (30 frames/sec), and the sensitivity to detect fluorescence of a single GFP molecule. By imaging pHluorin-tagged receptors under TIRFM, we were able to directly visualize individual receptor insertion events into the PM in cultured neurons. This imaging approach can potentially be applied to any membrane protein with an extracellular domain that could be labeled with superecliptic pHluorin, and will allow dissection of the key detailed mechanisms governing insertion of different membrane proteins (receptors, ion channels, transporters, etc.) to the PM.

By tagging the extracellular domains of membrane receptors with superecliptic pHluorin, and by imaging these fusion receptors in cultured mouse neurons, we can directly visualize individual vesicular insertion events of the receptors to the plasma membrane. This technique will be instrumental in elucidating the molecular mechanisms governing receptor insertion to the plasma membrane.

イメージング初代培養マウス神経細胞における形質膜に受容体の挿入をpHluorinタグ付き

A better understanding of the mechanisms governing receptor trafficking between the plasma membrane (PM) and intracellular compartments requires an ...

Proprioception and Tension Receptors in Crab Limbs: Student Laboratory Exercises

The primary purpose of these procedures is to demonstrate for teaching and research purposes how to record the activity of living primary sensory neurons responsible for proprioception as they are detecting joint position and movement, and muscle tension. Electrical activity from crustacean proprioceptors and tension receptors is recorded by basic neurophysiological instrumentation, and a transducer is used to simultaneously measure force that is generated by stimulating a motor nerve. In addition, we demonstrate how to stain the neurons for a quick assessment of their anatomical arrangement or for permanent fixation. Staining reveals anatomical organization that is representative of chordotonal organs in most crustaceans. Comparing the tension nerve responses to the proprioceptive responses is an effective teaching tool in determining how these sensory neurons are defined functionally and how the anatomy is correlated to the function. Three staining techniques are presented allowing researchers and instructors to choose a method that is ideal for their laboratory.

Physiological and anatomical techniques are demonstrated to address function and structure for joint proprioceptors and muscle tension receptors in crustacean walking limbs.

カニ手足の固有感覚と緊張受容体：学生実験室の練習

The primary purpose of these procedures is to demonstrate for teaching and research purposes how to record the activity of living primary sensory neurons ...

Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans

Emerging evidence from a number of laboratories indicates that humans have the ability to identify fatty acids in the oral cavity, presumably via fatty acid receptors housed on taste cells. Previous research has shown that an individual&#39;s oral sensitivity to fatty acid, specifically oleic acid (C18:1) is associated with body mass index (BMI), dietary fat consumption, and the ability to identify fat in foods. We have developed a reliable and reproducible method to assess oral chemoreception of fatty acids, using a milk and C18:1 emulsion, together with an ascending forced choice triangle procedure. In parallel, a food matrix has been developed to assess an individual&#39;s ability to perceive fat, in addition to a simple method to assess fatty food liking. As an added measure tongue photography is used to assess papillae density, with higher density often being associated with increased taste sensitivity.

Oral chemoreception of fatty acids and the association with diet and fatty food preferences may enable the identification of mechanisms involved with the development of obesity and why dietary changes may be difficult for many individuals.

オーラル脂肪酸しきい値、脂肪知覚、脂肪食品嗜好、およびヒトにおける乳頭密度を測定

Emerging evidence from a number of laboratories indicates that humans have the ability to identify fatty acids in the oral cavity, presumably via fatty ...

Whole Mount Immunolabeling of Olfactory Receptor Neurons in the Drosophila Antenna

Odorant molecules bind to their target receptors in a precise and coordinated manner. Each receptor recognizes a specific signal and relays this information to the brain. As such, determining how olfactory information is transferred to the brain, modifying both perception and behavior, merits investigation. Interestingly, there is emerging evidence that cellular transduction and transcriptional factors are involved in the diversification of olfactory receptor neuron. Here we provide a robust whole mount immunological labeling method to assay in vivo olfactory receptor neuron organization. Using this method, we identified all olfactory receptor neurons with anti-ELAV antibody, a known pan-neural marker and Or49a-mCD8::GFP, an olfactory receptor neuron specifically expressed in Nba neuron using anti-GFP antibody.

Whole Mount Immunolabeling of Olfactory Receptor Neurons in the Drosophila Antenna

Herein we describe the process of whole mount immunostaining of Drosophila antennae, which enables us to better understand the molecular mechanisms involved in the diversification of olfactory receptor neurons (ORN)s.

における嗅覚受容ニューロンのホールマウント免疫標識<em&gt;ショウジョウバエ</em&gt;アンテナ

Odorant molecules bind to their target receptors in a precise and coordinated manner. Each receptor recognizes a specific signal and relays this ...

Adaptation of Microelectrode Array Technology for the Study of Anesthesia-induced Neurotoxicity in the Intact Piglet Brain

Every year, millions of children undergo anesthesia for a multitude of procedures. However, studies in both animals and humans have called into question the safety of anesthesia in children, implicating anesthetics as potentially toxic to the brain in development. To date, no studies have successfully elucidated the mechanism(s) by which anesthesia may be neurotoxic. Animal studies allow investigation of such mechanisms, and neonatal piglets represent an excellent model to study these effects due to their striking developmental similarities to the human brain.
This protocol adapts the use of enzyme-based microelectrode array (MEA) technology as a novel way to study the mechanism(s) of anesthesia-induced neurotoxicity (AIN). MEAs enable real-time monitoring of in vivo neurotransmitter activity and offer exceptional temporal and spatial resolution. It is hypothesized that anesthetic neurotoxicity is caused in part by glutamate dysregulation and MEAs offer a method to measure glutamate. The novel implementation of MEA technology in a piglet model presents a unique opportunity for the study of AIN.

This study explores the novel use of enzyme-based microelectrode array (MEA) technology to monitor in vivo neurotransmitter activity in piglets. The hypothesis was that glutamate dysregulation contributes to the mechanism of anesthetic neurotoxicity. Here, we present a protocol to adapt MEA technology to study the mechanism of anesthesia-induced neurotoxicity.

そのまま子豚脳内麻酔神経毒性の研究のための微小電極アレイ技術の適応

Every year, millions of children undergo anesthesia for a multitude of procedures. However, studies in both animals and humans have called into question ...