Name: simultaneous recording of electroretinography and visual evoked potentials in anesthetized rats
Uploaded: 2016-07-01T14:00:00
Description: Watch this Scientific Journal Video about Simultaneous Recording of Electroretinography and Visual Evoked Potentials in Anesthetized Rats at JoVE.com

Funding for this project was provided by the National Health and Medical Research Council (NHMRC) 1046203 (BVB, AJV) and Melbourne Neuroscience Institute Fellowship (CTN).

全ての実験手順は、オーストラリアで国立保健医療研究評議会が定めた科学的な目的のための動物の管理と使用に関する実践のオーストラリアの規範に従って行われました。倫理クリアランスはメルボルン大学、科学学部、動物倫理委員会（承認番号0911322.1）から入手しました。 1.慢性VEP電極の着床前注：同時ERGおよびVEP信号は外科的にVEPを移植しなければならない動物は、少なく...

<ol>
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ERGおよびVEPはそれぞれ網膜と皮質からの視覚機能の客観的な尺度です。同時記録​​の利点は、全体の視覚経路のより包括的なビューが与えられるということです。具体的には、それらの同時評価から補足情報は例えば、視神経障害がプライマリ脳萎縮19と共存することができる、ERGはまだ明確なVEPは18症状重複する障害のために（視覚路に損傷部位の鮮明な描写を提?...

電図（ERG）と視覚誘発電位（VEP）の測定は、視覚経路の完全性の有用な定量的評価を提供します。 VEPは、同じ光のイベント、次の一次視覚野への網膜から視覚経路の対応する機能の完全性を測定しながら、ERGは、光刺激に対する網膜の電気的応答を測定します。この原稿は、一般的に使用される実験用モデル、ラットにおけるERGおよびVEP応答の記録と分析のためのプロトコルについて説明します。 ERGは、光のフラッシュに網膜の総電気​​的応答を定量化することにより、キー網膜細胞クラスの数の機能的完全性の指標を提供します。イオンフラックスの協調一連の光開始によって開始され、オフセット、眼の外側に配置された表面電極を用いて測定することができる電圧の検出可能な変化を生じます。得られた波形がseの組み合わせを表し、振幅、タイミングおよび周波数の異なる明確に定義されたコンポーネントのリース、。研究の実質的な本体は、これらのコンポーネントは、比較的、多くの脊椎動物の網膜を横切って部品を互いに分離することができる保存されていることを示しています。思慮深く刺激（フラッシュ刺激、背景、刺激間隔）の条件を選択し、分析するために合成波形の特定の機能を選択することによって1は網膜細胞1,2の特定のグループの測定値を返すのを確信することができます。これらの特性は、網膜機能の非侵襲的測定として有用性ひいてはERGの広範なアプリケーションの基礎となります。この原稿が正（すなわち、光受容体（PIII成分）、双極細胞（PII成分）と網膜神経節細胞、ERGを測定し、網膜の主要な細胞のクラスのいくつかについての情報を返すために、その機能を解析するための方法論に焦点を当てて暗順応閾値応答またはPSTR）。 3の領域V1に視神経、視索、視床（外側膝状核、LGN）と光学放射を介してシリアルに伝え。げっ歯類では、大多数-それぞれの目のX字形の4から視神経線維の（90〜95％）とは反対側の中脳を支配します。 ERGとは異なり、特定の細胞のクラスにVEPの異なるコンポーネントを帰するようまだできていない、どこにも視覚的な経路に沿って5こうして変更はVEP波形に影響を与える可能性があります。それにもかかわらず、VEPは、ビジュアル性能と視覚路の完全性の有用な非侵襲性の尺度です。 VEPは、ERGと組み合わせて使用される場合、視覚系（ すなわち、網膜/視覚経路）のより完全な評価を提供することができます。 ERGおよびVEP記録は、アプリに応じて、単独で又は組み合わせて実施することができますカチオン。この論文に記載の方法は、網膜と皮質視覚誘発両眼からの電気生理学や麻酔したラットにおける両半球の同時評価を可能にします。これは、より包括的に網膜機能および網膜機能の変化が視覚誘発皮質機能に持つことができる上流の効果を評価するための便利な方法です。

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Alligator clip</td>
			<td>generic brand</td>
			<td>HM3022</td>
			<td>Stainless steel 26 mm clip for connecting VEP screw electrodes to cables</td>
		</tr>
		<tr>
			<td>Bioamplifier</td>
			<td>ADInstruments</td>
			<td>ML 135</td>
			<td>For amplifying ERG and VEP signals</td>
		</tr>
		<tr>
			<td>Carboxymethylcellulose sodium 1.0%</td>
			<td>Allergan</td>
			<td>CAS 0009000-11-7</td>
			<td>Viscous fluid for improving signal quality of the active ERG electrode</td>
		</tr>
		<tr>
			<td>Carprofen 0.5%</td>
			<td>Pfizer Animal Health Group</td>
			<td>CAS 53716-49-7</td>
			<td>Proprietary name: Rimadyl injectable (50 mg/mL). For post-surgery analgesia, diluted to 0.5% (5 mg/mL) in normal saline</td>
		</tr>
		<tr>
			<td>Chlorhexadine 0.5%</td>
			<td>Orion Laboratories</td>
			<td>27411, 80085</td>
			<td>For disinfecting surgical instruments</td>
		</tr>
		<tr>
			<td>Circulating water bath</td>
			<td>Lauda-K&#246;nigshoffen</td>
			<td>MGW Lauda</td>
			<td>For maintaining body temperature of the anesthetized animal during surgery and electrophysiological recordings</td>
		</tr>
		<tr>
			<td>Dental amalgam</td>
			<td>DeguDent GmbH</td>
			<td>64020024</td>
			<td>For encasing the electrode-skull assembly to make it more robust</td>
		</tr>
		<tr>
			<td>Dental burr</td>
			<td>Storz Instruments, Bausch and Lomb</td>
			<td>#E0824A</td>
			<td>A miniature drill head of ~0.7mm diameter for making a small hole in the skull over each hemisphere to implant VEP screws</td>
		</tr>
		<tr>
			<td>Drill</td>
			<td>Bosch</td>
			<td>Dremel 300 series</td>
			<td>An automatic drill for trepanning</td>
		</tr>
		<tr>
			<td>Electrode lead</td>
			<td>Grass Telefactor&#160;</td>
			<td>F-E2-30</td>
			<td>Platinum cables for connecting silver wire electrodes to the amplifier</td>
		</tr>
		<tr>
			<td>Faraday Cage</td>
			<td>custom-made</td>
			<td></td>
			<td>Ensures light proof to maintain dark adaptation. Encloses the Ganzfeld setup to improve signal to noise ratio</td>
		</tr>
		<tr>
			<td>Gauze swabs</td>
			<td>Multigate Medical Products Pty Ltd</td>
			<td>57-100B</td>
			<td>For drying the surgical incision and exposed skull surface during surgery</td>
		</tr>
		<tr>
			<td>Ganzfeld integrating sphere</td>
			<td>Photometric Solutions International</td>
			<td></td>
			<td>Custom designed light stimulator: 36 mm diameter, 13 cm aperture size</td>
		</tr>
		<tr>
			<td>Velcro</td>
			<td>VELCRO Australia Pty Ltd</td>
			<td>VELCRO Brand Reusable Wrap</td>
			<td>Hook-and-loop fastener to secure the electrodes and the animal on the recording platform</td>
		</tr>
		<tr>
			<td>Isoflurane 99.9%</td>
			<td>Abbott Australasia Pty Ltd</td>
			<td>CAS 26675-46-7</td>
			<td>Proprietary Name: Isoflo(TM) Inhalation anaaesthetic. Pharmaceutical-grade inhalation anesthetic mixed with oxygen gas for VEP electrode implant surgery</td>
		</tr>
		<tr>
			<td>Ketamine&#160;</td>
			<td>Troy Laboratories</td>
			<td>Ilium Ketamil</td>
			<td>Proprietary name: Ketamil Injection, Brand: Ilium. Pharmaceutical-grade anesthetic for electrophysiological recording</td>
		</tr>
		<tr>
			<td>Luxeon LEDs</td>
			<td>Phillips Lighting Co.</td>
			<td></td>
			<td>For light stimulation twenty 5 watt and one 1 watt LEDs.</td>
		</tr>
		<tr>
			<td>Micromanipulator</td>
			<td>Harvard Apparatus</td>
			<td>BS4 50-2625</td>
			<td>Holds the ERG active electrode during recordings</td>
		</tr>
		<tr>
			<td>Needle electrode</td>
			<td>Grass Telefactor&#160;</td>
			<td>F-E2-30</td>
			<td>Subcutaneously inserted in the tail to serve as the ground electrode for both the ERG and VEP</td>
		</tr>
		<tr>
			<td>Phenylephrine 2.5% minims&#160;</td>
			<td>Bausch and Lomb</td>
			<td>CAS 61-76-7</td>
			<td>Instilled with Tropicamide to achieve maximal dilation for ERG recording</td>
		</tr>
		<tr>
			<td>Povidone iodine 10%</td>
			<td>Sanofi-Aventis</td>
			<td>CAS 25655-41-8</td>
			<td>Proprietory name: Betadine, Antiseptic to prepare the shaved skin for surgery 10%, 500 mL</td>
		</tr>
		<tr>
			<td>Powerlab data acquisition system</td>
			<td>ADInstruments</td>
			<td>ML 785</td>
			<td>Controls the LEDs</td>
		</tr>
		<tr>
			<td>Proxymetacaine 0.5%</td>
			<td>Alcon Laboratories&#160;</td>
			<td>CAS 5875-06-9</td>
			<td>For corneal anaesthesia during ERG recordings</td>
		</tr>
		<tr>
			<td>Saline solution</td>
			<td>Gelflex</td>
			<td></td>
			<td>Non-injectable, for electroplating silver wire electrodes</td>
		</tr>
		<tr>
			<td>Scope Software</td>
			<td>ADInstruments</td>
			<td>version 3.7.6</td>
			<td>Simultaneously triggers the stimulus via the Powerlab system and collects data</td>
		</tr>
		<tr>
			<td>Silver (fine round wire)</td>
			<td>A&#38;E metal</td>
			<td>0.3 mm</td>
			<td>Used to make active and inactive ERG electrodes, and the inactive VEP electrode</td>
		</tr>
		<tr>
			<td>Stainless streel screws&#160;</td>
			<td>MicroFasterners</td>
			<td></td>
			<td>0.7 mm shaft diameter, 3 mm in length to be implanted over the primary visual cortex and serve as the active VEP electrodes</td>
		</tr>
		<tr>
			<td>Stereotaxic frame</td>
			<td>David Kopf</td>
			<td>Model 900</td>
			<td>A small animal stereotaxic instrument for locating the primary visual cortices according to Paxinos &#38; Watson&#39;s 2007 rat brain atlas coordinates</td>
		</tr>
		<tr>
			<td>Surgical blade</td>
			<td>Swann-Morton Ltd.</td>
			<td>0206</td>
			<td>For incising the area of skin overlaying the primary visual cortex to implant the VEP electrodes</td>
		</tr>
		<tr>
			<td>Suture</td>
			<td>Shanghai Pudong Jinhuan Medical Products Co.,Ltd</td>
			<td></td>
			<td>3-0 silk braided suture non-absorbable, for skin retraction during VEP electrode implantation surgery</td>
		</tr>
		<tr>
			<td>Tobramycine eye ointment 0.3%</td>
			<td>Alcon Laboratories&#160;</td>
			<td>CAS 32986-56-4</td>
			<td>Proprietary name: Tobrex. Prophylactic antibiotic ointment applied around the skin wound after surgery</td>
		</tr>
		<tr>
			<td>Tropicamide 0.5%</td>
			<td>Alcon Laboratories&#160;</td>
			<td>CAS 1508-75-4</td>
			<td>Proprietary name: 0.5% Mydriacyl eye drop, Instilled to achieve mydriasis for ERG recording</td>
		</tr>
		<tr>
			<td>Xylazine</td>
			<td>Troy Laboratories</td>
			<td>Ilium Xylazil-100</td>
			<td>Pharmaceutical-grade anesthetic for electrophysiological recording</td>
		</tr>
		<tr>
			<td>Pipette tip&#160;</td>
			<td>Eppendorf Pty Ltd</td>
			<td>0030 073.169</td>
			<td>Eppendorf epTIPS 100 - 5000 mL, for custom-made electrodes</td>
		</tr>
		<tr>
			<td>Microsoft Office Excel</td>
			<td>Microsoft</td>
			<td>version 2010</td>
			<td>spreadsheet software for data analysis</td>
		</tr>
		<tr>
			<td>Lethabarb Euthanazia Injection</td>
			<td>Virbac (Australia) Pty Ltd</td>
			<td>LETHA450</td>
			<td>325 mg/mL pentobarbital sodium for rapid euthanazia</td>
		</tr>
	</tbody>
</table>

simultaneous recording of electroretinography and visual evoked potentials in anesthetized rats

The electroretinogram (ERG) and visual evoked potential (VEP) are commonly used to assess the integrity of the visual pathway. The ERG measures the electrical responses of the retina to light stimulation, while the VEP measures the corresponding functional integrity of the visual pathways from the retina to the primary visual cortex following the same light event. The ERG waveform can be broken down into components that reflect responses from different retinal neuronal and glial cell classes. The early components of the VEP waveform represent the integrity of the optic nerve and higher cortical centers. These recordings can be conducted in isolation or together, depending on the application. The methodology described in this paper allows simultaneous assessment of retinal and cortical visual evoked electrophysiology from both eyes and both hemispheres. This is a useful way to more comprehensively assess retinal function and the upstream effects that changes in retinal function can have on visual evoked cortical function.

ERG波（&gt; -1.38ログcd.sm -2）、B波（&gt; - 4.99ログcd.sm -2）のSTR（&lt; - 4.99ログcd.sm -2）とVEPに（&gt; - 0.52 cd.smを記録-2）（ 図1および3）を同時に記録しました。非常に薄暗い点滅で約220ミリ秒（ 図1および図2）では、正のSTR（PSTR）をフラッシュした後、約110ミリ秒を見られて、負のSTR（NSTR）。大B波とのERG、そのPI...

Watch this Scientific Journal Video about Simultaneous Recording of Electroretinography and Visual Evoked Potentials in Anesthetized Rats at JoVE.com

Simultaneous Recording of Electroretinography and Visual Evoked Potentials in Anesthetized Rats

This protocol describes simultaneous measurement of electroretinogram and visual evoked potentials in anesthetized rats.

麻酔ラットにおける電図および視覚誘発電位の同時記録

The electroretinogram (ERG) and visual evoked potential (VEP) are commonly used to assess the integrity of the visual pathway. The ERG measures the ...

Research

JoVE Journal

Neuroscience

Recording Large-scale Neuronal Ensembles with Silicon Probes in the Anesthetized Rat

麻酔ラットのシリコンプローブで大規模なニューロンアンサンブルの録音

Large scale electrophysiological recordings from neuronal ensembles offer the opportunity to investigate how the brain orchestrates the wide variety of ...

Simultaneous Whole-cell Recordings from Photoreceptors and Second-order Neurons in an Amphibian Retinal Slice Preparation

両生類網膜スライス標本における感光体と2次ニューロンからの同時ホールセル録音

One of the central tasks in retinal neuroscience  is to understand the circuitry of retinal neurons and how those connections are  responsible for shaping ...

Simultaneous Electrophysiological Recording and Calcium Imaging of Suprachiasmatic Nucleus Neurons

同時電気生理学的記録および視交叉上核ニューロンのカルシウムイメージング

Simultaneous electrophysiological and fluorescent imaging recording methods were used to study the role of changes of membrane potential or current in ...

Extracting Visual Evoked Potentials from EEG Data Recorded During fMRI-guided Transcranial Magnetic Stimulation

fMRIのガイド下経頭蓋磁気刺激中に記録された脳波データからの視覚誘発電位を抽出する

Transcranial Magnetic Stimulation (TMS) is an effective method for establishing a causal link between a cortical area and cognitive/neurophysiological ...

Simultaneous Electrophysiological Recording and Micro-injections of Inhibitory Agents in the Rodent Brain

同時電気生理学的記録およびげっ歯類の脳における阻害剤のマイクロ注射

Here we describe a method for the construction of a single-use &#8220;injectrode&#8221; using commercially accessible and affordable parts. A probing ...

Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System

Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System

同時<em&gt; ex vivoで</emによる二つの網膜の&gt;機能テスト<em&gt; in vivoで</em&gt;電図システム

An In vivo electroretinogram (ERG) signal is composed of several overlapping components originating from different retinal cell types, as well as noise ...

Visual Evoked Potential Recording in a Rat Model of Experimental Optic Nerve Demyelination

実験視神経の脱髄のラットモデルにおける視覚誘発電位の記録

The visual evoked potential (VEP) recording is widely used in clinical practice to assess the severity of optic neuritis in its acute phase, and to ...

Acute In Vivo Electrophysiological Recordings of Local Field Potentials and Multi-unit Activity from the Hyperdirect Pathway in Anesthetized Rats

Acute In Vivo Electrophysiological Recordings of Local Field Potentials and Multi-unit Activity from the Hyperdirect Pathway in Anesthetized Rats

急性<em&gt;インビボ</em&gt;麻酔ラットにおけるHyperdirect経路からの局所場ポテンシャルとマルチユニット活性の電気生理学的記録

Converging evidence shows that many neuropsychiatric diseases should be understood as disorders of large-scale neuronal networks. To better understand the ...

Chronic Transcranial Electrical Stimulation and Intracortical Recording in Rats

慢性的な経頭蓋電気刺激およびラットの皮質内の記録

Transcranial electrical stimulation (TES) is a powerful and relatively simple approach to diffusely influence brain activity either randomly or in a ...

Visual Evoked Potential Recordings in Mice Using a Dry Non-invasive Multi-channel Scalp EEG Sensor

誘発電位録画ドライの非侵襲的なマルチ チャネルを使用してマウスの頭皮脳波センサー

For scalp EEG research environments with laboratory mice, we designed a dry-type 16 channel EEG sensor which is non-invasive, deformable, and re-usable ...