Recording Horizontal Saccade Performances Accurately in Neurological Patients Using Electro-oculogram

Yasuo Terao; Hideki Fukuda; Yusuke Sugiyama; Satomi Inomata-Terada; Shin-ichi Tokushige; Masashi Hamada; Yoshikazu Ugawa

doi:10.3791/56934

Recording Horizontal Saccade Performances Accurately in Neurological Patients Using Electro-oculo...

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Recording Horizontal Saccade Performances Accurately in Neurological Patients Using Electro-oculogram

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06:12 min

March 13, 2018

DOI: 10.3791/56934-v

Yasuo Terao¹, Hideki Fukuda², Yusuke Sugiyama³, Satomi Inomata-Terada¹, Shin-ichi Tokushige⁴, Masashi Hamada³, Yoshikazu Ugawa⁵

¹Department of Cell Physiology,Kyorin University, ²Segawa Memorial Neurological Clinic for Children, ³Department of Neurology,University of Tokyo, ⁴Department of Neurology,Kyorin University, ⁵Department of Neurology,Fukushima Medical University

Overview

This article presents a method for accurately recording horizontal eye movements in neurological patients using electro-oculogram. The technique involves the use of a cup Ag-AgCl electrode and emphasizes the importance of proper electrode placement and light adaptation.

Key Study Components

Area of Science

Neuroscience
Oculomotor research
Neurology

Background

Understanding saccade performance in neurological disorders.
Investigating the pathophysiology of eye movement abnormalities.
Providing diagnostic insights for neurological conditions.
Noninvasive measurement techniques for eye movements.

Purpose of Study

To observe saccade performance abnormalities in neurological patients.
To elucidate the underlying pathophysiology of these disorders.
To enhance diagnostic capabilities in clinical settings.

Methods Used

Use of a cup Ag-AgCl electrode for recording.
Subject seated in a low-illumination environment.
Black concave dome-shaped screen with embedded LEDs for fixation.
Calibration and light adaptation procedures prior to measurement.

Main Results

Stable noninvasive recording of eye movements achieved.
Method applicable to a wide range of neurological patients.
Insights gained into the diagnosis of neurological disorders.
Demonstration of the procedure by experts in the field.

Conclusions

The method provides a reliable approach for assessing eye movement abnormalities.
It contributes valuable information for understanding neurological disorders.
Future applications may enhance diagnostic processes in clinical neurology.

Frequently Asked Questions

What is the main goal of the study?

The main goal is to observe saccade performance abnormalities in neurological patients.

How is the eye movement recorded?

Eye movements are recorded using a cup Ag-AgCl electrode in a controlled environment.

Who demonstrates the procedure?

Dr. Hideki Fukuda and Dr. Yuseke Sugiyama demonstrate the procedure.

What are the key components of the setup?

The setup includes a low-illumination room and a black concave dome-shaped screen with LEDs.

Why is light adaptation important?

Light adaptation is crucial for ensuring stable and accurate measurements.

What advantages does this method offer?

It allows for stable, noninvasive recording of eye movements in a short time.

The article describes a practical method for recording horizontal eye movements with high accuracy by electro-oculogram in neurological patients, using a cup Ag-AgCl electrode with a wide plastic fringe. Stable measurement requires proper selection and fixation of electrodes, taking sufficient time for light adaptation to occur, and re-calibration as needed.

The overall goal of the present oculogram is to observe the abnormality of saccade performance in patients especially in those with neurological disorders and to look at the pathophysiology underlying the disorder providing useful information about the diagnosis. This method can help answer key questions in the field such as diagnosis of patients with neurological disorders and to elucidate the pathophysiology underlying the disease. The main advantage of this technique is that it allows stable recording of eye movements noninvasively in a relatively short time and is widely applicable to neurological patients.

Demonstrating the procedure will be Dr.Hideki Fukuda, an oculomotor researcher at Segawa Neurologic Clinic for Children and Dr.Yuseke Sugiyama, a graduate student from the Department of Neurology, the University of Tokyo. Begin by escorting the subject into a room with low ambient illumination. Have the subject sit in front of a black concave dome-shaped screen measuring 90 centimeters in diameter that contains Light-Emitting Diodes, LEDs, embedded in pinholes which serve as the fixation points and saccade targets used for the oculomotor paradigms.

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