Study of Bipolar Disorders and Retinal Electrophysiological Markers

Summary

The BIMAR study aims to compare electrophysiological data measured with electroretinogram (ERG) and electroencephalogram (EEG) between a group of euthymic patients with bipolar disorder (BD) and a group of healthy controls subjects.

Secondarily, the investigators also want to:

* Compare combined electrophysiological measurements with ERG and EEG between the two groups.
* Identify relations between clinical, neuropsychological and circadian phenotypes in patients with BD and electrophysiological measurements measured with ERG and EEG.

The main hypothesis of the investigators is that differences exist in the ERG and EEG measurements between subjects with BD and healthy subjects. Those differences could be identified as candidate markers for BD which, if confirmed in later studies, could be used in current practice to guide the management of patients with BD.

Conditions

• Bipolar Disorder

Interventions

DEVICE

EEG and ERG measurements (Retinaute®, BioSerenity)

The Retinaute® is a portable medical device developed by BioSerenity, France, for performing flash and pattern ERG. It comes in the form of a virtual reality headset, which can be used in outpatient facilities. It is non-invasive and uses skin electrodes for the collection of parameters. ERG signals will be supplemented with 4 EEG channels, via cup electrodes applied to the skull and allowing the concomitant performance of an EEG.

DEVICE

Actigraphy (Motion Watch 8®, CamNtech)

Actigraphy is an ecological and non-invasive method allowing a reliable characterization of the sleep/wake cycle. It is a portable system for continuously measuring the motor activity of an individual and appreciating the alternation of activity periods (wakefulness) and rest periods (sleep). An actigraph (MotionWatch8®, CamNtech) looks like a wristwatch that will be worn continuously, by convention on the wrist of the non-dominant hand, over periods ranging from several days to several weeks (here 21 days). Actigraphy does not present a known risk.

BEHAVIORAL

Neuropsychological assessments

The purpose of this assessment is to establish a cognitive profile for each participant. It uses a series of tests widely described in the literature and commonly used today.

DEVICE

Optical Coherence Tomography (OCT)

The Spectral Domain Optical Coherence Tomography (SD-OCT) is a modern ocular imaging process using infrared radiation and allowing to obtain in a few seconds, and in a non-invasive way, images in section of the eye. The OCT-Angiography (OCT-A) module increments on the OCT. It can detect the movement of the blood elements from sequential SD-OCT slices taken at the same location of the retina and obtain a map of the retinal and choroidal vessels, without injection of fluorescent dye. The device used for both exams will be the OCT spectral RS 3000 Advance 2 + Angioscan (NIDEK, Gamagori, Japan). SD-OCT and OCT-A examinations are fast, painless, non-contact and last less than a minute. There is no particular risk.

Sponsors & Collaborators

• BioSerenity

  collaborator INDUSTRY

• Centre Psychothérapique de Nancy

  lead OTHER

Principal Investigators

• Thomas SCHWITZER, MD, PhD · Centre Psychothérapique de Nancy

Study Design

Allocation

NON_RANDOMIZED

Purpose

DIAGNOSTIC

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2022-01-18

Primary Completion

2023-08-08

Completion

2023-08-08

Countries

• France

Study Locations