Neurophysiological Correlates of Cognitive Tasks in Healthy Volunteers -WP3 P003

University Hospital, Lille20 enrolled

Overview

In the perspective to better evaluate the efficacy of new treatment strategies for Alzheimer disease (AD), it appears important to develop experimental paradigms to precisely measure cognitive endpoints/biomarkers that may be used in healthy volunteers as tools to validate drug efficacy profile. The use of Electroencephalography (EEG) may be, therefore, a good candidate. The purpose of the present study is to use EEG to more precisely explore cognitive processes in healthy subjects, with a particular interest in episodic and working memory functions that are usually altered in both AD and Mild Cognitive Impairment (MCI) as well as to better understand underlying neural mechanisms involved in these processes.

Study Type

INTERVENTIONAL

Allocation

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Alzheimer Disease ELECTROENCEPHALOGRAPHIC VARIANT PATTERN 1 (Disorder)

Interventions

Eligibility

Sex: MALEMin age: 18 YearsMax age: 30 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Right-handed * In good health on the basis of the medical interview (medical history, symptoms), the physical examination and vital signs * Non smoker and with no history of drug or alcohol abuse * Without chronic treatment * With normal hearing and normal vision including color (with correction) * French speaker and able to understand the test instructions * Has provided written informed consent * Able to read and understand the Information Form and comply with the protocol instructions and restrictions Exclusion Criteria: * Cognitive impairment (MoCA \< 26) * Cognitive complaint (MacNair Scale \> 15) * History of brain disease (severe brain trauma, stroke, cerebral tumor…) or current cerebral disease * Major medical or surgical history * Current chronic disease * Vascular or metabolic risk factor * History or current mental disease or addiction (MINI) * Family history of young onset dementia * Family history of chronic or severe neurological or mental disease (first degree relatives) * In the opinion of the investigator, is unlikely to comply with the study protocol or is unsuitable for any other reason * Participates to another clinical trial or is still being within a washout period of a previous clinical trial * Already exposed to cognitive tests used in this study.

Outcomes

Primary Outcomes

EEG spectral power during RVIP task as compared to resting state

The Rapid Visual Information Processing (RVIP®) is a test of sustained attention and has proved useful in many studies in which drugs are used to help develop a disease model. It is sensitive to dysfunction in the parietal and frontal lobe areas of the brain

Time frame: within 7 days after inclusion ( session1)

Secondary Outcomes

EEG spectral power during PRM task as compared to resting state

the Pattern Recognition Memory (PRM®) is a test assessing visual recognition memory, considered as a sensitive measure of medial temporal areas dysfunction. It is a useful tool for assessing patients with MCI and AD

Time frame: within 7 days after inclusion ( session1)

RVIP latency of responses

Time frame: within 7 days after inclusion ( session1) and within 7days after session 1 (=session2)

PRM number of errors

Time frame: within 7 days after inclusion ( session1) and within 7 days after session 1 (=session2)

PRM latency of responses

Time frame: within 7 days after inclusion (=session1) and within 7 days after session 1 (=session2)

difference between session 2 and session 1 EEG Spectral power during RVIP task

Time frame: at 7 days after session 1