The Links Between Executive and Linguistic Processes and Their Lesional Determinants From a Verbal Fluency Task (FluLEx)

Centre Hospitalier Universitaire, Amiens

Status

Enrolling

Conditions

Cognitive Neurodegenerative

Stroke

Verbal Fluency Disorders

Treatments

Diagnostic Test: linguistic processes

Study type

Interventional

Funder types

Other

Identifiers

NCT05875103

PI2022_843_0150

Details and patient eligibility

About

Verbal fluency test require to produce as much words as possible in one or two minutes. This test is highly sensitive to main brain diseases and are therefore widely used in clinical routine for diagnostic purpose. The verbal fluency task requires several cognitive processes including executive and linguistic processes for which it is difficult to extract the origin of the deficit. For this reason, fluency tests are variably interpreted in terms of executive or language. The implementation of an experimental protocol exploring each of these processes separately and studying the links between the verbal fluency task and each of these processes should allow a better understanding of the origin of the verbal fluency deficit after brain injury and improve the identification of key brain structures.

Indeed, the lesion determinants of this task remain to be clarified despite remarkable advances due to the evolution of imaging techniques (voxel-based lesion-symptom mapping (VLSM); voxel-based morphometry (VBM)).

Furthermore, while the direct assessment of linguistic process, semantic memory, and processing speed is well defined, the examination of the executive component (i.e., strategic search process) remains unsettled and will be undertaken in this study.

This work will take advantage of data from previous multicenter work, validated methodologies for both analysis and interpretation of cognitive performance as well as anatomic-clinical correlations at the voxel level and will be performed in cognitive neurodegenerative and cerebrovascular disease.

Enrollment

302 estimated patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

For Cognitive cortical neurodegenerative diseases PATIENTS
informed consentPatients between 40 and 85 years old,
French native language,
Social Security affiliation,
Can read, write and count (up to 36) and knows the alphabet
Assessed in Amiens University Memory Clinic for:
Mild severity impairment (MMSE> 19) or major severity impairment related to:
AD according to Albert criteria and McKhann criteria
DCL according to McKeith criteria
FTLD according to Rascovsky criteria
CBD according to Armstrong's criteria
PSP according to Höglinger criteria
For Stroke PATIENTS
informed consent
Patients between 40 and 85 years old,
French native language,
Social Security affiliation,
Can read, write and count (up to 36) and knows the alphabet
Having suffered a stroke, hospitalized in neurology, visualized by imaging

Exclusion criteria

Mental retardation or guardianship
Other current or past brain condition affecting cognition, including:
Severe head trauma
Epilepsy prior to stroke still requiring previous treatment
Parkinson disease, multiple sclerosis
Brain tumor or brain radiation therapy
Current or past schizophrenia or psychosis
Active or past psychiatric impairments requiring a stay> 2 days in a specialized environment
Contra indication to MRI
Comorbidity with life expectancy <1 year
Comorbidity affecting cognition in particular:
Alcohol (> 3 glasses / day) or history of alcohol withdrawal syndrome
Opiate or cocaine addiction or opiate withdrawal syndrome
Renal failure (dialysis or creatinine clearance <30)
Hepatic failure (spontaneous INR> 1.5 or PT <60%)
Respiratory failure requiring oxygen therapy
Heart failure (orthopnea> 2 pillows)
Persistent vigilance disorder (NIHSS1a score ≤1)
Cancer with paraneoplastic syndrome
Treatment with gold salts, D Penicillamine or other treatment with cognitive effect
Patient under guardianship or curators or private under public law
Pregnant and / or lactating woman