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Executive Functions, Intellectual Capacity, and Psychiatric Disorders in Adults with Type 1 Chiari Malformation
Yavuz Yılmaz1, Mustafa Karademir2, Tülay Caygın3
1Department of Psychiatry, Cumhuriyet University Faculty of Medicine, Sivas, Turkey.
World Neurosurgery
|October 23, 2022
Summary
Adults with type 1 Chiari malformation (CM) show impaired executive functions (EFs) and a higher prevalence of psychiatric disorders compared to healthy individuals. This hindbrain anomaly affects cognitive abilities beyond motor control.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Medical Research
Background:
- The cerebellum, traditionally linked to motor functions, is increasingly recognized for its role in cognitive processes.
- Type 1 Chiari malformation (CM) is a hindbrain anomaly involving cerebellar tonsil displacement, potentially impacting neurological functions.
Purpose of the Study:
- To investigate executive functions (EFs), intellectual capacity, and psychiatric disorders in adults diagnosed with type 1 Chiari malformation.
- To compare cognitive and psychiatric profiles of CM patients against a healthy control group.
Main Methods:
- Sixty-two adults participated: 29 with CM and 33 controls.
- Executive functions assessed via Stroop test and number sequence learning test.
- Intellectual quotient (IQ) measured using Kent EGY and Porteus maze tests; psychiatric disorders evaluated using DSM-5-CV.
Main Results:
- The CM group exhibited significantly longer completion times on the Stroop test.
- Despite normal average scores, the CM group had lower mean IQ and standardized mini-mental state examination (SMMSE) scores.
- A higher rate of psychiatric comorbidities was observed in the CM group compared to controls.
Conclusions:
- Individuals with type 1 Chiari malformation demonstrate deficits in executive functions.
- Type 1 Chiari malformation is associated with an increased prevalence of psychiatric disorders.
- These findings highlight the cerebellum's broader role in cognition and mental health beyond motor control.
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