BASAL GANGLIA Prof. Ashraf Husain Basal Ganglia Structure. Functions. Metabolic features. Connections. Disorders.

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BASAL GANGLIA Prof. Ashraf Husain

Basal Ganglia Structure. Functions. Metabolic features. Connections. Disorders.

STRUCTURE Five nuclei : Caudate Nucleus Putamen Globus Pallidus – external & internal segments. Subthalamic Nucleus Substantia Nigra- pars compacta,reticulata.

Functions 1. Planning & programming (discharge before movement begins ). 2. Motor control of the final common pathway. 3. Muscle tone (lesion increases). 4. Cognitive functions (Frontal cortex) Lesions disrupt performance. 5. Speech, lesion of left caudate results in disturbed speech dysarthria.