Basal ganglia
Basal ganglia
Corpus Striatum
Coronal section of Brain
Caudate nucleus
Head
Relation of body of Caudate Nucleus
Lentiform nucleus
Head
Lentiform nucleus
Coronal section of Brain
External capsule
Relation of lentiform nucleus
Connections of Corpus striatum
Cerebral cortex
Caudate nucleus
Putamen
Thalamus
Substantia Nigra
Subthalamic nucleus
Globus pallidus
Red nucleus
Amygdaloid body
Claustrum�Subthalamic nucleus�
External capsule
Disorders of basal ganglia
Parkinson’s Disease
Parkinson’s disease
Chorea
Athetosis
Shape “V”
Component of internal capsule�1. motor fibers��a. corticopontine fibers
b. Corticoneuclear and corticospinal fibers�occupy almost 2/3 of post. Limb of internal capsule
Pyramidal decussation
Extra pyramidal
Sensory�fibers
)
Applied anatomy
Internal Capsule
Corticospinal and corticobulbar fibers
arise from primary motor cortex.
Corticobulbar axons terminate in the
brainstem.
85% of corticospinal axons decussate
in the lower medulla.
15% form the anterior corticospinal
tract.
Internal capsule has anterior limb,
posterior limb and genu.