The internal capsule is a mass of white fibers which lie between
the basal ganglia and thalamus. The posterior limb is commonly
injures due to hemorrhage or thrombosis in the lenticulo striate
artery. The lesion results in the following: 1- Hemi-plegia i.e.
paralysis of the muscles present in the opposite side of the
body due to damage of pyramidal and extra- pyramidal tracts
fibers. 2- Hemi-anesthesia i.e. loss of all sensations from the
opposite side of the body due to damage of sensory radiation. 3-
Hemi-anopia i.e. loss of vision in the opposite halves of visual
fields of both eyes. So, lesion in the right internal capsule
leads to loss of vision in the left halves of visual fields of
both eyes. It is due to damage of optic radiation. 4- Decrease
hearing;it is due to damage of auditory radiation. No deafness
because each ear is bilaterally represented in the cerebral
cortex. Incoming search terms: - damage of internal capsule -
internal capsule - internal capsule syndrome - internal capsule
visual loss