The posterior limb of internal capsule (or occipital part) is the portion of the internal capsule

Internal capsule

The internal capsule is an area of white matter in the brain that separates the caudate nucleus and the thalamus from the lenticular nucleus. The internal capsule contains both ascending and descending axons....

 posterior to the genu

Internal capsule

The internal capsule is an area of white matter in the brain that separates the caudate nucleus and the thalamus from the lenticular nucleus. The internal capsule contains both ascending and descending axons....

.

Anterior

The anterior two-thirds of the occipital

Occipital

The word occipital, in zoology, pertains to the occiput .Occipital is a descriptor for several areas of animal & human anatomy.*External occipital protuberance* Internal occipital crest* Greater occipital nerve...

 part of the internal capsule contains fibers of the corticospinal tract

Corticospinal tract

The corticospinal or pyramidal tract is a collection of axons that travel between the cerebral cortex of the brain and the spinal cord....

, which arise in the motor area of the cerebral cortex

Cerebral cortex

The cerebral cortex is a sheet of neural tissue that is outermost to the cerebrum of the mammalian brain. It plays a key role in memory, attention, perceptual awareness, thought, language, and consciousness. It is constituted of up to six horizontal layers, each of which has a different...

 and, passing downward through the middle three-fifths of the base of the cerebral peduncle

Cerebral peduncle

Mainly, the three common areas that give rise to the cerebral peduncles are the cortex, the spinal cord and the cerebellum. The cerebral peduncle, by most classifications, is everything in the mesencephalon except the tectum. The region includes the midbrain tegmentum, crus cerebri and pretectum...

, are continued into the pyramids of the medulla oblongata

Medulla oblongata

The medulla oblongata is the lower half of the brainstem. In discussions of neurology and similar contexts where no ambiguity will result, it is often referred to as simply the medulla...

.

Posterior

The posterior third of the occipital part contains:

• (1) sensory fibers, largely derived from the thalamus
  Thalamus
  The thalamus is a midline paired symmetrical structure within the brains of vertebrates, including humans. It is situated between the cerebral cortex and midbrain, both in terms of location and neurological connections...
  
  , though some may be continued upward from the medial lemniscus
  Medial lemniscus
  The medial lemniscus, also known as Reil's band or Reil's ribbon, is a pathway in the brainstem that carries sensory information from the gracile and cuneate nuclei to the thalamus.-Path:...
  
  ;
• (2) the fibers of optic radiation
  Optic radiation
  The optic radiation is a collection of axons from relay neurons in the lateral geniculate nucleus of the thalamus carrying visual information to the visual cortex along the calcarine fissure.There is one such tract on each side of the brain.-Parts:A distinctive...
  
  , from the lower visual centers to the cortex of the occipital lobe
  Occipital lobe
  The occipital lobe is the visual processing center of the mammalian brain containing most of the anatomical region of the visual cortex. The primary visual cortex is Brodmann area 17, commonly called V1...
  
  ;
• (3) acoustic fibers, from the lateral lemniscus
  Lateral lemniscus
  The lateral lemniscus is a tract of axons in the brainstem that carries information about sound from the cochlear nucleus to various brainstem nuclei and ultimately the contralateral inferior colliculus of the midbrain...
  
   to the temporal lobe
  Temporal lobe
  The temporal lobe is a region of the cerebral cortex that is located beneath the Sylvian fissure on both cerebral hemispheres of the mammalian brain....
  
  ; and
• (4) fibers which pass from the occipital and temporal lobes to the nuclei pontis.

External links

• http://www.indiana.edu/~pietsch/icdrawing250.jpg