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Midbrain - Anatomy & Physiology (view source)
Revision as of 16:42, 6 August 2011
, 16:42, 6 August 2011→Substantia nigra
====Rostral Colliculi====
====Rostral Colliculi====
The rostral colliculi are placed closer together in comparison to the caudal. The rostral colliculi are also joined to the thalamus, but by the 'lateral geniculate bodies' rather than the medial. The rostral colliculi help to integrate the visual pathways and also are involved in somatic reflexes that are caused by visual cues. The rostral colliculi have also been suggested to be involved in spatial integration.
The rostral colliculi are placed closer together in comparison to the caudal. The rostral colliculi are also joined to the thalamus, but by the 'lateral geniculate bodies' rather than the medial. The rostral colliculi help to integrate the visual pathways and also are involved in somatic reflexes that are caused by visual cues. The rostral colliculi have also been suggested to be involved in spatial integration.
===''Substantia nigra''===
===Substantia nigra===
The ''substantia nigra'' is a prominent area of the mid brain and is identifiable on cross sections by it's darker pigmentation. This pigmentation is due to the gradual accumulation of pigmentation of neurons and is associated with basal nuclei within the tissue. The ''substantia nigra'' nuclei are involved in the control of voluntary movement.
The substantia nigra is a prominent area of the mid brain and is identifiable on cross sections by it's darker pigmentation. This pigmentation is due to the gradual accumulation of pigmentation of neurons and is associated with basal nuclei within the tissue. The ''substantia nigra'' nuclei are involved in the control of voluntary movement.
===Crura cerebri===
===Crura cerebri===
These are visible on the ventral surface of the mid brain and comprise of fibre tracts that are in passage between the telencephalon and the brain stem. The oculomotor nerves (see above) also emerge in this region of the mid brain, directly rostral to the pons.
These are visible on the ventral surface of the mid brain and comprise of fibre tracts that are in passage between the telencephalon and the brain stem. The oculomotor nerves (see above) also emerge in this region of the mid brain, directly rostral to the pons.