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Cerebral peduncle

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Brain: Cerebral peduncle
Gray689
Superficial dissection of brain-stem. Ventral view. ("Cerebral peduncle" visible in red at center-right.)
Cn3nucleus
Section through superior colliculus showing path of oculomotor nerve. (Crus cerebri labeled at lower left.)
Latin pedunculus cerebri
Gray's subject #188 800
Part of
Components
Artery Vein =
Vein {{{Vein}}}
BrainInfo/UW hier-478
MeSH A08.186.211.132.659

Mainly, the three common areas that give rise to the cerebral peduncles are the cortex, the spinal cord and the cerebellum.[1] The cerebral peduncle, by most classifications, is everything in the mesencephalon except the tectum.[citation needed] The region includes the midbrain tegmentum, crus cerebri and pretectum. By this definition, the cerebral peduncles are also known as the basis pedunculi, while the large ventral bundle of efferent fibers is referred to as the crus cerebri or the pes pedunculi. There are numerous nerve tracts located within this section of the brainstem. Of note, in the cerebral peduncular loop fibers from motor areas of the brain project to the cerebral peduncle and then project to various thalamic nuclei.

Important fibers running through the cerebral peduncles include the corticospinal tract and the corticobulbar tract, among others. This area contains many nerve tracts conveying motor information to and from the brain to the rest of the body.

Additional imagesEdit

See alsoEdit

ReferencesEdit

  1. Saladin, Kenneth (2010), Anatomy & Physiology The Unity of Form and Function, New York, NY: McGraw-Hill Companies, Inc. 

External linksEdit


Mesencephalon (midbrain)

cerebral peduncle: midbrain tegmentum (periaqueductal gray, ventral tegmentum, nucleus raphe dorsalis), pretectum, substantia nigra, red nucleus, pedunculopontine nucleus, medial longitudinal fasciculus, medial lemniscus, rubrospinal tract, lateral lemniscus

tectum: corpora quadrigemina, inferior colliculi, superior colliculi

cerebral aqueduct: oculomotor nucleus, trochlear nucleus, Edinger-Westphal nucleus


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