Cerebral peduncle

Cerebral peduncle
Brain: Cerebral peduncle
Gray689.png
Superficial dissection of brain-stem. Ventral view. ("Cerebral peduncle" visible in red at center-right.)
Cn3nucleus.png
Section through superior colliculus showing path of oculomotor nerve. (Crus cerebri labeled at lower left.)
Latin pedunculus cerebri
Gray's subject #188 800
NeuroNames hier-478
MeSH Cerebral+Peduncle
NeuroLex ID birnlex_1202

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. In as much as the peduncles are an anatomic landmark, for details regarding the function of this area interested readers are referred to the individual referenced articles. On a broad scale, though, this area contains many nerve tracts conveying motor information to and from the brain to the rest of the body.

Contents

Additional images

  • Scheme showing the connections of the several parts of the brain.

  • Superficial dissection of brain-stem. Lateral view.

  • Dissection of brain-stem. Lateral view.

  • Deep dissection of brain-stem. Lateral view.

  • Dissection showing the projection fibers of the cerebellum.

  • Median sagittal section of brain.

  • The left optic nerve and the optic tracts.

  • Upper part of medulla spinalis and hind- and mid-brains; posterior aspect, exposed in situ.

  • Human brainstem anterior view

See also

References

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

External links

v · d · eHuman brain: mesencephalon (midbrain) (TA A14.1.06, GA 9.800)
Tectum
(Dorsal)
Surface
White: Sensory/ascending
White: Motor/descending
Peduncle
(Ventral)
White: Sensory/ascending
lemnisci (Medial, Lateral) · Ascending MLF (Vestibulo-oculomotor fibers) · Spinothalamic tract · Anterior trigeminothalamic tract · Dentatothalamic tract
White: Motor/descending
Grey: other
Base
White: Motor/descending
Surface

M: CNS

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)

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