cerebral peduncle


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  • noun

Synonyms for cerebral peduncle

a bundle of myelinated neurons joining different parts of the brain

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Examples include complete 3rd nerve palsy accompanied by contralateral limb ataxia and tremor from involvement of the red nucleus (Claude syndrome) or by contralateral hemiparesis from involvement of descending motor (eg cortico-spinal) axons in the cerebral peduncle (Weber syndrome) or in combination with both types of motor disorder affecting the opposite limb(s) (Benedict syndrome).
The deficits are attributed to pressure on the contralateral cerebral peduncle, which leads to an indentation in the crus, called Kernohan's notch.
This was first described by Kernohan et al (1) in 1929 after an autopsy study revealed a notched cerebral peduncle from a contralateral herniation syndrome.
1) The 'roots' of the molar tooth are represented by thick, perpendicular, non-decussated superior cerebellar peduncles, while the 'body' of the molar tooth is formed by the cerebral peduncles of the brainstem with a deep interpeduncular fossa (Fig.
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