peduncle

(redirected from middle cerebellar peduncle)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

peduncle

1. the stalk of a plant bearing an inflorescence or solitary flower
2. Anatomy a stalklike structure, esp a large bundle of nerve fibres within the brain
3. Pathol a slender process of tissue by which a polyp or tumour is attached to the body
4. Biology another name for pedicel

peduncle

[′pē‚dəŋ·kəl]
(anatomy)
A band of white fibers joining different portions of the brain.
(botany)
A flower-bearing stalk.
A stalk supporting the fruiting body of certain thallophytes.
(invertebrate zoology)
The stalk supporting the whole or a large part of the body of certain crinoids, brachiopods, and barnacles.
References in periodicals archive ?
Background: Wallerian degeneration (WD) of bilateral middle cerebellar peduncles (MCPs) can occur following pontine infarction, but its characteristics have not yet been clarified because of the low incidence.
5 In MSA-P the degenerative changes predominantly affect the basal ganglia, particularly the putamen seen as hyperintense rim at the putaminal edge, atrophy and hypointensity of putaminal body on T2WI while in MSA-C changes predominantly affect infratentorial structures like pons and cerebellum, seen as atrophy and hyperintense signals in pons, cerebellum and middle cerebellar peduncles with pontine hyperintensity (hot cross bun sign) on axial image,4 which was seen in both of our patient's MRI.
The radiologist reported findings that are representative of multiple sclerosis, with involvement of the right cerebral peduncle, left middle cerebellar peduncle, medulla oblongata, anterior brainstem at the level of the pontomedullary sulcus in the region of the VI cranial nerve origins, and within the upper cervical cord.
The diagnosis of probable or possible MSA-C was established based on the second consensus criteria:[sup][24] (1) a sporadic, progressive, and adult (>30 years) onset disease characterized by a cerebellar syndrome (gait ataxia with cerebellar dysarthria, limb ataxia, or cerebellar oculomotor dysfunction), and (2) at least one of the additional features as follows: parkinsonism (bradykinesia and rigidity); atrophy of putamen, middle cerebellar peduncle, or pons on magnetic resonance imaging (MRI); hypometabolism on fluorodeoxyglucose-positron emission tomography (FDG-PET) in putamen; and presynaptic nigrostriatal dopaminergic denervation on single photon emission computed tomography (SPECT) or PET.
Similar lesions may also be found in the middle cerebellar peduncles and in the hemispheric white matter involving the centrum semi ovale and extending, in some cases, into the adjacent white matter.