peduncle

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Related to cerebellar peduncles: cerebellum, pons

peduncle

 [pe-dung´k'l]
1. a stemlike connecting part.
2. a collection of nerve fibers connecting between different regions in the central nervous system.
3. the stalk by which a nonsessile tumor is attached to normal tissue. adj., adj pedun´cular.
cerebellar p's three sets of paired bundles (superior, middle, and inferior) connecting the cerebellum to the midbrain, pons, and medulla oblongata, respectively.
cerebral peduncle the anterior half of the midbrain, divisible into a posterior part (tegmentum) and an anterior part (crus cerebri), which are separated by the substantia nigra.
inferior cerebellar peduncle a large bundle of nerve fibers serving to connect the medulla oblongata and spinal cord with the cerebellum (especially the archicerebellum and paleocerebellum); it courses along the lateral border of the fourth ventricle and turns dorsally into the cerebellum. Formerly called caudal cerebellar peduncle.
middle cerebellar peduncle a large bundle of projection fibers originating in the contralateral pontine nuclei and entering the cerebellum, conveying impulses from the cerebral cortex to the neocerebellum.
pineal peduncle habenula (def. 2).
superior cerebellar peduncle a large bundle of projection fibers arising chiefly in the dentate nucleus of each cerebellar hemisphere (neocerebellum) and ascending to decussate in the mesencephalon; its fibers end mostly in the red nucleus and thalamus. Spinocerebellar fibers to the paleocerebellum lie adjacent to each peduncle. Formerly called rostral cerebellar peduncle.
p's of thalamus the four two-way radiations of thalamocortical fibers that connect the dorsal thalamus with many parts of the cerebral cortex, which together form a major portion of the internal capsule and the corona radiata.

pe·dun·cle

(pe-dŭng'kĕl, pē'dŭng-kĕl),
1. neuroanatomy term loosely applied to a variety of stalklike connecting structures in the brain, composed either exclusively of white matter (for example, cerebellar peduncle) or of white and gray matter (for example, cerebral peduncle).
2. Synonym(s): pedicle (2)
[Mod. L. pedunculus, dim. of pes, foot]

peduncle

(pĭ-dŭng′kəl, pē′dŭng′kəl)
n.
1. Botany The stalk of an inflorescence or a stalk bearing a solitary flower in a one-flowered inflorescence.
2. Zoology A stalklike structure in invertebrate animals, usually serving as an attachment for a larger part or structure.
3. Anatomy A stalklike bundle of nerve fibers connecting different parts of the brain.
4. Medicine The stalklike base to which a polyp or tumor is attached.

pe·dun′cu·lar (pĭ-dŭng′kyə-lər) adj.

peduncle

A stalk, often referring to a sessile GI polyp

pe·dun·cle

(pĕ-dŭngk'ĕl)
1. neuroanatomy Term loosely applied to various stalklike connecting structures in the brain, composed either exclusively of white matter (e.g., cerebellar peduncle) or of white and gray matter (e.g., cerebral peduncle).
2. Synonym(s): pedicle (2) .
[Mod. L. pedunculus, dim. of pes, foot]

peduncle

A stalk-like bundle of fibres, especially nerve fibres that connects different parts of the central nervous system.

peduncle

the stalk of an inflorescence or a flower.
References in periodicals archive ?
Wallerian degeneration of the bilateral middle cerebellar peduncles. J Neurol Sci 2015;349:256-7.
Bilateral Wallerian degeneration of the middle cerebellar peduncles due to paramedian pontine infarction: MRI findings.
First patient with weakness of both legs, had hyperintensities in subcortical and periventricular white matter, internal capsule, pons and cerebellar peduncle. Second patient having right hemiparesis, had altered signal intensity at the cortical and subcortical areas of left frontal and parietal lobeplus significant atrophy of left cerebral hemisphere.
Cut sections through the brainstem and cerebellum disclosed the neoplasm that infiltrated the entire pons, extended into the midbrain, medulla, cerebellar peduncles, and caudal diencephalon (Figure 3).
Caption: Figure 3: Cut sections through the brainstem and cerebellum showingthe neoplasm infiltrating the entire pons, extending into the midbrain, medulla, cerebellar peduncles, and caudal diencephalon.
Pattern 7 atrophy (Cerebellar Peduncles) is seen in 1 case of atypical Parkinson's disease.
Signal changes in cerebellar peduncles (Pattern 5) are seen in 2 cases of Wilson's disease, 1 case of ataxia and atypical Parkinson's disease.
(1) Toxic exposure from heroin-induced leukoencephalopathy often involves bilateral symmetric damage to cerebellar white matter, posterior cerebral white matter; typically occipital lobe, posterior limb of internal capsule and cerebellar peduncles. (2)
Most of the parenchymal lesions are found in the infratentorial region (brain stem, cerebellum, and middle cerebellar peduncles) which were not present in our case [13].
There is severe hypogenesis of the cerebellar vermis, enlarged, horizontal superior cerebellar peduncles, a small mid brain in the anteroposterior direction, and a "batwing" configuration of the mid-superior fourth ventricle (Figures 1 and 2).
Dysgenesis of the pontomesencephalic isthmus results in the molar tooth appearance with widening of the interpeduncular cistern and abnormal thickening of the elevated superior cerebellar peduncles. This case demonstrates the clinical and imaging findings of this rare disorder.
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.