peduncle

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Related to peduncles: cerebellar peduncles, Cerebral peduncles

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

/pe·dun·cle/ (pĕ-dung´k'l) a stemlike connecting part, especially (a) a collection of nerve fibers coursing between different areas in the central nervous system, or (b) the stalk by which a nonsessile tumor is attached to normal tissue.pedun´cular
cerebellar peduncles  three sets of paired bundles of the hindbrain (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 an anterior part (crus cerebri) and a posterior part (tegmentum), which are separated by the substantia nigra.
pineal peduncle  habenula (2).
peduncles of thalamus  thalamic radiations.

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

[pədung′kəl]
Etymology: L, pes, foot
a stemlike connecting part, such as the pineal peduncle or a peduncle graft. peduncular, pedunculate, 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.

peduncle

a stemlike connecting part, especially: (1) a collection of nerve fibers coursing between different regions in the central nervous system, or (2) the stalk by which a nonsessile tumor is attached to normal tissue.

cerebellar p's
three pairs of thick, white fiber trunks that arise from the midbrain, pons and medulla and pass into the cerebellum.
cerebral peduncle
the ventral half of the midbrain, divisible into a dorsal part (tegmentum) and a ventral part (crus cerebri), which are separated by the substantia nigra.
peduncle disease
a disease of marine fish caused by the flexibacter Cytophaga psychrophila.
olfactory peduncle
caudal continuation of the olfactory bulb of the brain.
pineal peduncle
see habenula (2).
References in periodicals archive ?
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.
occurring singly or in groups of 2-3, reddish-golden to brownish-yellow tomentose, cylindrical to elongate conical-cylindrical, with round-acuminate apex of sterile sporophylls; peduncle 4-10 cm long, 0.
5 cm long; bracts 2-11 cm long, relatively slender; peduncles 1-2 cm long, erect.
It crosses the superior cerebellar artery close to the cerebral peduncles, passes the lateral edge of the clivus bone, and runs under the petroclinoidal ligament into the cavernous sinus between the double layer of dura and connective tissue at its lateral border, just below the oculomotor nerve and above the ophthalmic branch of the trigeminal (5th cranial) nerve.
They involve corpus callosum, internal capsule, cerebellar peduncles and juxtacortical areas.
Antennular peduncles stout, somewhat depressed dorsoventrally, not closely approximated, thus mesial face rounded; first segment with strong distolateral and small distomesial teeth; dorsal surface convex, groove separating stylocerite deep; stylocerite moderately slender, clearly separated from first segment, reaching or overreaching midlength of second segment, its lateral margin slightly convex; proximolateral tubercle prominent; second segment nearly as long as broad to slightly longer than broad, with small distomesial tooth.
Inside the stems, or peduncles, of the low-lignin lines, the lesions were shorter than those of the controls, suggesting bmr-6 and bmr-12's greater resistance.
In the first step, signals from the raphe neurons travel to the ventral tegmental area (VTA) located within the cerebral peduncles.
For studies on PN5, PN10, PN15, and PN21, brains were dissected into three regions: blunt cuts were made through the cerebellar peduncles, whereupon the cerebellum (including flocculi) was lifted from the underlying tissue.
Stage 18: The Future Corpus Striatum, the Inferior Cerebellar Peduncles, and the Dentate Nucleus.
3), a diagnosis of Joubert syndrome and related disorders (2) was made by the pathognomic finding of a 'molar tooth' sign at the ponto-mesencephalic junction, representing vermian aplasia and stretched superior cerebellar peduncles with a deep interpeduncular fossa.