peduncle


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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 ?
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.
The minimum and maximum sizes of the peduncle and capitulum of these octolasmids are given in Table I.
Correlation between Plant height and other characters There was a positive and significant association of plant height with Flag leaf area, grain filling period, grain yield per meter, Spike length, spikelets per spikes, thousand grain weight, grain weight per spike, number of grains per spike, and peduncle length.
The following variables were evaluated: monthly production of gum, nut and peduncle production and peduncle's soluble solids content for the 2013 crop season, after the gum extraction.
1], SW, BIO and TKW so, the correlation coefficients are R=0,96 ***; R=0,88 ***; R=0,96 ***; R=0,82 ***; R=0,82*** respectively ; and a highly coefficients correlations was observed between the grain yield and the morphological parameters, which are leaf area (LA), peduncle length (PL) and speak length (SL), the correlation coefficients are R=0,71 ***; R=0,66 **; R=0,71 *** respectively (Table 3; Fig 3).
Abbreviations: SL = standard length, BD = body depth, CPL = caudal peduncle length, CPD = caudal peduncle depth, NA = not applicable, HL = head length, HW = head width, BIS = bony interorbital space, EL = eye length, SnL = snout length, DL = dorsal fin length, PDCD = postdorsal caudal distance, LDisk = disk length, RowC = Rows of papillae on disk C, RowA = Rows of papillae on disk A.
Caption: Figure 1: Axial (a) and coronal (b) noncontrast computed tomography (CT) of the head demonstrates hemorrhage in the region of the inferior right cerebellar peduncle, which appeared intraparenchymal, with extension into the fourth ventricle.
In dorsal view, the dorsal edge of the ilium is rounded dorsal to the pubic peduncle and progressively increases its width caudally to become a rugose, thick, flattened dorsal edge that faces dorsolaterally.
ocasoensis, which also has one); a dark, interrupted lateral stripe that is not in contact with the caudal peduncle spot (vs.
Plumose setae and aesthetascs are present on the peduncle, and simple setae on the antennular flagellum were noted, from stage I larvae to adults.