Postnatal development of hypoglossal motoneurons that innervate the hyoglossus and styloglossus muscles in rat

Postnatal development of hyoglossus and styloglossus motoneurons was studied in this investigation of the hypoglossal nucleus. Our findings show separate and distinct locations for hyoglossus and styloglossus motoneurons within the retrusor (dorsal) subdivision of the hypoglossal nucleus for all age...

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Veröffentlicht in:The anatomical record. Part A, Discoveries in molecular, cellular, and evolutionary biology Discoveries in molecular, cellular, and evolutionary biology, 2005-07, Vol.285A (1), p.628-633
Hauptverfasser: Smith, J. Chadwick, Mcclung, J. Ross, Goldberg, Stephen J.
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container_title The anatomical record. Part A, Discoveries in molecular, cellular, and evolutionary biology
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creator Smith, J. Chadwick
Mcclung, J. Ross
Goldberg, Stephen J.
description Postnatal development of hyoglossus and styloglossus motoneurons was studied in this investigation of the hypoglossal nucleus. Our findings show separate and distinct locations for hyoglossus and styloglossus motoneurons within the retrusor (dorsal) subdivision of the hypoglossal nucleus for all age groups. Hyoglossus and styloglossus motoneuron cross‐sectional area reached their adult size at different times (by weeks 2 and 3, respectively). Cell roundness, as measured by form factor (measure of cell perimeter relative to its area), decreased with advancing postnatal age for both populations of motoneurons. Differences in the direction of the dendritic projection between hyoglossus and styloglossus motoneurons were found. Hyoglossus and styloglossus motoneuron development was compared to genioglossus motoneuron postnatal development. © 2005 Wiley‐Liss, Inc.
doi_str_mv 10.1002/ar.a.20204
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ispartof The anatomical record. Part A, Discoveries in molecular, cellular, and evolutionary biology, 2005-07, Vol.285A (1), p.628-633
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subjects Animals
Animals, Newborn
brainstem
Cholera Toxin - chemistry
Cholera Toxin - metabolism
Horseradish Peroxidase - chemistry
Horseradish Peroxidase - metabolism
Hypoglossal Nerve - cytology
Hypoglossal Nerve - growth & development
Hypoglossal Nerve - metabolism
hypoglossal nucleus
Indicators and Reagents - chemistry
Indicators and Reagents - metabolism
Motor Neurons - cytology
Motor Neurons - metabolism
Muscle, Skeletal - innervation
Rats
Rats, Sprague-Dawley
retrusor
tongue
Tongue - innervation
title Postnatal development of hypoglossal motoneurons that innervate the hyoglossus and styloglossus muscles in rat
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