| Project/Area Number |
01570025
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
神経解剖学
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| Research Institution | University of Tsukuba, Institute of Basic Medical Sciences |
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Principal Investigator |
OKADO Nobuo Univ. of Tsukuba, Inst. Basic Med. Sci., Associate Prof., 基礎医学系, 助教授 (50060140)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1990: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1989: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | dendrite / spinal cord / motoneuron / afferent / cholera to / labeling / clonrite / architecture / motoneuron / snivol cord / cholera toxin / SPINALCORD / MOTOR NEURON / CHOLERATOXIN / HORSERADISH PEROXIDASE / MUSCLE |
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| Research Abstract |
Dendroarchitecture of motoneurons innervating specific hindlimb muscles was studied in the chick spinal cord by the use of intramuscular injections of horseradish peroxidase conjugated with cholera toxin subunit B. Motoneuron pools (MNP) of the posterior iliotibial and femorotibial muscles were located at the dorsolateral part of the lateral motor column of the lumbosacral spinal segments (LS) 1-4 and 1-3, respectively. Although dendritic extensions of femorotibial MNP was fewer and shorter than that of the posterior iliotibial MNP, distribution pattern of dendrites of these two MNPs were quite similar. Dendritic profiles were equally distributed in the white and gray matters. The MNP of posterior iliotibial muscle have dendrites extending all the directions. A large number of dendrites penetrated in the white matter, and many of them reached to the pial surface of the lateral and ventral funiculi, Dendrites directing to the dorsomedialwards reached to the base of the dorsal horn. MNPs of both the iliofibular (LS4-7) and caudilioflexorius (LS6-8) had dendritic trees, which extended along both lateral and ventral border of the lateral motor column. From these observation we concluded that there are major differences in the distribution of dendrites of MNPs innervating different hind limb muscles of the chicken.
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