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Descending pathways to the cutaneus trunci muscle motoneuronal cell group in the catPathways involved in the cutaneous trunci muscle (CTM) reflex in the cat were investigated. Experimental animals were injected with tritium-labeled L-leucine into their spinal cord, brain stem, or diencephalon and, after six weeks, perfused with 10-percent formalin. The brains and spinal cords were postfixed in formalin and were cut into transverse 25-micron-thick frozen sections for autoradiography. Results based on injections in the C1, C2, C6, and C8 segments suggest that propriospinal pathways to the CTM motor nucleus originating in the cervical cord do no exist, although these propriospinal projections are very strong to all other motoneuronal cell groups surrounding the CTM motor nucleus. The results also demonstrate presence of specific supraspinal projections to the CTM motor nucleus, originating in the contralateral nucleus retroambiguous and the ipsilateral dorsolateral pontine tegmentum.
Document ID
19900046267
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Holstege, Gert
(California, University San Francisco, United States)
Blok, Bertil F.
(Rotterdam, Universiteit Netherlands)
Date Acquired
August 14, 2013
Publication Date
December 1, 1989
Publication Information
Publication: Journal of Neurophysiology
Volume: 62
ISSN: 0022-3077
Subject Category
Life Sciences (General)
Accession Number
90A33322
Funding Number(s)
CONTRACT_GRANT: NCC2-491
Distribution Limits
Public
Copyright
Other

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