A physiological and morphological study of premotor interneurones in the cutaneous reflex pathways in cats.
Implantation of an HRP-pellet into motor nuclei at the T1 segment resulted in retrograde labelling of laminae V-VII neurones densely at C6-C8 in cats. Electrophysiological experiments showed the presence of neurones in this region that received inputs from skin afferents and cortico- and rubrospinal tracts, sent axons descending in the lateral funiculus, and distributed in the motor nucleus at T1. Termination in T1 motor nuclei was also verified by intra-axonal staining with HRP. The input and output properties of these neurones indicated that they can be premotor neurones of skin reflex pathways to T1 motoneurones.
Hongo
T
T
Department of Neurophysiology, Faculty of Medicine, University of Tokyo, Japan.
Kitazawa
S
S
Ohki
Y
Y
Sasaki
M
M
Xi
M C
MC
D000818:Animals; D002415:Cats; D005552:Forelimb / Q000294:innervation* / Q000502:physiology; D006735:Horseradish Peroxidase; D007395:Interneurons / Q000502:physiology*; D009046:Motor Neurons / Q000502:physiology*; D012018:Reflex / Q000502:physiology*; D012867:Skin / Q000294:innervation*; D012879:Skin Physiological Phenomena; D013116:Spinal Cord / Q000166:cytology / Q000502:physiology*
D006735:Horseradish Peroxidase