[Distribution of the fibers of the descending respiratory pathway in the phrenic nucleus of the cat].
A distribution of degenerated fibers in contralateral phrenic nucleus of cats with chronic hemisection of the spinal cord under medulla oblongata has been studied. These fibers approach the nucleus after the partial secondary crossing of the descending respiratory pathway on the level of cervical segments. Degenerated fibers follow the dendrites of phrenic motoneurons and approach the basal segments of dendrites but do not reach the cell bodies. Possible mode of control over phrenic nucleus activity is under discussion.
D000818:Animals; D002415:Cats; D003712:Dendrites / Q000502:physiology / Q000648:ultrastructure; D003964:Diaphragm / Q000294:innervation; D009046:Motor Neurons / Q000166:cytology / Q000502:physiology; D009410:Nerve Degeneration; D009412:Nerve Fibers / Q000033:anatomy & histology* / Q000502:physiology; D010791:Phrenic Nerve / Q000033:anatomy & histology* / Q000502:physiology; D013116:Spinal Cord / Q000033:anatomy & histology* / Q000502:physiology / Q000601:surgery; D013997:Time Factors
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