Projections from inspiratory neurons of the nucleus retroambigualis to phrenic motoneurons in the cat.
The connection between the inspiratory neurons of the nucleus retroambigualis and the phrenic motoneurons was examined using the techniques of antidromic mapping to discover collaterals and spike-triggered averaging to detect postsynaptic potentials. Axon collaterals within the region of the C5 phrenic nucleus were found for 17 of 26 (65%) inspiratory neurons and 6 of these 17 (35%) were shown to generate excitatory postsynaptic potentials in at least one phrenic motoneuron. It was concluded that these results demonstrate a strong connection for those inspiratory neurons of the nucleus retroambigualis with a collateral within the phrenic nucleus.
Fedorko
L
L
Mt. Sinai Hospital Research Institute, Toronto, Ontario, Canada.
Hoskin
R W
RW
Duffin
J
J
D000818:Animals; D001370:Axonal Transport; D001921:Brain / Q000502:physiology*; D002415:Cats; D003964:Diaphragm / Q000294:innervation; D005073:Evoked Potentials, Somatosensory; D005260:Female; D001239:Inhalation; D008297:Male; D009046:Motor Neurons / Q000502:physiology*; D009431:Neural Conduction; D009474:Neurons / Q000502:physiology*; D010791:Phrenic Nerve / Q000502:physiology*; D012119:Respiration; D013569:Synapses / Q000502:physiology