[Synaptic processes in motor neurons of the nucleus of the facial nerve upon stimulation of the caudal trigeminal nucleus].
Focal and postsynaptic potentials of facial motoneurons evoked by stimulation of the caudal trigeminal nucleus were studied in cats using extra- and intracellular recording technique. Pre- and post-synaptic components of focal potentials are shown. Four types of motoneuron responses are distinguished: EPSP generating single action potentials; gradual shift of depolarization evoking multiple discharges; rhythmical discharge of action potentials appearing at a low level of depolarization; EPSP and a sequence of EPSP-IPSP. Mono- and predominantly polysynaptic origin of these responses is shown. Possible mechanisms of afferent control of facial motoneuron activity are discussed.
D000200:Action Potentials; D000818:Animals; D001931:Brain Mapping; D002415:Cats; D004558:Electric Stimulation; D005154:Facial Nerve / Q000502:physiology*; D009046:Motor Neurons / Q000502:physiology; D009434:Neural Pathways / Q000502:physiology; D011149:Pons / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D014275:Trigeminal Caudal Nucleus / Q000502:physiology*; D014278:Trigeminal Nuclei / Q000502:physiology*
Sinapticheskie protsessy v motoneĭronakh iadra litsevogo nerva pri razdrazhenii kaudal 'nogo troĭnichnogo nerva.