Superior vestibular nucleus neurones related to the excitatory vestibulo-ocular reflex of anterior canal origin and their ascending course in the cat.
Stimulation of the superior vestibular nucleus and the anterior canal nerve evoked mono- and disynaptic excitatory postsynaptic potentials, respectively, in contralateral inferior oblique motoneurones of the cat. Combined stimulation revealed that the superior vestibular nucleus relayed excitatory anterior canal signals to the motoneurones. Thirty-six superior vestibular neurones receiving anterior canal inputs were activated antidromically by microstimulation of the contralateral inferior oblique motoneurone pool. Their axons ascended neither in the brachium conjunctivum nor in the medial longitudinal fasciculus, but proceeded rostrally in the ventral part of the brain stem.
D000818:Animals; D002415:Cats; D004056:Differential Threshold; D004558:Electric Stimulation; D009046:Motor Neurons / Q000502:physiology; D009474:Neurons / Q000502:physiology; D009801:Oculomotor Muscles / Q000502:physiology; D009802:Oculomotor Nerve / Q000502:physiology*; D011930:Reaction Time; D012018:Reflex / Q000502:physiology*; D014725:Vestibular Nerve / Q000166:cytology / Q000502:physiology*