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Characterize single-neuron discharge properties in the rostral vestibular nuclei and reticular formation during head movement and vertical eye movements.

June 1, 1984Journal of Neurophysiology

Signals in vestibular nucleus mediating vertical eye movements in the monkey

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Authors

RTR. D. TomlinsonThomas Jefferson University DRDavid A. RobinsonRutgers, The State University of New Jersey

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Implication

Neurophysiological study demonstrates functional diversification of vestibular neurons in rhesus monkeys, indicating distinct pathways mediating vertical gaze control.

Key Points

Characterize single-neuron discharge properties in the rostral vestibular nuclei and reticular formation during head movement and vertical eye movements.
Extracellular action potential recordings were conducted in the rostral vestibular nuclei and subadjacent reticular formation of three alert, juvenile rhesus monkeys (N=3).
Eye movements were tracked via the magnetic field-search coil technique across pitch oscillation in darkness, vestibulo-ocular reflex cancellation, smooth pursuit, saccades, and stationary fixation.
Antidromic stimulation of the medial longitudinal fasciculus was delivered to determine projection targets of identified cell types.
Of 527 isolated neurons, 273 were fully classified into six distinct categories: pure-vestibular (15%), vestibular-pause (10%), gaze-velocity (7%), position (33%), position-burst (15%), and position-vestibular-pause cells (20%).
Most neurons encoding eye position also transmitted eye-velocity signals during vertical smooth pursuit, with subcategories displaying differential sensitivity to head velocity during pitch oscillation in darkness.
Antidromic activation showed that position-vestibular-pause, position-burst, and gaze-velocity cells are the predominant contributors projecting through the medial longitudinal fasciculus.

Cite This Study

Tomlinson et al. (1984) studied this question.

synapsesocial.com/papers/6a7817824fe2e6ffd8ed35c0 https://doi.org/10.1152/jn.1984.51.6.1121

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Implication

Neurophysiological study demonstrates functional diversification of vestibular neurons in rhesus monkeys, indicating distinct pathways mediating vertical gaze control.

Signals in vestibular nucleus mediating vertical eye movements in the monkey

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Implication

Key Points

Cite This Study

Signals in vestibular nucleus mediating vertical eye movements in the monkey

Discussion

Member takes

Implication

Key Points

Cite This Study

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