Responses of Single Cells within the Cat Medulla During Prolonged Constant Angular Acceleration.
Technical rept. Feb 68-Jan 70,
EDGEWOOD ARSENAL MD
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Single-cell discharges from within the vestibular nuclei were recorded during constant angular accelerations of up to 5-min duration and during sinusoidal angular acceleration. The forms of discharge patterns are described and emphasis is placed on analyses of adaptation to long-term constant stimuli. The great majority of the units will show a discharge increase and then a decline during the first 45 sec of acceleration. Results from longer accelerations, however, lead to the conclusion that a simple model based on a slightly underdamped cupular mechanism does not conform to the responses and neither does an adaptation explanation. It is speculated that a substantial processing of the sensory input takes place at the level of the second-order neuron and what is often seen in these recordings are functions more closely correlated with various response requirements than with one-to-one events at the sense organ. Author
- Stress Physiology