PHYSIOLOGICAL CHARACTERISTICS OF FIRST ORDER HORIZONTAL CANAL NEURONS IN GUINEA PIGS
3. RELATIONSHIP BETWEEN SPONTANEOUS ACTIVITY AND RESPONSE TO ANGULAR ACCELERATION
1986 Volume 89 Issue 6 Pages 695-698
Details
1986 Volume 89 Issue 6 Pages 695-698
Physiological characteristics of first order horizontal canal neurons, especially the relationship between their spontaneous activity and response to angular acceleration were studied in 20 albino guinea pigs. The average resting ISI was 48.9ms and this was clearly lower than that in pigmented guinea pigs. The neurons differentiated into three groups according to their CV values. These called regular, intermediate, and irregular neurons. The average resting ISI of these three groups were 19.9, 32.9, and 124.8ms. respectively.
The responses to sinusoidal rotation were similar to those found in pigmented guinea pigs and other spieces. That is the regular neurons tend to have lower gains re angular velocity (average-ing 0.16 spikes/sec/deg/sec) and a longer phase lag re acceleration (averageing 93.1 degrees), and the irregular neurons show higher sensitivity re angular acceleration (averageing 0.6 spikes/sec/ deg/sec) and shorter phase lag re acceleration (averageing 72.7 degrees) at a stimulus frequency of 0.3Hz.
