. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. R P. 20 mV I sec FIGURE 23. Conceptual model for hair-cell voltage-noise and generator-potential produc- tion. The hair is inherently motile (range of motion indicated by dash lines). (A) When the hair cell (oriented in the same direction as the centrifugal force vector) experiences a nega- tive centrifugal force, the hair moves freely through a maximum range of motion producing little voltage noise (see noise record on right). (B) When the hair cell on that statocyst equator visualized when looking dorsoventrally is exposed
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. R P. 20 mV I sec FIGURE 23. Conceptual model for hair-cell voltage-noise and generator-potential produc- tion. The hair is inherently motile (range of motion indicated by dash lines). (A) When the hair cell (oriented in the same direction as the centrifugal force vector) experiences a nega- tive centrifugal force, the hair moves freely through a maximum range of motion producing little voltage noise (see noise record on right). (B) When the hair cell on that statocyst equator visualized when looking dorsoventrally is exposed to zero centrifugal force, the hair has some interaction with the statoconium. The statoconium exerts little net force on the hair although collisions of the statoconium with the rigid hair increase the voltage noise vari- ance and frequency (voltage noise record on right). (C) When the hair cell (with lutninal surface opposite the force vector) is exposed to a substantial centrifugal force ( g), the statoconium exerts a considerable net force on the hair, limiting its range of movement and reducing its movement frequency as well as dramatically increasing the voltage noise variance (see noise record on right). The increase of voltage noise variance and frequency results, by summation of individual events, in a depolarizing generator potential. Dash line indicates a positive centrifugal force exerted by rotation. All noise records were taken from actual hair cells under the conditions described (Grossman et a/., 1979). within connectives exiting the circumesophageal nervous system and coursing peripherally to innervate the animal's musculature. We have been able to relate this output activity to input (light) responses of the photoreceptors (Richards, Lederhendler, and Alkon, in preparation). This approach should enable us to better understand the behavioral meaningfulness of changes in Type B firing frequency elicited by natural stimuli as well as consequent to traini
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
