. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 534 DAXIEL L. ALKOX I 5 mV •L,,',- vj jjjjj J J JJ i j <~ f*S - /- . «v- _u_^__f ^ FIGURE 26. Depolarization of Type B photoreceptor (lower record) follows impulse train of ipsilateral caudal hair cell (upper record). A positive current pulse (+ nA) injected into hair cell elicits increased firing of hair cell and slight inhibition of Type B cell. After high fre- quency firing hair cell remains slightly hyperpolarized and without impulse activity while Type B cells show increased EPSPs and prolonged depolarization
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 534 DAXIEL L. ALKOX I 5 mV •L,,',- vj jjjjj J J JJ i j <~ f*S - /- . «v- _u_^__f ^ FIGURE 26. Depolarization of Type B photoreceptor (lower record) follows impulse train of ipsilateral caudal hair cell (upper record). A positive current pulse (+ nA) injected into hair cell elicits increased firing of hair cell and slight inhibition of Type B cell. After high fre- quency firing hair cell remains slightly hyperpolarized and without impulse activity while Type B cells show increased EPSPs and prolonged depolarization (Tabala and Alkon, in preparation). with fewer impulses and the Type B with more impulses in response to light during retention of long-term associative behavioral change specific to training with paired (but not random) light and rotation (Crow and Alkon, 1978). Intracellular record- ings from nervous systems isolated from animals trained in this way showed that Type B photoreceptors' impulse activity following a light step was particularly en- hanced in animals which had associative training (X = ), compared (t = ; P < ) to random (X = ) and other control training paradigms. These and other changes of Type B photoreceptor responses, specific to training with paired stimuli, also persisted during long-term retention of the associative behavioral change (Crow and Alkon, 1980). As another example of a change specific to associative training. Type B input resistance for the paired group (X — Mn) was significantly greater (Mann-Whitney U test, U - 4; P — ) than that for the random control group (X = Mn). Dr. Crow and I also found that there was a significant positive correlation (Spearman P = ; P < ) between the Type B impulse frequency after training and the behavioral response latencies to INTERNEURONS. STATOCYST FIGURE 27. Schematic summary (partial) of ipsilateral neural interactions within and between the visual, statocys
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
