BIOL 306 Lecture Notes - Lecture 11: Amacrine Cell, Receptive Field, Ganglion Cell
10 Oct 2018
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Counting model seems to be that neurons are naturally inhibited and they require sufficient additive effects from epsps to fire. Stereotyped behavior of: orienting head, approaching, fixating, snapping, cleaning. Worm bar moving longitudinally, in the same direction as the long axis. Antiworm bar moving in the same direction as its short axis. Speed affects rate of turning when in the worm configuration. The configuration of the retina and visual system (in bold: what was told in class) Photoreceptors (rods and cones) respond to light and eventually excite the retinal ganglion cells. Retinal ganglion cells: send visual signals from the retina to. On-center ganglion cells: excited by light in their receptive field center and inhibited by light in their receptive field surround. Least spiking if light shines in the receptive field surround: surround-inhibition is partly mediated by horizontal cells. Horizontal cells activated by the activation of the surrounding receptors and give an inhibition signal.
