NEUR3112 Study Guide - Final Guide: Receptive Field, Retina Horizontal Cell, Sensory Neuron
Document Summary
Receptive field of a sensory neuron -> particular region of the sensory space in which a stimulus will modify the action of that cell. Where the light in shone, a response will be stimulated. Light anywhere else on the retina (outside the receptive field) -> no effect on activity. Surround is mediated by cross pathway e. g. horizontal cells. Orientation and common symbols/shapes -> like hands, faces, edges, etc. Changes sign of the photoreceptor -> when the photoreceptor is hyperpolarised, the bipolar cell is depolarised. If the photoreceptor cell is hyperpolarised, then the bipolar cell is hyperpolarised. Indirect pathway -> has a horizontal cell relaying information from the surround area. All photoreceptors synapse onto the single bipolar cell. Bipolar cells hyper- or de-polarise depending on where light is being shone on their receptive field. Neur3112 - systems neuroscience page 1 receptive field. Express ionotropic glutamatergic receptors at their dendritic terminals (which open ion channels when activated)
