BMS1052 Lecture Notes - Lecture 13: Neural Pathway, Diencephalon, Superior Colliculus
18 Aug 2018
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Document Summary
Describe the structure and benefits of center-surround receptive fields. Describe the projections of magno-, parvo- and konio-cellular retino-thalamic projections. Describe how the visual field is assembled from inputs from the 2 eyes and the effects of lesions in different positions along the visual pathway. Describe the functional organisation in v1 and the basic properties of simple and complex cells. Identify the major functional roles of the dorsal and ventral visual streams. Receptive fields and bipolar cells a receptive field is the region of space in which light changes affect a cell"s membrane potential. Bipolar cells have an antagonistic, center surround receptive field structure in the dark, photoreceptors are depolarised and tonically active. Increased light hyperpolarizes them, thus reducing glutamate output thus light off = increase glutamate, light on = reduced glutamate. The center surround receptive field light in the center and surrounding of a bipolar cell does different things to the membrane potential.
