PSYCH 160A Lecture Notes - Lecture 7: Receptive Field, Psych, Cornea
25 Jan 2020
School
Department
Course
Professor
Document Summary
The receptive field of a neuron is the input that drives the neuronal activity (i. e. firing rates) Reflect the sources being integrated by the neuron. We characterize neurons by their receptive field properties. What are the inputs that drive that neuron. What are the defining features of that input. Sensory & motor cortex has neurons with receptive fields organized topographically. Receptive fields increase in size and complexity with increased processing. Eye and early processing relatively simple neural tuning. Higher processing increasing complexity of preferred features. Higher order processing with complex receptive fields built from combinations of simpler outputs from earlier (simpler) visual processing. But: receptive field properties vary depending on context. Neuronal firing rates reflect the combination of feedforward drive and feedback. In the visual system, maps reflect position. Each neuron captures information about a limited scope. And of a particular location (relative to fixation) Position information originates in the eye (the retina) and is retained in cortex.
