PSYC 2050U Lecture Notes - Lecture 4: Inferior Temporal Gyrus, I Spy, Binocular Rivalry
Document Summary
Each sensory-receptor organ and cell has a receptive field. Signals from sensors are encoded by the brain and deciphered as a perception. Environmental energy (sensory stimulus) transduced to electrical (neural) energy. Vision: light chemical energy in the photoreceptors action potentials. Audition: air pressure waves mechanical energy action potentials. Specific location on retina or skin to which a single sensory receptor or neuron responds to stimulation. Helps locate sensory events in space or on skin. Can determine type of stimulation to which neuron is sensitive (e. g. heavy vs. light touch) Each sensory system has one primary cortical area. Perform more complex aspects of the sensory modality. Detect wavelengths between 400 and 700 nanometres. Transduce light energy to electrical (neural) signal. Light passes through the cornea and into the eye. The pupil is surrounded by the iris, which can contract to limit the amount of light. The lens focuses the light on the retina at the back of the eye.
