HTHSCI 1G03 Lecture Notes - Lecture 13: Electrophysiology
6 Nov 2016
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Current research suggests that sensory information is combined in a probabilistic manner: Perceptual decisions are not based solely on the most reliable sensory information. Stimulus localization task spread is larger for auditory sound than visual light because sound is. Instead, humans combine multiple sources of sensory information in a probabilistic manner less reliable. If asked where stimulus comes from, participants locate a spot located between the two distributions: mathematically speaking, this would be the optimal location of the signals. Electrodes inserted into different areas of opossum brain. Circles on diagram represent various electrophysiological responses. Opossum presented with 3 different types of stimuli: somatosensory, auditory and visual. In s1, the neurons are almost entirely somatosensory responses (respond to) In v1, the neurons show primarily visual responses (respond to) In a, the neurons show primarily auditory responses (respond to) Trimodal responds to all 3 types of stimuli. Areas inbetween primary sensory corticies show multi-modal responses respond to variety of the stimuli.
