PSYC310 Lecture Notes - Lecture 2: Detection Theory, Phineas Gage, Receptive Aphasia
3 Mar 2017
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How do we study perception: neuroscience: relatively physical states and psychological states to brain states. Neuroimaging: psychophysics: relating physical states to mental states. Wenicke"s: cannot understand language (cid:523)receptive: tatsuji inouye (1904) gunshot wounds localized damage, penfield montreal procedure to treat epilepsy by destroying nerve. Sensory homunculus (sensory gyrus somatosenses: enlightenment neurons. Stimulation different part, feel it in different places. Fluorescent microscopy: cause cells to express different: phineas gage cells. Nervous system proteins: consists of neurons, cns and pns, glia cells, most sensory receptor cells are pns (except cells in retina/optic nerve, periphery: spinal nerves, cns: gray versus white. Gray cell bodies of neurons, some axons, some support cells. White tracts (axon bundles) and glia. Different shapes, common feature on squid giant axon: neuron. Dendrite body axon synapse. Hodgkin huxley model 1952: neuron as electric circuit, based. Neurotransmitter chemical signals action potentials = electric potential changes influence action potential of receiving cell: tetrodotoxin in pufferfish plugs na+ channels no action potentials.
