PSY 260 Lecture Notes - Lecture 2: Positron, Parahippocampal Gyrus, Functional Magnetic Resonance Imaging
31 Jan 2017
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Document Summary
Study of cog behaviors and process of brain. Electrical potential: k+ & cl- ions inside, na+ ions outside, electrical potential of -70 mv inside relative to outside of neuron. Firing change in e potential: from -70 mv to +40mv, caused by na+ flooding through membrane, ions flow through protein channels of protein molecules, k+ leaves cell; becomes -70mv. Return to normal: k+ enter, na+ leave sodium potassium pump. Synapse gap b/w 2 neurons: one sending neurotrans = pre-synaptic neuron, receiving neurotrans = post- synaptic neuron, neurotrans diffuse over synapse. Neurotrans: excitatory increase firing rate, inhibitory reduce firing rate, both signals from pre-synaptic neurons are summed by post synaptic neuron, spike trains. Limbic system: hippocampus (new memories), amygdala (emotion) Temporal lobe language, speech, vision: visual neglect damage to right parietal lobe, perceptual suppression of stimuli in visual field opposite of lesion brain hem. Link to attention; things in world are neglected.
