PSY 3061 1st Edition Lecture 10Outline of Last Lecture I. Electrophysiology in humansII. How do we measure neural structures noninvasivelyIII. Imaging brain functionIV. Inferring brain functionOutline of Current Lecture I. Transcranial Magnetic StimulationII. Exteroceptive sensesCurrent LectureI. Transcranial Magnetic Stimulationa. Excite or inhibit certain brain tissuesb. More reversible and noninvasivec. Can be used on most humans d. Taking away the function of the tissue without damaging it e. Induce a magnetic field next to the field induces an electric field in the brain (kind of like the opposite of an fMRI)II. Exteroceptive sensesa. External stimulationb. Sensation: process of detecting the presence of a stimulusc. Perception: process of consciously recognizing and interpreting a sensationd. Sensory information climbs a hierarchy. Sensation is lower order and moves up to the higher order perceptione. Somatosensory, visual, and auditory info passes through the thalamus before researching the cortexf. Audition g. Somatosensoryi. Process of detecting changes in pressure, skin stretch, vibration, temperature on places on the bodyii. Structure of a receptor cell enables it to respond specifically to certain stimuli slowly or quicklyiii. Merkel’s disks: cutaneous receptors that respond slowly to skin pressureiv. Pacinian corpuscles: cutaneous receptors that respond quickly to changes in pressure on the skinv. Free nerve endingsvi. Somatosensory cortex is located in the parietal lobevii. Primary sensory cortex is organized somatotopicallyh. Olfactioni. Gustationj.
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