PSYCH261 Lecture Notes - Lecture 28: Retinitis Pigmentosa, Cerebral Cortex, Optical Fiber
29 Apr 2019
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Na+, k+, and ca2+ ions: opens when blue light strikes it; rush of na+ and ca2+ causing depolarization and excitation, natronomonas pharaonic halorhodopsin controls a transporter that moves cl- into the cell when activated by yellow light. Used to treat symptoms of neurological and mental disorders; can either excite or interfere with the function of the region it is placed over. Record electrical activity of regions of the brain. Metal microelectrodes can be implanted permanently to record neural activity as animal moves. In humans, usually attached to the scalp with a special paste that conducts electricity. Can determine the location of a group of neurons firing synchronously. Measures regional metabolic activity of the human brain. Measures regional metabolic activity of the human brain; better spatial and temporal resolution that pet scan. Can localize any radioactive substance taken up in the human brain. Stimulates neurons near the tip of the electrode and axons passing through the region.
