PS263 Study Guide - Midterm Guide: Anterior Cerebral Artery, Posterior Cerebral Artery, Middle Cerebral Artery
Document Summary
The cells work constantly in the dark, when you turn on the light they turn off. The dark current: keep sensors in the polarized state. Opto-genetics: optically activated genes and put them into animals, and maybe one day humans. The left hemiretina of each eye (r. visual field) connects to the left lateral geniculate nucleus; the right hemiretina connects to the right lgn. Partial decussation: fibres from each retina cross over in the middle, but not all of them. Only about 10% of the information to the visual cortex is actually primary visual information. The other 90% comes form the brain, especially memory centres. What you see is only 10% of the actual visual world. Remembered present: when you see something in the present, you are remembering the present. Information received at adjacent portions of the retina remains adjacent in the striate cortex.
