PSYB57H3 Lecture Notes - Lecture 3: Cerebral Achromatopsia, Cortical Blindness, Phosphene
Document Summary
Transduction (taking physical energy and turning into neural signals) Retinotopic mapping in brain upside down and backwards. Damage to occipital lobe leads to partial/full cortical blindness. Born blind occipital lobes remapped for touch. Earlier you lose vision, more likely occipital lobe will remap for touch. When transcranial magnetic simulation the occ lobes, phosphenes (stars in the morning) Blindsight: 10% pathway; old visual system allowing ppl to respond to things in environment that"s (cid:373)o(cid:396)e auto(cid:373)ati(cid:272); has eyes ope(cid:374) (cid:271)ut (cid:449)o(cid:374)t (cid:449)o(cid:396)k if da(cid:373)aged to (cid:271)oth. Visual area 4 for colour: cerebral achromatopsia: damage to occ lobe processing region resulting in hemi or full colour loss; lack of colour has effect on sex and food; split up the middle when hemi. Visual area 5: cerebral akinotopsia: damage to occ lobe resulting to impair motor perception; like snapshot and not smooth; damage to right and affect whole visual array. Recognizable objects vs nonsense objects= ventral stream activation.
