PSY393H5 Lecture Notes - Lecture 5: Lateral Geniculate Nucleus, Receptive Field, Parietal Lobe
Document Summary
Need for attention increases with increasing sensory and motor capacity. Ability to focus on one thing among. Ability to focus on multiple things at competing stimuli once. Attention is split- prone to more mistakes. V1- primary: receives info from lateral geniculate nucleus -> v2. V2- secondary: passes info to v3 and v4. Hypothesis: attention should affect neuronal response to stimuli. Monkey release bar when certain stimulus presented in certain location. Neuron can learn to respond selectively to info in its receptive field. Learned to ignore stimuli in all other locations. Task difficulty: cell: optimal response to particular range, easy discrimination, stimuli within and outside range clearly differ, difficult discrimination, both sti(cid:373)uli (cid:449)ithi(cid:374) (cid:272)ell"s p(cid:396)efe(cid:396)(cid:396)ed o(cid:396)ie(cid:374)tatio(cid:374) V4 first area neuronal response gated by attention. Increasing task difficulty -> increased attention demands -> altered neural processing. Tasks that require withholding of response: stroop task. Increased difficulty increases ofc activity: go/nogo task.
