PSYB45H3 Chapter Notes - Chapter 13: Calcarine Sulcus, Temporal Lobe, Two-Streams Hypothesis
Document Summary
Calcarine sulcus: lateraly separates occipital lobe (dividing upper and lower half of visual field) Collateral sulcus: ventral surface of occipital lobe extending towards temporal. Lingual gyrus: includes part of v2 and vp. No clear divisions between occipital and temporal lobe and parietal lobe on lateral surface (confusion of actuall boundries) The discovery that v1 is heterogeneous (that a single cortical area could have multiple separate functions) was unexpected. Striate cortex (striped cortex): thin stripe-colour perception; thick stripes- form percepropn and pale stripes- moton perception. Colour perception-adaptive- primates-selecting edible fruit on background of green leaves. Before we had a hierarchical view of visual pathway but now we know that it is more like a distributed hierarchical process with multiple parallel and interconnecting pathways. V1-is the striate cortex- primary vision area- receives largest lgn input and projects to all other visual areas- most basic/ fundamental level of processing. V2- input from v1- projects to all other occipital regions- second level.
