NBB 201 Lecture Notes - Lecture 18: Posterior Parietal Cortex, Inferior Temporal Gyrus, Two-Streams Hypothesis
20 Nov 2017
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Primates use faces for identification and social communication. Face perception and face processing: we get lots of so(cid:272)ial i(cid:374)for(cid:373)atio(cid:374) fro(cid:373) peoples" fa(cid:272)es. What do we learn about people by looking at their face: emotions, health, identity, age, ethnicity, mood, etc. Later became sheep farmer: given recognition memory test where first presented 8 human faces, then presented with 16 in which 8 were novel. Goal was to identify the novel faces in the second slide: he (cid:272)ould(cid:374)"t re(cid:272)og(cid:374)ize the hu(cid:373)a(cid:374) fa(cid:272)es a(cid:374)d (cid:271)asi(cid:272)ally guessed at chance. In fmri study, subjects had to look at series of faces. In one condition, were instructed to follow the eye gaze of the faces. If you put monkey in fmri scanner and show face stimuli, observe activation in sts and it: visual cortical areas in monkeys and humans. The amygdala is known to process the affective significance of faces: sts feeds info about dynamic aspects of face through amygdala.
