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Unformatted text preview: test tuning of V4
neurons for curvature FIG. 1. Pasupathy and Connor, 2001 Stimulus set. Each stimulus is represented by a white icon drawn within a black circle representing the receptive ﬁeld V4 Example stimuli used
to test tuning of V4
neurons for curvature V4 V4 neurons are tuned
for curvature ...
(which is another way
of saying we donʼt
understand it) Where (reds) “IT” What (blues)
John Maunsell, after Peter Lennie after Felleman & Van Essen, 1991 IT Example stimuli used to test the tuning of IT neurons for objects Image reduction Technique: ﬁnd a picture that an IT
neuron has a high ﬁring rate response for,
and then “reduce” it to its simplest
elements Kobatake & Tanaka, 1994 How does the neural code for objects change as signals propagate
through the brain?
Answer: somewhere in the middle
Neurons are responding to
something about “objects” (not
just features) in IT Suggests a representation of
speciﬁc objects IT neurons are not all
speciﬁc object detectors BUT ... IT
Image reduction The simplest elements recovered for
neurons in different visual areas IT
Image reduction Does this sugg...
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This note was uploaded on 09/08/2013 for the course BBB 217 taught by Professor Nicolerust during the Spring '12 term at UPenn.
- Spring '12