Unformatted text preview: es) 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 IT neurons are not all
speciﬁc object detectors Object-speciﬁc detectors might exist “beyond” the visual system “parahippocampal
cortex” “Jennifer Aniston Neurons” Quiroga et al, 2005 “Robert Plant Neurons” Not just visual - respond to the name as well Within the visual system, faces may be
Human high-level vision, faces, “agnosias” Prosopagnosia Faces may be special
Monkey face patch
Find “face patches” with fMRI and then record from the individual neurons with
electrodes fMRI: Respond to faces more than
other things Faces may be special
Monkey face patch Neurons in the face patch respond to many
different faces (but not other things) How do we know if neurons in IT are actually involved in
object perception (as opposed to just ﬁring)?
Removal or inactivation of the neurons results in a
Neural and psychophysical sensitivities can be
Artiﬁcial activation of the neurons shifts perception in a
At or near threshold, trial-by-trial ﬂuctuations in
behavior are correlated with trial-by...
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- Spring '12
- van Essen, PLO