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Face Recognition in the Brain Arash Afraz
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How Does the Brain Represent FACE???
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Electrophysiological Studies Imaging Studies Behavioral Studies
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Electro -physiological Studies:
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Face selective neurons in the temporal cortex of monkey were reported in 1972.
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TE Face Identity STS Facial Expression
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Neural Encoding!?!?
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Global Categories: Monkey, Human & Shape. Fine Categories: Monkey Identity (F1), Monkey Expression (F2), Human Identity (F3) & Human Expression (F4)
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I See a face – a happy face!
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Latency Coding in Face neurons?
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Imaging Studies:
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Fusiform Face Area Imaging studies (Nancy Kanwisher).
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Face neurons are clustered in ventral visual pathway in few patches (say 5 or 6) Amount and distribution of face selective patches are similar in humans and monkeys
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Optical Imaging investigations convey the same results.
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Behavioral Studies:
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Face Inversion Effects
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Laterality in Perceiving Facial Expression
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Prosopagnosia
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Adaptation and After-effects in Face Perception!?
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Simple Adaptations
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What about high level visual stimuli like faces?
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Morphing: Computerized Controlled Distortion of Faces
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Effect of inversion:
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Effect of translation:
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A simple experiment!
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Adaptation
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Test!
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Adaptation
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Test!
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A simple experiment!
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Use of adaptation paradigms in investigating higher level questions Face adaptation is reduced by binocular suppression. Farshad Moradi, Christof Koch, Shinsuke Shimojo
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New Prospects: Face as a dynamic visual stimulus
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Facial mimic and Facial Motion
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