Presentation is loading. Please wait.

Presentation is loading. Please wait.

Face Recognition in the Brain Arash Afraz.

Similar presentations


Presentation on theme: "Face Recognition in the Brain Arash Afraz."— Presentation transcript:

1 Face Recognition in the Brain Arash Afraz

2

3

4

5

6

7 How Does the Brain Represent FACE???

8 Electrophysiological Studies Imaging Studies Behavioral Studies

9 Electro -physiological Studies:

10 Face selective neurons in the temporal cortex of monkey were reported in 1972.

11

12

13

14

15

16

17

18 TE  Face Identity STS  Facial Expression

19

20 Neural Encoding!?!?

21

22 Global Categories: Monkey, Human & Shape. Fine Categories: Monkey Identity (F1), Monkey Expression (F2), Human Identity (F3) & Human Expression (F4)

23

24

25

26 I See a face – a happy face!

27 Latency Coding in Face neurons?

28 Imaging Studies:

29 Fusiform Face Area Imaging studies (Nancy Kanwisher).

30

31

32

33

34

35

36 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

37 Optical Imaging investigations convey the same results.

38 Behavioral Studies:

39 Face Inversion Effects

40

41

42

43 Laterality in Perceiving Facial Expression

44 Prosopagnosia

45

46 Adaptation and After-effects in Face Perception!?

47

48

49 Simple Adaptations

50 What about high level visual stimuli like faces?

51 Morphing: Computerized Controlled Distortion of Faces

52

53

54

55 Effect of inversion:

56 Effect of translation:

57 A simple experiment!

58 Adaptation

59 Test!

60 Adaptation

61 Test!

62 A simple experiment!

63 Use of adaptation paradigms in investigating higher level questions Face adaptation is reduced by binocular suppression. Farshad Moradi, Christof Koch, Shinsuke Shimojo

64 New Prospects: Face as a dynamic visual stimulus

65 Facial mimic and Facial Motion

66

67

68

69


Download ppt "Face Recognition in the Brain Arash Afraz."

Similar presentations


Ads by Google