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The neural basis of face recognition? Tim Andrews

The neural basis of face recognition? Tim Andrews. Unfamiliar. Familiar. Hancock, Bruce and Burton (2000) Trends in Cognitive Sciences 4:330-337 Jenkins, White, Van Monfort , Burton (2011) Cognition 121: 313-323. Outline. Which areas of the brain respond to images of faces?

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The neural basis of face recognition? Tim Andrews

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  1. The neural basis of face recognition? Tim Andrews

  2. Unfamiliar Familiar Hancock, Bruce and Burton (2000) Trends in Cognitive Sciences 4:330-337 Jenkins, White, Van Monfort, Burton (2011) Cognition 121: 313-323

  3. Outline • Which areas of the brain respond to images of faces? • Are these regions selective for the identity of the face? • Which aspects of the face are important for representing facial identity? • Is an image-invariant neural code used to represent information about identity? • Are face-selective regions sufficient for face recognition?

  4. Face localiser scan

  5. zscore 7.4 4.6 Face-selective regions FFA: fusiform face area OFA: occipital face area STS: superior temporal sulcus STS OFA FFA Haxby, Hoffman & Gobbini, TICS 4: 223-233 (2000) Bruce & Young (1986) Br. J. Psychology 77: 305-327 Calder & Young, Nature Reviews Neuroscience 6: 641-51 (2005)

  6. Outline • Which areas of the brain respond to images of faces? • Are these regions selective for the identity of the face? • Which aspects of the face are important for representing facial identity? • Is an image-invariant neural code used to represent information about identity? • Are face-selective regions sufficient for face recognition?

  7. fMR-adaptation Grill-Spector, Henson & Martin (2006) Trends Cog Sci 10: 14-23 Krekelberg, Boynton and van Wezel (2006) Trends Neurosci 29: 250-256

  8. fMR- adaptation to intact, but not scrambled faces Andrews, Clarke, Pell, Hartley (2010) Neuroimage 49: 703-711

  9. No adaptation to images of places Andrews, Clarke, Pell, Hartley (2010) Neuroimage 49: 703-711

  10. Outline • Which areas of the brain respond to images of faces? • Are these regions selective for the identity of the face? • Which aspects of the face are important for representing facial identity? • Is an image-invariant neural code used to represent information about identity? • Are face-selective regions sufficient for face recognition?

  11. Internal and external features

  12. fMR-adaptation to internal and external features of faces Andrews, Davies-Thompson, Kingstone & Young (2010) J. Neuroscience 30: 3544-22

  13. Composite face images

  14. Adaptation to composite faces same internal, same external same internal, diff. external diff. internal, same external diff. internal, diff. external Andrews, Davies-Thompson, Kingstone & Young (2010) J. Neuroscience 30: 3544-22

  15. The Presidential Illusion! FFA OFA STS Sinha and Poggio (1996) Nature 384:404 Sinha and Poggio (2002) Perception 31:131

  16. Face to Face Coalition! FFA OFA STS Andrews and Thompson (2010) iPerception 1: 28-30

  17. Outline • Which areas of the brain respond to images of faces? • Are these regions selective for the identity of the face? • Which aspects of the face are important for representing facial identity? • Is an image-invariant neural code used to represent information about identity? • Are face-selective regions sufficient for face recognition?

  18. Unfamiliar Familiar

  19. Image invariant adaptation to familiar faces in FFA FFA Experiment 1: same identity Experiment 2: different identity

  20. Image invariant adaptation to unfamiliar faces in FFA FFA Experiment 1: same identity Experiment 2: different identity

  21. No adaptation to facial identity in STS Experiment 1: same identity Experiment 2: different identity

  22. Outline • Which areas of the brain respond to images of faces? • Are these regions selective for the identity of the face? • Which aspects of the face are important for representing facial identity? • Is an image-invariant neural code used to represent information about identity? • Are face-selective regions sufficient for face recognition?

  23. Case Study - JJ • 17 year old male • Complete loss of vision following head trauma • Visual acuity recovered after 5 days, but he retained a specific deficit in colour and face perception • 10 days after injury, battery of visual tests revealed normal acuity, stereopsis, motion discrimination, contrast sensitivity, object/place recognition, but still had abnormal colour vision and remained densely prosopagnosic. • After 4 months he showed a complete recovery of colour and face perception.

  24. Structural MRI revealed no obvious lesion

  25. Normal functional responses in face-selective regions OFA FFA STS FFA FFA FFA Pre-recovery Post-recovery Controls

  26. Conclusions

  27. Thanks to… • Jodie Davies-Thompson • Andy Young • Heidi Baseler • Andre Gouws • Simon Hickman • Alan Kingstone • Tony Morland • Peter Thompson • Wellcome Trust • ESRC

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