the neural basis of face recognition? tim andrews
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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? - PowerPoint PPT PresentationTRANSCRIPT
The neural basis of face recognition?
Tim Andrews
Familiar
Unfamiliar
Hancock, Bruce and Burton (2000) Trends in Cognitive Sciences 4:330-337Jenkins, White, Van Monfort, Burton (2011) Cognition 121: 313-323
Outline
1. Which areas of the brain respond to images of faces?
2. Are these regions selective for the identity of the face?
3. Which aspects of the face are important for representing facial identity?
4. Is an image-invariant neural code used to represent information about identity?
5. Are face-selective regions sufficient for face recognition?
Face localiser scan
Face-selective regions
FFA: fusiform face areaOFA: occipital face areaSTS: superior temporal sulcus
7.4
4.6
zscore
OFA
STS
FFA
Haxby, Hoffman & Gobbini, TICS 4: 223-233 (2000)Bruce & Young (1986) Br. J. Psychology 77: 305-327Calder & Young, Nature Reviews Neuroscience 6: 641-51 (2005)
Outline
1. Which areas of the brain respond to images of faces?
2. Are these regions selective for the identity of the face?
3. Which aspects of the face are important for representing facial identity?
4. Is an image-invariant neural code used to represent information about identity?
5. Are face-selective regions sufficient for face recognition?
fMR-adaptation
Grill-Spector, Henson & Martin (2006) Trends Cog Sci 10: 14-23Krekelberg, Boynton and van Wezel (2006) Trends Neurosci 29: 250-256
Andrews, Clarke, Pell, Hartley (2010) Neuroimage 49: 703-711
fMR- adaptation to intact, but not scrambled faces
Andrews, Clarke, Pell, Hartley (2010) Neuroimage 49: 703-711
No adaptation to images of places
Outline
1. Which areas of the brain respond to images of faces?
2. Are these regions selective for the identity of the face?
3. Which aspects of the face are important for representing facial identity?
4. Is an image-invariant neural code used to represent information about identity?
5. Are face-selective regions sufficient for face recognition?
Internal and external features
fMR-adaptation to internal and external features of faces
Andrews, Davies-Thompson, Kingstone & Young (2010) J. Neuroscience 30: 3544-22
Composite face images
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
The Presidential Illusion!
FFA OFA STS
Sinha and Poggio (1996) Nature 384:404
Sinha and Poggio (2002) Perception 31:131
Face to Face Coalition!
FFA OFA STS
Andrews and Thompson (2010) iPerception 1: 28-30
Outline
1. Which areas of the brain respond to images of faces?
2. Are these regions selective for the identity of the face?
3. Which aspects of the face are important for representing facial identity?
4. Is an image-invariant neural code used to represent information about identity?
5. Are face-selective regions sufficient for face recognition?
Familiar
Unfamiliar
Experiment 1: same identity
Experiment 2: different identity
Image invariant adaptation to familiar faces in FFAFFA
Experiment 1: same identity
Experiment 2: different identity
Image invariant adaptation to unfamiliar faces in FFAFFA
Experiment 1: same identity
Experiment 2: different identity
No adaptation to facial identity in STS
Outline
1. Which areas of the brain respond to images of faces?
2. Are these regions selective for the identity of the face?
3. Which aspects of the face are important for representing facial identity?
4. Is an image-invariant neural code used to represent information about identity?
5. Are face-selective regions sufficient for face recognition?
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.
Structural MRI revealed no obvious lesion
Normal functional responses in face-selective regions
FFA FFA STS OFA FFA
FFAPre-recovery Post-recovery Controls
Conclusions
Thanks to…• Jodie Davies-Thompson• Andy Young• Heidi Baseler• Andre Gouws• Simon Hickman• Alan Kingstone• Tony Morland• Peter Thompson
• Wellcome Trust• ESRC