PMID- 27989842
OWN - NLM
STAT- MEDLINE
DCOM- 20180220
LR  - 20191210
IS  - 1095-9572 (Electronic)
IS  - 1053-8119 (Linking)
VI  - 146
DP  - 2017 Feb 1
TI  - Recognizing approaching walkers: Neural decoding of person familiarity in 
      cortical areas responsive to faces, bodies, and biological motion.
PG  - 859-868
LID - S1053-8119(16)30594-8 [pii]
LID - 10.1016/j.neuroimage.2016.10.042 [doi]
AB  - In natural viewing environments, we recognize other people as they move through 
      the world. Behavioral studies indicate that the face, body, and gait all 
      contribute to recognition. We examined the neural basis of person recognition 
      using a decoding approach aimed at discriminating the patterns of neural activity 
      elicited in response to seeing visually familiar versus unfamiliar people in 
      motion. Participants learned 30 identities by viewing multiple videos of the 
      people in action. Recognition was tested inside a functional magnetic resonance 
      imaging (fMRI) scanner using 8-s videos of 60 people (30 learned and 30 novel) 
      approaching from a distance (~13m). Full brain images were taken while 
      participants watched the approach. These images captured neural activity at four 
      time points (TRs) corresponding to progressively closer views of the walker. We 
      used pattern classification techniques to examine familiarity decoding in 
      lateralized ROIs and the combination of left and right (bilateral) regions. 
      Results showed accurate decoding of familiarity at the farthest distance in the 
      bilateral posterior superior temporal sulcus (bpSTS). At a closer distance, 
      familiarity was decoded in the bilateral extrastriate body area (bEBA) and left 
      fusiform body area (lFBA). The most robust decoding was found in the time window 
      during which the average behavioral recognition decision was made - and when the 
      face came into clearer view. Multiple regions, including the right occipital face 
      area (rOFA), bOFA, bFBA, bpSTS, and broadly distributed face- and body-selective 
      voxels in the ventral temporal cortex decoded walker familiarity in this time 
      window. At the closest distance, the lFBA decoded familiarity. These results 
      reveal a broad system of ventral and dorsal visual areas that support person 
      recognition from face, body, and gait. Although the face has been the focus of 
      most person recognition studies, these findings remind us of the evolutionary 
      advantage of being able to differentiate the people we know from strangers at a 
      safe distance.
CI  - Copyright (c) 2016 Elsevier Inc. All rights reserved.
FAU - Hahn, Carina A
AU  - Hahn CA
AD  - The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX 75080, 
      USA. Electronic address: carina.hahn@utdallas.edu.
FAU - O'Toole, Alice J
AU  - O'Toole AJ
AD  - The University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX 75080, 
      USA.
LA  - eng
PT  - Journal Article
DEP - 20161027
PL  - United States
TA  - Neuroimage
JT  - NeuroImage
JID - 9215515
SB  - IM
MH  - Adult
MH  - Brain/*physiology
MH  - Brain Mapping
MH  - Facial Recognition/*physiology
MH  - Female
MH  - *Gait
MH  - Humans
MH  - Magnetic Resonance Imaging
MH  - Male
MH  - Motion Perception/*physiology
MH  - Photic Stimulation
MH  - Recognition, Psychology/*physiology
MH  - Visual Cortex/physiology
MH  - Young Adult
OTO - NOTNLM
OT  - Familiarity
OT  - Gait
OT  - Person motion
OT  - Spatiotemporal processing
EDAT- 2016/12/19 06:00
MHDA- 2018/02/21 06:00
CRDT- 2016/12/20 06:00
PHST- 2016/06/07 00:00 [received]
PHST- 2016/09/09 00:00 [revised]
PHST- 2016/10/24 00:00 [accepted]
PHST- 2016/12/19 06:00 [pubmed]
PHST- 2018/02/21 06:00 [medline]
PHST- 2016/12/20 06:00 [entrez]
AID - S1053-8119(16)30594-8 [pii]
AID - 10.1016/j.neuroimage.2016.10.042 [doi]
PST - ppublish
SO  - Neuroimage. 2017 Feb 1;146:859-868. doi: 10.1016/j.neuroimage.2016.10.042. Epub 
      2016 Oct 27.