TY - JOUR
T1 - Brain activation during eye gaze discrimination in stable schizophrenia
AU - Kohler, Christian G.
AU - Loughead, James
AU - Ruparel, Kosha
AU - Indersmitten, Tim
AU - Barrett, Frederick S.
AU - Gur, Raquel E.
AU - Gur, Ruben C.
PY - 2008/2
Y1 - 2008/2
N2 - Objective: Earlier studies described gaze discrimination impairment in schizophrenia. The purpose of this study was to compare gaze discrimination abilities and associated brain activation in persons with stable schizophrenia and matched controls. Methods: 13 schizophrenia and 12 healthy participants underwent a gaze discrimination task with face stimuli rotated at 0, 4 and 8° deviation. During fMRI with BOLD imaging, subjects were asked to identify whether a face was making eye contact. Subject-level parameter estimates for BOLD signal change were entered into an orientation by group mixed effect repeated measures ANOVA. Results: Gaze discrimination performance did not differ between groups. Patients showed decreased activation in areas of bilateral inferior frontal and occipital areas, and select temporo-limbic regions, including amygdala. Groups differed by activation patterns according to gaze deviation. In controls, faces with 4° deviation produced higher activation in frontal and temporal regions. In patients, 0° deviation produced increased activation in amygdala and areas of temporal neocortex. Conclusions: Despite similar gaze discrimination abilities, schizophrenia patients exhibit decreased brain activation in areas associated with executive, emotional and visual processing. Controls exhibited increased activation associated with the more difficult task in select frontal and temporal regions. Patients exhibited increased activation associated with direct gaze in temporal regions, which may relate to common symptoms.
AB - Objective: Earlier studies described gaze discrimination impairment in schizophrenia. The purpose of this study was to compare gaze discrimination abilities and associated brain activation in persons with stable schizophrenia and matched controls. Methods: 13 schizophrenia and 12 healthy participants underwent a gaze discrimination task with face stimuli rotated at 0, 4 and 8° deviation. During fMRI with BOLD imaging, subjects were asked to identify whether a face was making eye contact. Subject-level parameter estimates for BOLD signal change were entered into an orientation by group mixed effect repeated measures ANOVA. Results: Gaze discrimination performance did not differ between groups. Patients showed decreased activation in areas of bilateral inferior frontal and occipital areas, and select temporo-limbic regions, including amygdala. Groups differed by activation patterns according to gaze deviation. In controls, faces with 4° deviation produced higher activation in frontal and temporal regions. In patients, 0° deviation produced increased activation in amygdala and areas of temporal neocortex. Conclusions: Despite similar gaze discrimination abilities, schizophrenia patients exhibit decreased brain activation in areas associated with executive, emotional and visual processing. Controls exhibited increased activation associated with the more difficult task in select frontal and temporal regions. Patients exhibited increased activation associated with direct gaze in temporal regions, which may relate to common symptoms.
KW - Amygdala
KW - Faces
KW - Frontal lobe
KW - Gaze discrimination
KW - Schizophrenia
KW - fMRI
UR - http://www.scopus.com/inward/record.url?scp=39149087686&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=39149087686&partnerID=8YFLogxK
U2 - 10.1016/j.schres.2007.09.038
DO - 10.1016/j.schres.2007.09.038
M3 - Article
C2 - 18248794
AN - SCOPUS:39149087686
SN - 0920-9964
VL - 99
SP - 286
EP - 293
JO - Schizophrenia Research
JF - Schizophrenia Research
IS - 1-3
ER -