TY - JOUR
T1 - Brain activity during emotionally negative pictures in schizophrenia with and without flat affect
T2 - An fMRI study
AU - Fahim, Cherine
AU - Stip, Emmanuel
AU - Mancini-Marïe, Adham
AU - Mensour, Boualem
AU - Boulay, Luc J.
AU - Leroux, Jean Maxime
AU - Beaudoin, Gilles
AU - Bourgouin, Pierre
AU - Beauregard, Mario
N1 - Funding Information:
This work was supported by the Fonds de la recherche en santé du Québec (FRSQ) to E.S. and by a doctoral studentship from AstraZeneca pharmaceuticals to the first author. We thank Dr. Pierre Lalonde and all the subjects who participated in the study, and the staff of the Département de Radiologie, Centre Hospitalier de l'Université de Montréal (CHUM), Hôpital Notre-Dame, for their helpful technical assistance.
PY - 2005/10/30
Y1 - 2005/10/30
N2 - The aim of this functional magnetic resonance imaging (fMRI) study was to compare regional brain activity in schizophrenia subjects with (FA+) and without (FA-) flat affect during the viewing of emotionally negative pictures. Thirteen FA+ subjects and 11 FA- subjects were scanned while being presented with a series of emotionally negative and neutral pictures. Experientially, the viewing of the negative pictures induced a negative emotional state whose intensity was significantly greater in the FA- group than in the FA+ group. Neurally, the Negative minus Neutral contrast revealed, in the FA- group, significant loci of activation in the midbrain, pons, anterior cingulate cortex, insula, ventrolateral orbitofrontal cortex, anterior temporal pole, amygdala, medial prefrontal cortex, and extrastriate visual cortex. In the FA+ group, this contrast produced significant loci of activation in the midbrain, pons, anterior temporal pole, and extrastriate visual cortex. When the brain activity measured in the FA+ group was subtracted from that measured in the FA- group, only the lingual gyrus was significantly activated. Perhaps in FA+ subjects an amygdaloid malfunction rendered the amygdala unable to correctly evaluate the emotional meaning of the pictures presented, thus preventing effective connectivity linking the amygdala to the brain regions implicated in the physiological and experiential dimensions of emotion. Alternatively, a disturbance of effective connectivity in the neural networks linking the midbrain and the medial prefrontal system may have been responsible for the quasi absence of emotional reaction in FA+ subjects, and the abnormal functioning of the medial prefrontal cortex and anterior cingulate cortex in the FA+ group.
AB - The aim of this functional magnetic resonance imaging (fMRI) study was to compare regional brain activity in schizophrenia subjects with (FA+) and without (FA-) flat affect during the viewing of emotionally negative pictures. Thirteen FA+ subjects and 11 FA- subjects were scanned while being presented with a series of emotionally negative and neutral pictures. Experientially, the viewing of the negative pictures induced a negative emotional state whose intensity was significantly greater in the FA- group than in the FA+ group. Neurally, the Negative minus Neutral contrast revealed, in the FA- group, significant loci of activation in the midbrain, pons, anterior cingulate cortex, insula, ventrolateral orbitofrontal cortex, anterior temporal pole, amygdala, medial prefrontal cortex, and extrastriate visual cortex. In the FA+ group, this contrast produced significant loci of activation in the midbrain, pons, anterior temporal pole, and extrastriate visual cortex. When the brain activity measured in the FA+ group was subtracted from that measured in the FA- group, only the lingual gyrus was significantly activated. Perhaps in FA+ subjects an amygdaloid malfunction rendered the amygdala unable to correctly evaluate the emotional meaning of the pictures presented, thus preventing effective connectivity linking the amygdala to the brain regions implicated in the physiological and experiential dimensions of emotion. Alternatively, a disturbance of effective connectivity in the neural networks linking the midbrain and the medial prefrontal system may have been responsible for the quasi absence of emotional reaction in FA+ subjects, and the abnormal functioning of the medial prefrontal cortex and anterior cingulate cortex in the FA+ group.
KW - Emotions
KW - Flat affect
KW - Functional magnetic resonance imaging
KW - Schizophrenia
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U2 - 10.1016/j.pscychresns.2005.06.003
DO - 10.1016/j.pscychresns.2005.06.003
M3 - Article
C2 - 16143498
AN - SCOPUS:26644432051
SN - 0925-4927
VL - 140
SP - 1
EP - 15
JO - Psychiatry Research - Neuroimaging
JF - Psychiatry Research - Neuroimaging
IS - 1
ER -