18 juin 2017

Métabolisme du glucose cérébral régional et son association avec le phénotype et le fonctionnement cognitif chez les "patients" "avec autisme"

Aperçu: G.M.
Malgré trois décennies de neuroimagerie, nous sommes incapables de trouver une base anatomique ou pathophysiologique consistante et cohérente pour l'autisme. 
Les patients avec des résultats anormaux au de dépistage du PET avaient des scores significativement plus élevés sur le domaine de l'utilisation corporelle du CARS, ce qui indique plus de stéréotypies. 

Indian J Psychol Med. 2017 May-Jun;39(3):262-270. doi: 10.4103/0253-7176.207344.

Regional Cerebral Glucose Metabolism and its Association with Phenotype and Cognitive Functioning in Patients with Autism

Author information

Department of Psychiatry, Shridevi Institute of Medical Sciences and Research Hospital, Tumkur, Karnataka, India.
Department of Psychiatry, M. M. Institute of Medical Sciences and Research, Ambala, Haryana, India.
Department of Nuclear Medicine, PGIMER, Chandigarh, India.
Department of Psychiatry, PGIMER, Chandigarh, India.
Department of Anaesthesia and Pain Management, Max Super Speciality Hospital, Mohali, Punjab, India.



In spite of three decades of neuroimaging, we are unable to find consistent and coherent anatomical or pathophysiological basis for autism as changes are subtle and there are no studies from India.


To study the regional cerebral glucose metabolism in children with autism using positron emission tomography (PET) scan and to study the behavior and cognitive functioning among them.


Ten subjects (8-19 years) meeting Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition criteria for autism were evaluated on Childhood Autism Rating Scale (CARS), trail making test (TMT) A and B, Wisconsin card sorting test, Raven's progressive matrices, and PET scan. A control group of 15 matched subjects without any brain pathology or neurological disorder was similarly studied.


Four out of the ten patients with autism had abnormal PET scan findings, and in contrast, none of the patients in the control group had abnormal PET scan. Of the four patients with abnormality in the PET scan, two patients had findings suggestive of hypometabolism in cerebellum bilaterally; one patient showed bilateral hypometabolism in anterior temporal cortices and cerebellum, and the fourth patient had hypermetabolism in the bilateral frontal cortices and medial occipital cortices. Subjects with autism performed poorly on neuropsychological testing. Patients with abnormal PET scan findings had significantly higher scores on the "body use" domain of CARS indicating more stereotypy.


Findings of this study support the view of altered brain functioning in subjects with autism

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