Adolescent idiopathic scoliosis and cerebral asymmetry. An examination of a nonspinal perceptual system.
METHODS
This study analyzed the asymmetry of a nonspinal sensory system, comparing healthy children and those with adolescent idiopathic scoliosis.


OBJECTIVE
To test the hypothesis that differences in neurologic functioning that have been observed in idiopathic scoliosis are confined to motor organization and that the etiology thus is a defect solely of the motor cortex.


BACKGROUND
Recent reports associating scoliosis convexity with equilibrium control, central processing, handedness, and motor lateralization have suggested that idiopathic scoliosis is connected causally with the motor cortex.


METHODS
Dichotic listening tests were performed on 20 healthy children and 31 children with adolescent idiopathic scoliosis. This tests perceptual asymmetry, and thus the organization of cognitive processing in the brain, a higher function that is not associated with posture or motor function.


RESULTS
Subjects with scoliosis were significantly more lateralized for linguistic processing than the control group, indicating they had a greater degree of left-right asymmetry throughout their cortical organization.


CONCLUSIONS
In adolescent idiopathic scoliosis, the organization of the entire brain was more strongly lateralized than in subjects without scoliosis. It is unlikely that this caused or was caused by the spinal curvature. Subjects with adolescent idiopathic scoliosis showed generalized asymmetry of many functions and structures. An examination at the level of morphology and development is proposed.
D000293:Adolescent; D000328:Adult; D002648:Child; D003071:Cognition / Q000502:physiology*; D004007:Dichotic Listening Tests; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D009044:Motor Cortex / Q000503:physiopathology*; D012600:Scoliosis / Q000503:physiopathology*