Abstract
In cerbral palsy patients, muscles are hypertonic from childhood, and therefore strong continuous pressure is applied between the radial and carpal bones of the wrist joint.
We have treated 40 cerebral palsy patients (80 wrists) ranging in age from 15 to 46 years with a mean of 25.2 years.
Plain posteroanterior were taken of both wrists in all these patients regardless of their symptoms.
All wrists showed 25% of minus ulnar variance, and the radiolunate angle was -3.46±12.36, and showed a DISI pattern.
Scapholunate dissociation was observed in five wrists.
DISI pattern seems to have been caused by continuous pressure caused by extensors and flexors between the radial and carpal bones.
