- See:
-
Intrinsic Muscles:
- Discussion:
- results from intrisic stiffness (contracture);
-
specific causes:
- truama:
- posttraumatic intrinsic contractures may occur after severe injuries to hand
that have resulted in considerable edema or hematoma;
- ischemia
-
rheumatoid arthritis
-
Still's disease
- mycobacterium leprae
- CNS lesions
- Parkinson's disease
-
cerebral palsy
- Exam:
-
Bunnel test:
- early
intrinsic extensor tightness of the PIP joint;
- stiffness, tightness of fingers on grasp;
- full flexion possible when MCP fully flexed;
- Treatment:
- corrected with therapy, or if that fails, sometimes by intrinsic
release/transfer (Little - distal) or (Zancolli - proximal);
- late deformity:
- distal intrinsiic releae of those oblique fibers contributing to lateral bands, preserving
more proximal transverse contribution of interosseous aponeurotic expansion;
