Glossary Investigation
Intrinsic tightness test
Also known as Bunnell test Finochietto-Bunnell test Bunnell intrinsic tightness test
Bunnell's test for tightness of the intrinsic muscles: passive flexion of the proximal interphalangeal joint is compared with the metacarpophalangeal joint held in extension and in flexion. Less proximal interphalangeal flexion with the metacarpophalangeal joint extended indicates tight intrinsics, because extension of that joint stretches the lumbrical and interosseous tendons; the reverse pattern indicates tight extrinsic extensors.