case_images: PMC9949737_01
case_images: Physical Examination Finding. Involuntary contractions causing flexion at the metacarpal phalangeal joint and extension at both interphalangeal joints.
case_images: cureus-0015-00000034150-i01.jpg
case_images: PMC9949737_01_cureus-0015-00000034150-i01.jpg
case_images: FIG1
case_images: When attempting to relax his hands he had involuntary contractions causing flexion of the fingers at the metacarpal phalangeal joint and extension at both interphalangeal joints (Figure 1).