Flexion of metacarpophalangeal joint is produced by all except: (A) Lumbricals, (B) Dorsal interossei, (C) Palmar interossei, (D) Extensor pollicus longus
Answer is D. Flexion of metacarpophalangeal joint is by lumbricals and both palmar and dorsal interossei. Abduction is by the action of dorsal interossei. Adduction is by the actions of palmar interossei . B D Chaurasia 7th edition Page no: 163