Hand deformity presennting as hyper-extension at the metcarpo phalaogeal joint and flexion at inter-phalanngeal joint, occurs due to paralysed: (A) Flexor digitorum profundus, (B) Lumbricals, (C) Lumbricals and interossei, (D) Extensor digitorum
Answer is C. Interossei and lumbricalsflexes MCP (metacarpophallangeal joint) and extend IP (interphallangeal joint). Injury to interossei and lumbricals leads toclaw hand (extended MCP and flexed IP)