Hand deformity presennting as hyper-extension at the metcarpo phalaogeal joint and flexion at inter-phalanngeal joint, occurs due to paralysed
Interossei and lumbricalsflexes MCP (metacarpophallangeal joint) and extend IP (interphallangeal joint). Injury to interossei and lumbricals leads toclaw hand (extended MCP and flexed IP)
Flexor digitorum profundus
Lumbricals
Lumbricals and interossei
Extensor digitorum
NEET Jan 2020