A patient presented with the extension of the MCP joint and flexion of IP which muscle is affected
High-Yield Explanation
Extension of MCP and flexion of IP joints is due to palsy of lumbrical and interossei muscles Action of lumbricals = flexion of Mcp,,extension of IP Tnt Action of palmar interossei =adduction of fingers Action of dorsal interossei =abduction of fingers ref : BD CHAURASIA