<prompt> True about nerve injuries among following are:Froment sign seen in median nerve palsy is due to Flexor pollicis longus actionWaenburg sign is seen in median nerve palsyMedian nerve is also named as labourers nerveAll lumbricals are supplied by median nerve  <response>: Froment sign Fig a-normal, b- positive Seen in ulnar nerve palsy due to action of FPL which is supplied by median nerve. Waenberg sign c- normal, d- positive Seen in ulnar nerve palsy and not median nerve palsy so this option is wrong. It is caused by an unopposed action of the ulnar inseion of the extensor digiti minimiradial nerve innervation. It occurs due to paralysis of the palmar interosseous muscle that abducts the little finger. Only lateral two lumbricals are supplied by median nerve medial two lumbricals are supplied by ulnar nerve. 