<prompt> what happens in Klumpkes paralysisWater tip deformityIntrinsic hand muscle weaknessElbow extended and wrist extendedOnly elbow is extended  <response>: Klumpke;s paralysis site of injury - lower trunk of brachial plexus C8,T1 cause of injury - undue abduction of the arm, as in clutching something with the hand after a fall from height , sometimes in bih injury . Muscles paralysed- intrinsic muscle of hand T1, ulnar flexors of wrist fingers C8 deformity - claw hand due to unopposed action of long flexors extensors of the fingers . In claw hand there is hyperextension at metacarpophalageal joint flexion at the interphalangeal joints. REF:textbook of ohopedics, John Ebenezer, 4th edition ,pg.no.351 