<prompt> Erbs paralysis involves -C5C6C8T1T1T2None  <response>: Ans. is a i.e., C5 C6ERBS PARALYSISo One region of upper trunk C? CJ of the brachial plexus is called Erb is point where six nerv es meet.Erbs pointo Injury at this point results in Erbs paralysis.o The injury is due to undue separation of the head from the shoulder, which may be seen in : -i Birth injuryii Fall on the shoulderiii During AnesthesiaClinical features of Erbs palsyMuscles paralysed : Mainly biceps brachii, deltoid, branchialis and brachioradialis. Partly supraspinatus, infraspinatus and supinator. Deformity position of the limbArm . Hanges by the side: it is adducted and medially rotatedForearm : Extended and pronatedThe deformity is known as policemans tip hand or porters tip hand.C Disability: The following movements are lost.o Abduction and lateral rotation of the arm shoulder.o Flexion and supination of the forearm.o Biceps and supinator jerks are lost.o Sensations are lost over a small area over the lower part of the deltoid. 