Muscles paralysed in Erb's paralys are all except?
Ans. is 'b' i.e., Triceps Erb's paralysis One region of upper trunk (C5, C6) of the brachial plexus is called Erb's point where six nerves meet. o Injury at this point results in Erb's paralysis The injury is due to undue separation of the head from the shoulder, which may be seen in : ? Bih injury Fall on the shoulder During Anesthesia Clinical features of Erb's palsy Muscles paralysed : Mainly biceps brachii, deltoid, branchialis and brachioradialis. Paly supraspinatus, infraspinatus and supinator. Deformity (position of the limb) Arm : Hanges by the side; it is adducted and medially rotated Forearm : Extended and pronated The deformity is known as 'policeman's tip hand' or 'poer's tip hand'. Disability : The following movements are lost. Abduction and lateral rotation of the arm (shoulder). Flexion and supination of the forearm. Biceps and supinator jerks are lost. Sensations are lost over a small area over the lower pa of the deltoid
Biceps
Triceps
Brachioradialis
Brachiali