What are root values of nerve supplying muscle needed for latter pa of the following action?
Serratus Anterior is responsible for the latter pa of abduction along with trapezius. The long thoracic nerve (Nerve of Bell) originates from the C5-C7 roots and descends in the axilla, posterior to the brachial plexus, to innervate the serratus anterior muscle.
C7, C8
C8, T1
C5, C6
C5, C6, C7
Upper Limb and Lower Limb