In brachial plexus nerve arising from root is
Nerve to serratus anterior
Axillary nerve
Ulnar nerve
Suprascapular nerve
Nerve to serratus anterior or long thoracic nerve arises from the nerve root of C5-C7. Injury to this nerve causes the condition called winging of scapula due to paralysis of serratus anterior muscle. B D Chaurasia 7th edition Page no: 45
Upper limb