Fill in the Blanks Intrinsic innervation of brachiiOnline version Innervation of only the brachii muscles by Grace Putnam 1 the axillary nerve is involved with the , and muscle s 2 The suprascapular nerve is involved with the and muscle s 3 the subscapular nerve is involved with the muscl e 4 the musculocutaneous nerve is involved with the , and muscle s 5 the radial nerve is involved with the , and muscle s