brachial plexus and scalenes

neck muscles, muscles of the neck, sternocleidomastoid, neck, neck anatomy, neck muscles anatomy, muscles in the neck, muscles of neck, muscles in neck, trapezius, muscles of the neck and shoulder, muscles, muscles of the head and neck, head and neck muscles, muscles neck, neck and shoulder muscles, sternocleidomastoid muscle, levator scapulae, nerves in neck, splenius cervicis,