brachial plexus, spinal nerve contributions : 3 musketeers assassinated 5 rats, 5 mice, and 2 unicorns ; musculocutaneous (C5, C6, C7), axillary (C5, C6), radial (C5, C6, C7, C8, T1), median (C5, C6, C7, C8, T1), and ulnar (C8, T1) nerves.