Name: Opponens Pollicis, Alternative Site
Action: Flexes the metacarpal bone of the thumb.
Innervation: Lateral terminal branch of the median nerve, C8 and T1 (primary), and commonly a ramus of the deep terminal branch of the ulnar nerve.
Note: This site, along with other muscles of the distal extremities, has been found to be optimal for tceMEPs. Additional muscle groups may be monitored to provide added information, but the data is generally considered to be less reliable.
