Distractors
Extensor pollicis longus muscle and the extensor pollicis brevis muscle
Abductor pollicis brevis muscle and the flexor pollicis brevis muscle
Extensor pollicis brevis muscle and the flexor pollicis brevis muscle
Key
First dorsal interosseous muscle and the opponens pollicis muscle
Question
In "Carpometacarpal Joint Arthritis," author Lynette Lombardo says the two most stabilizing muscles of the thumb are: