The lower plexus innervates the opponens pollicis and abductor pollicis brevis.
Wilbourn
A J
AJ
Cherington
M
M
D004576:Electromyography; D006801:Humans; D008475:Median Nerve / Q000033:anatomy & histology* / Q000503:physiopathology*; D018482:Muscle, Skeletal / Q000294:innervation*; D009431:Neural Conduction; D013126:Spinal Nerve Roots / Q000033:anatomy & histology*