"origin: posterior surface of distal radial shaft and interosseous membrane"
"insertion: dorsal surface base of the proximal phalanx of the thumb"
"action: extends the thumb at metacarpophalangeal joint"
"arterial supply: posterior interosseous artery"
"arterial supply: posterior interosseous artery"
"innervation: posterior interosseous nerve (C7 and C8), a continuation of the deep branch of the radial nerve (C7, C8)"
"innervation: posterior interosseous nerve (C7 and C8), a continuation of the deep branch of the radial nerve (C7, C8)"
Expected headings
"Summary"