muscle: abductor pollicis brevis

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Muskeln Flexor carpi ulnaris Flexor digitorum superficialis Palmaris brevis Abductor digiti minimi Flexor digiti minimi brevis Lumbricales Flexor digitorum profundus (Sehne) Flexor digitorum superficialis Flexor carpi radialis Palmaris longus Opponens pollicis Abductor pollicis transversus Flexor pollicis brevis Adduktor pollicis brevis

M. abductor pollicis brevis

the short thumb abductor located in the thenar. In contrast to the abductor pollicis longus muscle, which abducts the thumb radially, the abductor pollicis brevis abducts the thumb palmarwards.
Origin: tuberculum ossis scaphoidei and retinaculum flexorum
Attachment: radial sesamoid bone and proximal phalanx of the thumb
Innervation: Nervus medianus from Plexus brachialis from C8 and Th1
Antagonists:
Movement: Abduction of the thumb towards the palmar side