The FrontalCortex question bank can help you study for the USMLE.

Flexor Pollicis Brevis

Last updated on Monday, April 27 2009 by blondarb

peer review status unavailable
rating unavailable

Muscle Name: flexor pollicis brevis

AKA:  musculus flexor pollicis brevis

Abbreviation: FPB

Spinal Nerve Roots:

Brachial Plexus Trunks:
    lower trunk

Brachial Plexus Cords:
    medial cord

Named Nerves:
    median nerve
    ulnar nerve

Proximal Attachment:  trapezoid, flexor retinaculum

Distal Attachment:  thumb, proximal phalanx

Action:  Flexes the thumb at the first metacarpophalangeal joint

Needle Insertion:  In the medial aspect of the thenar eminince.

Activation for EMG:  Flex the thumb at the metacarpophalangeal  (MCP) joint.