Flexors
This superficial flexor is absent in some people and inserts into the palmar aponeurosis.
Palmaris longus
This muscle extends the index finger independently.
Extensor indicis
Most forearm flexors are innervated by this nerve.
Median nerve
Name the two muscles responsible for pronation of the forearm.
Pronator teres and pronator quadratus
This ligament is responsible for stabilizing the radioulnar joint.
Annular ligament
This flexor inserts on the base of the 5th metacarpal.
Flexor carpi ulnaris
This muscle specifically extends the 5th digit.
Extensor digiti minimi
This nerve innervates flexor carpi ulnaris.
Ulnar nerve
Ulnar deviation (helps us grasp stuff)
Pisiform is contained in the tendon of this muscle.
FCU
This muscle flexes digits 2–5 at the MCP and PIP joints but cannot flex the DIP.
Flexor digitorum superficialis
This muscle extends digits 2–5 at the MCP joints and also assists with wrist extension.
Extensor digitorum
This nerve innervates all dorsal forearm muscles
Radial nerve
These muscles are responsible for digit flexion.
FPL, FDS, FDP
Proximal attachment of extensor carpi radialis longus
lateral supraepicondylar ridge of humerus
These muscles make up the deep layer.
FDP, FPL, PQ
These muscles extend the wrist and contribute to radial deviation
Extensor carpi radialis longus & brevis
This is the ONLY forearm flexor innervated by the radial nerve.
Brachioradialis
These muscles are responsible for ulnar deviation
FCU, ECU
These are known as the "outcropper muscles"
Abductor Pollicis Longus, Extensor Pollicis Brevis, Extensor Pollicis Longus
This deep flexor muscle has dual innervation.
Flexor digitorum profundus
This muscle forms the medial border of the anatomical snuffbox.
Extensor pollicis longus
This branch of the median nerve innervates FPL and PQ.
Anterior interosseous nerve
These muscles are responsible for radial deviation.
FCR, ECRL, ECRB
This structure is the roof of the carpal tunnel and prevents bowstringing of the flexor muscles.
Flexor retinaculum