Flexor Muscles of the Forearm
Are any of the flexor muscles of the forearm innervated by the radial nerve?
NO
way to remember pronator quadratus origin and insertion?
OU IR "OUiR muscle" O = Origin U = Ulna i = insertion R = Radius
Which muscles originate at the medial epicondyle of the humerus? Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis
Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris *all muscles except for the flexor digitorum superficialis
Name the anterior flexor muscles of the forearm. (5 muscles)
Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis
Which muscles are innervated by the median nerve? Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis
Pronator teres Flexor carpi radialis Palmaris longus Flexor digitorum superficialis * all except : Flexor carpi ulnaris
What is the innervation for the following deep, flexor muscles? Flexor digitorum profundus Flexor pollicis longus Pronator quadratus
anterior interosseous branch of median nerve* *with an exception for Flexor digitorum profundus
flexor pollicis longus origin
anterior surface of radius and interosseous membrane
flexor carpi radialis insertion
base of 2nd and 3rd metacarpals
flexor pollicis longus insertion
base of distal phalanx of thumb
flexor digitorum profundus insertion
bases of distal phalanges of digits 2-5
Flexor digitorum superficialis insertion
bases of middle phalanges of digits 2-5
pronator quadratus insertion
distal 1/4 of anterior surface of RADIUS
Flexor carpi radialis action
flexes and abducts wrist
Pronator teres action
flexes elbow and pronates forearm
flexor pollicis longus action
flexes thumb (first digit)
Flexor carpi ulnaris action
flexes wrist and adducts hand
flexor digitorum profundus action
flexion of digits 2-5 at DIP joints flexion of digits 2-5 at PIP joints flexion of digits 2-5 at MCP joints flexion of wrist
Palmaris longus insertion
flexor retinaculum and palmar aponeurosis
Pronator teres insertion
lateral surface of radius
flexor carpi ulnaris insertion
pisiform, hook of hamate, base of 5th metacarpal
pronator quadratus action
pronates forearm *think of pronates like playing PRO basketball; dribble ball etc
What is the innervation except for Flexor digitorum profundus?
the LATERAL aspect IS innervated by the anterior interosseous branch of the median nerve, HOWEVER, the MEDIAL aspect is innervated by the Ulnar nerve
flexor digitorum profundus origin
Anterior and medial surfaces of proximal 3/4 of ulna
What are the roots of the anterior interosseous branch of the median nerve?
C8, T1
pronator quadratus origin
Distal 1/4 of anterior surface of ULNA
Palmaris longus action
Flexes wrist and tenses palmar aponeurosis
flexor digitorum superficialis action
Flexion of digits 2-5 at MCP joints Flexion of digits 2-5 at PIP joints Flexion of wrist
What muscles are innervated by the ulnar nerve? Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis
Flexor carpi ulnaris
What muscle is the only intermediate flexor muscle of the forearm?
Flexor digitorum superficialis
Where does the flexor digitorum superficialis originate?
The proximal 2/3 of the medial & anterior surface of ulna & interosseous membrane
