Anterior compartment of the forearm Flashcards
What is the general action of all the muscles in the anterior compartment of the forearm
Act as flexors
What nerve innervates most the anterior compartment of the arm
median nerve
What are the 5 muscles of the superficial muscles of the anterior forearm
- Flexor carpi radialis
- Flexor carpi ulnaris
- Flexor digitorum superficalis
- Palmaris longus
- Pronator teres
Where do all the superficial muscles of the forearm originate
the medial epicondyle of the humerus
What is the origin, insertion, action and innervation of Flexor carpi radialis
Origin: medial epicondyle of the humerus
Insertion: radial anterior hand metacarpals
Action: flexes hand at the wrist and radial deviation (abduction)
Innervation: median nerve
What is the origin, insertion, action and innervation of Flexor carpi ulnaris
Origin: Medial epicondyle of the humerus
Insertion: ulnar anterior of the hand carpals
Action: flexes hand at the wrist and ulnar deviation (adduction)
Innervation: ulnar nerve *outlier
What is the origin, insertion, action and innervation of Flexor digitorum superficalis
Origin: medial epicondyle of the humerus
Insertion: anterior middle phalanges (2-5 fingers)
Action: flexes fingers 2-5, (kung fu bring it finger wave) and flexes wrist
Innervation:
What is the origin, insertion, action and innervation of Palmaris longus
Origin: medial epicondyle of the humerus
Insertion: Connective tissue of the palm (flexor retinaculum and palmer aponeurosis)
Action: flexes hand an wrist and tightens palm (kid wave)
Innervation: median
What is the origin, insertion, action and innervation of Pronator teres
Origin: medial epicondyle of the humerus
Insertion: radius
Action: pronates forearm at the elbow
Innervation: median nerve
What are the 3 muscles of the deep muscles of the anterior forearm
- Flexor pollicis longus
- Flexor digitorum profundus
- Pronator quadratus
What is the origin, insertion, action and innervation of Flexor pollicis longus
Origin: radius and interosseous membrane
Insertion: distal phalanx of the tumb
Action: flexes thumb
Innervation: median nerve
What is the origin, insertion, action and innervation of Flexor digitorum profundus
Origin: ulna and interosseous membrane
Insertion: distal phalanx of 2-5 digits
Action: flexes fingers at distal phalanges (like your looking at your nails with fingers flexed)
Innervation: median nerve and ulnar nerve
What is the origin, insertion, action and innervation of Pronator quadratus
Origin: Distal Ulna
Insertion: Distal Radius
Action: pronates forearm at the wrist (radioulnar joint)
Innervation: median nerve
What are the 3 pronators
Brachioradialis, pronator teres, pronator quadratus
