Arm and Forearm Muscles Flashcards
Triceps Brachii
Origin: infraglenoid tubercle (long head); posterior humerus (medial and lateral heads)
Insertion: Olecranon process of ulna
Innervation: Radial nerve
Anconeus
Origin: lateral epicondyle of humerus
Insertion: lateral aspect of the olecranon and superior aspect of the shaft of the ulna
Innervation: radial nerve
Biceps Brachii
Origin: supraglenoid tubercle (long head), coracoid process (short head) of scapula
Insertion: Tuberosity of radius
Innervation: musculocutaneous nerve
Brachialis
Origin: mid to distal humerus on either side of deltoid tuberosity
Insertion: Coronoid process of ulna (just distal to trochlear notch)
Innervation: musculocutaneous nerve
Brachioradialis
Origin: lateral supracondylar ridge of distal humerus
Insertion: Lateral aspect of distal radius, just superior to radial styloid process
Innervation: radial nerve
Pronator Teres
Origin: medial epicondlye of humerus and coronoid process of ulna
Insertion: antero-lateral aspect of radial shaft (mid-shaft)
Innervation: median nerve
Supinator
Origin: lateral epicondyle of humerus and ridge near radial notch of ulna
Insertion: proximal antero-lateral radius
Innervation: radial nerve
Flexor carpi radialis
Origin: medial epicondyle of humerus
Insertion: base of the 2nd and 3rd metacarpals
Innervation: medial nerve
Palmaris Longus
Origin: medial epicondyle of humerus
Insertion: flexor retinaculum and palmar aponeurosis
Innervation: median nerve
Flexor Carpi Ulnaris
Origin: medial epicondyle of humerus
Insertion: pisiform; hamate; base of 5th metacarpal
Innervation: ulnar nerve
Extensor carpi radialis longus
origin: lateral supracondylar ridge of humerus
Insertion: base of 2nd metacarpal
Innervation: radial nerve
Extensor Carpi Radialis Brevis
Origin: Lateral epicondyle of humerus
Insertion: base of 3rd metacarpal
Innervation: radial nerve
Extensor Carpi Ulnaris
Origin: Lateral epicondyle of humerus and posterior border of ulna
Insertion: base of 5th metacarpal (dorsal aspect)
Innervation: radial nerve
Elbow Extensors Muscles
Triceps Brachii
Anconeus
Elbow Flexors
Biceps Brachii
Brachialis
Brachioradialis (Pronator/supinator as well)
Forearm Action
Pronator teres
Supinator
Wrist flexors
Pronator Teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
Flexor Digitorum Superficialis
Flexor Digitorum Profundus
Wrist Extensors
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Flexor digitorum superficialis
Origin: medial epicondyle of humerus
Insertion: anterior margins of the bases of intermediate phalanges of digits 2-4
Innervation: median nerve
Flexor digitorum profundus
Origin: upper 3/4 of anterior/medial surfaces of body of the ulna; interosseous membrane
Insertion: base of distal phalanges of digits 2-4
Innervation: median nerve
