Anatomy Muscles 400-425
Terms
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- Flexor Digitorum Superficialis origin and insertion
- origin: Medial epicondyle of humerus, coronoid process of ulna; shaft of radius; insertion: By four tendons into middle phalanges of fingers 2-5
- Deep action
- Action
- Deep innervation
- Nerve
- Flexor Carpi Ulnaris origin and insertion
- origin: Medial epicondyle of humerus, olecranon process, and posterior surface of ulna; insertion: Pisiform bone and base of fifth metacarpal
- Flexor Digitorum Superficialis action
- Flexes wrist and middle phalanges of fingers 2-5, the important finger flexor when speed and flexion against resistance are required.
- Flexor Digitorum Superficialis innervation
- Median nerve
- Palmaris Longus origin and insertion
- origin: Medial epicondyle of humerus; insertion: Palmar aponeurosis
- Flexor Carpi Ulnaris action
- Powerful flexor of wrist; also adducts hand in concert with extensor carpis ulnaris (posterior muscle); stabilizes wrist during finger extension
- Flexor Carpi Ulnaris innervation
- Ulna nerve
- Flexor Carpi Radialis origin and insertion
- origin: Medial epicondyle of humerus; insertion: Base of second and third metacarpals; insertion tendon easily seen and provides guide to position of radial artery (used for pulse taking) at wrist
- Palmaris Longus action
- Weak wrist flexor; may tense fascia of palm (palmar aponeurosis) during hand movements
- Palmaris Longus innervation
- Median nerve
- Pronator Teres origin and insertion
- origin: Medial epicondyle of humerus; coronoid process of ulna; insertion: By common tendon into lateral radius, midshaft
- Flexor Carpi Radialis action
- Powerful flexor of wrist; abducts hand; synergist of elbow flexion
- Flexor Carpi Radialis innervation
- Median nerve
- Superficial origin and insertion
- origin: Origin; insertion: Insertion
- Pronator Teres action
- Pronates forearm; weak flexor of elbow
- Pronator Teres innervation
- Median nerve
- Brachioradialis origin and insertion
- origin: Lateral supracondylar ridge at distal end of humerus; insertion: Base of styloid process of radius
- Superficial action
- Action
- Superficial innervation
- Nerve
- Brachialis origin and insertion
- origin: Front of distal humerus; embraces insertion of deltoid muscle; insertion: Coronoid process of ulna and capsule elbow joint
- Brachioradialis action
- Synergist in forearm flexion; acts to best advantage when forearm is partially flexed and semipronated; during rapid flexion and extension, acts to prevent joint separation
- Brachioradialis innervation
- Radial nerve
- Biceps brachii origin and insertion
- origin: Coracoid process (short head); Tubercle above glenoid cavity and lip of glenoid cavity (long head); Tendon of long head runs within capsule and descends into intertubercular groove of humerus; insertion: By common tendon into radial tuberosity