Page 326 - Kinesiology of the musculoskeletal system foundations for physical rehabilitation

302 Section II Upper Extremity Distal attachments: coronoid process and tuberosity on the
proximal ulna
Subscapularis
Proximal attachment: subscapular fossa Innervation: musculocutaneous nerve (small contribution
Distal attachment: lesser tubercle of the humerus; part of the from the radial nerve)

capsule of the glenohumeral joint Brachioradialis
Innervation: upper and lower subscapular nerves Proximal attachment: upper two thirds of the lateral supracon-

Supraspinatus dylar ridge of the humerus
Proximal attachment: supraspinatus fossa Distal attachment: near styloid process at the distal radius
Distal attachment: upper facet of the greater tubercle of the Innervation: radial nerve

humerus; part of the capsule of the glenohumeral joint Pronator Teres
Innervation: suprascapular nerve Proximal attachments:
Humeral head: medial epicondyle
Teres Major Ulnar head: medial to the tuberosity of the ulna
Proximal attachment: inferior angle of the scapula Distal attachment: lateral surface of the middle radius
Distal attachment: crest of the lesser tubercle of the humerus Innervation: median nerve
Innervation: lower subscapular nerve
Pronator Quadratus
Teres Minor Proximal attachment: anterior surface of the distal ulna
Proximal attachment: posterior surface of the lateral border of Distal attachment: anterior surface of the distal radius
Innervation: median nerve
the scapula
Distal attachment: lower facet of the greater tubercle of the Supinator
Proximal attachments: lateral epicondyle of the humerus,
humerus; part of the capsule of the glenohumeral joint
Innervation: axillary nerve radial collateral and annular ligaments, and supinator crest
of the ulna
Trapezius Distal attachment: lateral surface of the proximal radius
Proximal attachments (all parts): medial part of superior nuchal Innervation: radial nerve

line and external occipital protuberance, ligamentum Triceps Brachii
nuchae, spinous processes and supraspinous ligaments of Proximal attachments:
the seventh cervical vertebra and all thoracic vertebrae Long head: infraglenoid tubercle of the scapula
Distal attachments: Lateral head: posterior humerus, superior and lateral to the
Upper part: posterior-superior edge of the lateral one third of
the clavicle radial groove
Middle part: medial margin of the acromion and upper lip Medial head: posterior humerus, inferior and medial to the
of the spine of the scapula
Lower part: medial end of the spine of the scapula, just lateral radial groove
to the root Distal attachment: olecranon process of the ulna
Innervation: primarily by the spinal accessory nerve (cranial Innervation: radial nerve
nerve XI); secondary innervation directly from ventral
rami of C2-C4 WRIST MUSCULATURE

ELBOW AND FOREARM MUSCULATURE Extensor Carpi Radialis Brevis
Proximal attachment: common extensor-supinator tendon
Anconeus
Proximal attachment: posterior side of the lateral epicondyle attaching to the lateral epicondyle of the humerus
Distal attachment: radial-posterior surface of the base of the
of the humerus
Distal attachment: between the olecranon process and proxi- third metacarpal
Innervation: radial nerve
mal surface of the posterior side of the ulna
Innervation: radial nerve Extensor Carpi Radialis Longus
Proximal attachments: common extensor-supinator tendon
Biceps Brachii
Proximal attachments: attaching to the lateral epicondyle of the humerus and the
Long head: supraglenoid tubercle of the scapula distal part of the lateral supracondylar ridge of the humerus
Short head: apex of the coracoid process of the scapula Distal attachment: radial-posterior surface of the base of the
Distal attachments: bicipital tuberosity of the radius; also to second metacarpal
Innervation: radial nerve
deep connective tissue within the forearm via the fibrous
lacertus Extensor Carpi Ulnaris
Innervation: musculocutaneous nerve Proximal attachments: common extensor-supinator tendon

Brachialis attaching to the lateral epicondyle of the humerus and the
Proximal attachment: distal aspect of the anterior surface of posterior border of the middle one third of the ulna

the humerus