The Clavicle Right clavicle Deltoid tubercle: Conoid tubercle, conoid ligamen Impression for the

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1 The Clavicle Muscle Attachment Sites in the Upper Limb Pectoralis major Right clavicle Smooth superior surface of the shaft, under the platysma muscle tubercle: attachment of the deltoid Acromial facet Sternal facet Sternocleidomastoid Trapezius Sternocleidomastoid and Trapezius innervated by the Spinal Accessory nerve Conoid tubercle, attachment of the conoid ligament which is the medial part of the coracoclavicular ligament Conoid ligament Costoclavicular ligament Acromial facet Impression for the costoclavicular ligament which binds the clavicle to the first rib Subclavian groove: site of attachment of the subclavius muscle Subclavius Innervated by Nerve to Subclavius Trapezoid line, attachment of the trapezoid ligament which is the lateral part of the coracoclavicular ligament Trapezoid ligament

2 The Scapula Right scapula: posterior Trapezius Rhomboid minor Levator Scapulae, Rhomboid minor and Rhomboid Major are innervated by the Dorsal Scapular Nerve Levator scapulae Supraspinatus Supraspinatus and Infraspinatus innervated by the Suprascapular nerve Infraspinatus Long head of triceps and Teres Minor are innervated by the Rhomboid major Teres Minor Latissimus dorsi Latissimus dorsi innervated by the Thoracodorsal nerve Teres Major Teres Major innervated by Lower Subscapular Nerve Right scapula: anterior Pectoralis minor Innervated by the medial pectoral nerve Biceps brachii: short head Coracobrachialis and Biceps Brachii are innervated by the Coracobrachialis Serratus anterior Serratus anterior is innervated by the Long Thoracic nerve Subscapularis Subscapularis innervated by the Upper and lower Subscapular nerves Long head of triceps Innervated by the

3 The Humerus Right Humerus: anterior Supraspinatus (greater tubercle) Suprascapular nerve Subscapularis (lesser tubercle) Upper and lower Subscapular nerves Teres minor Right Humerus: posterior Infraspinatus (greater tuberosity Suprascapular nerve The bicipital groove Covered by the transverse ligament Latissimus dorsi Thoracodorsal nerve Teres major Lower Subscapular Nerve Triceps brachii: Lateral head Pectoralis major Innervated by the Lateral and medial pectoral nerves Coracobrachialis All heads of the triceps are innervated by the Triceps brachii: Medial head Brachioradialis Brachialis Extensor carpi radialis longus (Radial Nerve) Pronator teres Median nerve Flexor carpi ulnaris Ulnar nerve Anconeus radial nerve Common extensor origin: - Extensor carpi radialis brevis (deep branch of the radial nerve) - Extensor digitorum - Extensor digiti minimi - Extensor carpi ulnaris - - Common flexor origin: - Flexor carpi radialis - Palmaris longus - Humeroulnar head of the FLEXOR DIGITORUM SUPERFICIALIS -

4 The Radius and Ulna: Flexor compartment Brachialis radial nerve; actually a part of the extensor compartment Flexor digitorum superficialis Pronator teres Flexor pollicis longus Anterior interosseous nerve Biceps brachii Flexor digitorum profundis Radial half innervated by the Median nerve Ulnar Half innervated by the ulnar nerve Flexor digitorum superficialis Pronator teres: the ulnar head originates here innervated by the Median nerve Flexor carpii ulnaris Ulnar head originates here Innervated by the Ulnar nerve Brachioradialis Pronator quadratus ORIGINATES at the ULNA INSERTS into the RADIUS

5 The Radius and Ulna: dorsal surface Triceps brachii Anconeus radial nerve radial nerve Abductor pollicis longus Pronator teres Extensor pollicis longus Posterior oblique line Extensor pollicis brevis Extensor indices

6 The carpus and hand: palmar surface Flexor digitorum superficialis (Median nerve index and middle finger) (Ulnar nerve ring and pinky fingers) Inserts into the distal phalanges Adductor pollices Flexor digitorum superficialis Inserts into the middle phalanges Flexor digiti minimi brevis Flexor pollicis longus Abductor digit minimi Opponens digit minimi Flexor pollicis longus (Anterior interosseous nerve) Flexor pollicis brevis (recurrent branch of Median nerve) Abductor pollicis brevis (recurrent branch of Median nerve) Opponens pollicis (recurrent branch of Median nerve) Flexor carpii ulnaris Unique among anterior compartment muscles because it is WHOLELY innervated by the Ulnar nerve Abductor digit minimi Abductor pollicis longus (recurrent branch of Median nerve) Flexor Carpi radialis Palmaris longus Inserts into the flexor retinaculum Opponens pollicis brevis, abductor pollicis brevis and flexor pollicis brevis all originate from the flexor retinaculum

7 The carpus and hand: dorsal surface Extensor indices Extensor digitorum Extensor digit minimi Extensor carpi radialis longus (radial nerve) Extensor pollicis longus Extensor carpi radialis brevis radial nerve Extensor pollicis brevis Dorsal interossei ulnar nerve Extensor carpi ulnaris radial nerve Abductor pollicis longus