[[Dorsal posterior sacrococcygeus muscle

M. sacrococcygeus dorsalis. Rudimentary remnant of coccygeal musculature passing posteriorly from the sacrum to the coccyx. A

5 MUSCLES OF THE UPPER LIMB. Musculi mem-bri superioris.

6 M. deltoideus. o: Spine of scapula, acromion clavicle. i: Deltoid tuberosity of humerus. A: Lateral and medial rotation, abduction, adduction, forward and backward flexion. I: Axillary nerve. B E F G

7 M. supraspinatus. o: Supraspinous fossa. i: Greater tubercle of humerus. A: Abduction, medial and lateral rotation. I: Suprascapular nerve. B EFG

8 M. infraspinatus. o: Infraspinous fossa. i: Greatertubercle ofhumerus. A: Lateral rotation. I: Suprascapular nerve. B F G

9 M. teres minor. o: Beside the infraspinatus muscle. i: Greater tubercle. A: Lateral rotation and weak adduction. I: Axillary nerve. B F G

10 M. teres major. o: Lateral margin of scapula. i: Crest of lesser tubercle. A: Medial rotation and adduction with dorsiflexion of arm. I: Subscapu-lar nerve. B D E G

11 M. subscapulars. o: Subscapular fossa. i: Lesser tubercle. Medial rotation of arm. I: Subscapular nerve. C D E

12 M. biceps brachii. Two-headed upper arm muscle with the three parts described below (nos. 13-15). i: Radial tuberosity and ulna via the bicipital aponeurosis. A: Flexion and supination of the elbow joint. I: Musculocutaneous nerve. D

13 Long head of biceps. Caput longum. o: Su-praglenoid tubercle. i: Radial tuberosity and ulna. A: Flexion and supination of the elbow joint, weak abduction of the shoulder joint. C D

14 Intertubercular tendon sheath. Vagina tendinis intertubercularis. Synovial sheath for the tendon of the long head of the biceps in the intertubercular groove. D

15 Short head of biceps. Caputbreve.o: Coracoid process. i: Radial tuberosity of ulna. A: Flexion of the elbow joint and supination, forward flexion of the arm at the shoulder joint. C D

16 Bicipital aponeurosis. Aponeurosis m. bici-pitis brachii (aponeurosis bicipitalis) [[lacertus fibrosus]]. Medial expansion of the biceps tendon that attaches to the forearm fascia. A: Transmits the pull of the biceps to the ulna when the arm is supinated. D

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