Posterior Aspect of the Shoulder and Arm PDF
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Mehtap Tiryakioğlu
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Summary
The document provides detailed information on the posterior aspect of the shoulder and arm. It explains the various muscles and nerves involved and their respective functions. It also discusses the rotator cuff and its importance in maintaining the stability of the shoulder joint.
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POSTERIOR Prof Dr ASPECT OF THE Mehtap SHOULDER AND Tiryakioğlu ARM Cutaneous innervation Supraclavicular n (cervical plexus) Upper lateral...
POSTERIOR Prof Dr ASPECT OF THE Mehtap SHOULDER AND Tiryakioğlu ARM Cutaneous innervation Supraclavicular n (cervical plexus) Upper lateral cutaneous n of arm (axillary nerve) Medial cutaneous n of arm (brachial plexus) Posterior cutaneous n of arm (radial n.) Deep Fascia (deltoid fascia) Deltoid muscle Axillary n. C5,C6 Deltoid muscle (ant/clavicular part) O: Lat 1/3rd of clavicle I: Deltoid tuberosity F: Flexion&med rotation of arm Deltoid muscle (middle/acromial part) Chief abductor of arm Deltoid muscle (post/spinous part) Extension and lat rotation of arm Axillary n. C5,C6 Suprascapular n. C4,C5,C6 O: Supraspinous fossa I: Sup facet on greater tub Supraspinatus muscle Abducts humerus Infraspinatus muscle O: Infraspinous fossa Suprascapular n. C5,C6 I: Middle facet on greater tubercle Laterally rotates humerus Teres minor muscle O: Sup part of lat border of scapula I: Inferior facet on greater tubercle Axillary n. C5,C6 Laterally rotates humerus Teres major muscle O: Dorsal surface of inf angle of scapula I: Med lip of intertubercular groove Adducts and medially rotates humerus Lower Subscapular n. C6,C7 Subscapularis muscle Upper and lower subscapular n C5,C6,C7 O: Subscapular fossa I: Lesser tubercle of humerus Medially rotates humerus Anterior View *Muscles inserting to greater tubercle Supraspinatus suprascapular nerve İnfraspinatus suprascapular nerve Teres minor axillary nerve Rotator Cuff SITS Rotator Cuff S upraspinatus m. I nfraspinatus m. T eres minor m. S ubscapularis m. Rotator Cuff mm hold the head of humerus in the glenoid cavity. A tear in rotator cuff may result with dislocation of the shoulder joint Triceps brachii muscle Origin Long head: infroglenoid tubercle of scapula Lat head: post surface of humerus, sup to radial groove Med head: post surface of humerus, inf to radial groove I: olecranon and facia of forearm Extends forearm at the elbow jt Radial n. C6,C7,C8 Anconeus muscle O: post aspect of lat epicondyle of humerus I: lat surface of olecranon and sup part of post surface of ulna Abducts ulna during pronation of forearm.It also assists triceps during ext of forearm Radial n. C6,C7,C8
