20 Pectoral Girdle Fractures Anatomy of the Pectoral Girdle Shoulder Bones and Ligaments Clavicle Clavicle • Parts and landmarks: sternal end/facet, impression for costoclavicular ligament, shaft (body), conoid tubercle, trapezoid line, subclavian groove, acromial end/facet Scapula • Parts: glenoid fossa (cavity) supraglenoid tubercle, infraglenoid tubercle, neck, coracoid process, suprascapular notch, superior border, superior angle, medial border, inferior angle, lateral border, subscapular fossa, spine, acromion, supraspinous fossa, infraspinous fossa Pectoral Girdle and Shoulder Joints • Sternoclavicular joint Synovial, with articular disc (dual axes of movement) Extremely strong: only joint attaching upper-limb girdle to the axial skeleton • Acromioclavicular (AC) joint Synovial, gliding/plane Supported by acromioclavicular ligament Acts as a pivot point to increase range of arm motion (raise arm over head) • Glenohumeral joint (also covered in Chapter 21, Humerus Fractures) Synovial, ball and socket with labrum Basis for upper limb positioning and transmission of forces to pectoral girdle Involved in glenoid fractures (intraarticular) Biceps (long) tendon inserts on supraglenoid tubercle Triceps (long) tendon inserts on infraglenoid tubercle Ligaments • Coracoclavicular ligament Very strong, two-part Shares forces between clavicle and scapula Trapezoid: nearly horizontal, attaches to conoid tubercle and superior surface of coracoid Conoid: nearly vertical inverted triangle, attaches to coracoid root Parts may be separated by bursa. Base for supporting scapula and upper limb on the clavicular “strut” • Acromioclavicular ligament: strengthens AC joint superiorly Only gold members can continue reading. Log In or Register to continue Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Like this:Like Loading... Related Related posts: Uterus and Adnexal Diseases Prostate Diseases Small Intestine Diseases Liver Diseases Stay updated, free articles. Join our Telegram channel Join Tags: Netters Surgical Anatomy Review PRN Aug 12, 2016 | Posted by admin in ANATOMY | Comments Off on Pectoral Girdle Fractures Full access? Get Clinical Tree
20 Pectoral Girdle Fractures Anatomy of the Pectoral Girdle Shoulder Bones and Ligaments Clavicle Clavicle • Parts and landmarks: sternal end/facet, impression for costoclavicular ligament, shaft (body), conoid tubercle, trapezoid line, subclavian groove, acromial end/facet Scapula • Parts: glenoid fossa (cavity) supraglenoid tubercle, infraglenoid tubercle, neck, coracoid process, suprascapular notch, superior border, superior angle, medial border, inferior angle, lateral border, subscapular fossa, spine, acromion, supraspinous fossa, infraspinous fossa Pectoral Girdle and Shoulder Joints • Sternoclavicular joint Synovial, with articular disc (dual axes of movement) Extremely strong: only joint attaching upper-limb girdle to the axial skeleton • Acromioclavicular (AC) joint Synovial, gliding/plane Supported by acromioclavicular ligament Acts as a pivot point to increase range of arm motion (raise arm over head) • Glenohumeral joint (also covered in Chapter 21, Humerus Fractures) Synovial, ball and socket with labrum Basis for upper limb positioning and transmission of forces to pectoral girdle Involved in glenoid fractures (intraarticular) Biceps (long) tendon inserts on supraglenoid tubercle Triceps (long) tendon inserts on infraglenoid tubercle Ligaments • Coracoclavicular ligament Very strong, two-part Shares forces between clavicle and scapula Trapezoid: nearly horizontal, attaches to conoid tubercle and superior surface of coracoid Conoid: nearly vertical inverted triangle, attaches to coracoid root Parts may be separated by bursa. Base for supporting scapula and upper limb on the clavicular “strut” • Acromioclavicular ligament: strengthens AC joint superiorly Only gold members can continue reading. Log In or Register to continue Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Like this:Like Loading... Related Related posts: Uterus and Adnexal Diseases Prostate Diseases Small Intestine Diseases Liver Diseases Stay updated, free articles. Join our Telegram channel Join Tags: Netters Surgical Anatomy Review PRN Aug 12, 2016 | Posted by admin in ANATOMY | Comments Off on Pectoral Girdle Fractures Full access? Get Clinical Tree
