Scapula - learning objs

Question 1

Deltoid

Answer 1

• attachments: clavicle, acromion, and spine of scapula to deltoid tuberosity of the humerus
• actions: flexion and medial rotation, abduction, extension and lateral rotation, horizontal extension of humerus
• innervation: C5-6, axillary nerve

Question 2

Supraspinatus

Answer 2

• attachments: medial supraspinous fossa to superior facet of the greater tubercle of tubercle of humerus to shoulder joint capsule
• actions: humeral abduction and laterally rotates humerus, stabilizes glenohumeral joint
• innvervation: C4-6, suprascapular nerve

Question 3

Infraspinatus

Answer 3

• attachments: infraspinous fossa to middle facet of greater tubercle of humerus and shoulder joint capsule
• actions: lateral rotation of humerus, stabilizes glenohumeral joint
• innervation: C5-6, suprascapular nerve

Question 4

Teres minor

Answer 4

• attachments: dorsal surface of lateral border of scapula to the inferior facet of the greater tubercle of the humerus and to shoulder joint capsule
• actions: lateral rotation of humerus, stabilizes glenohumeral joint
• innvervation: C5-6, axillary nerve

Question 5

Subscapularis

Answer 5

• attachments: subscapular fossa to lesser tubercle of humerus
• actions: medial rotation of huermus, stabilizes glenohumeral joint
• innervation: C5-6, upper and lower subscapular nerves

Question 6

Teres major

Answer 6

• attachments: dorsal surface of the inferior angle of scapula and lower lateral border of teh scapula to the intertubercular sulcus of the humerus
• actions: humeral adduction, medial rotation and extension
• innervation: C5-6, lower subscapular nerve

Question 7

Anastomoses of scapula

Answer 7

Question 8

Quadrangular Space - NV contents

Answer 8

• borders: teres major, shaft of humerus, teres major, shaft of humerus
• contents: axillary nerve, posterior circumflex humeral artery

Question 9

Medial border of scapula - NV contents

Answer 9

• location: medial border of scapula
• contents: dorsal scapular nerve and artery

Question 10

Scapular notch - NV contents

Answer 10

• location: medial superior border of scapula, closed by transverse scapular ligament
• contents: suprascapular artery runs outside ligament and suprascapular nerve runs under ligament

Question 11

Triangular sapce - NV contents

Answer 11

• location: teres major, teres minor and long head of triceps brachii
• contents: circumflex scapular artery

Question 12

Triceps hiatus - NV contents

Answer 12

• location: teres major, long head of triceps brachii, shaft of humerus
• contents: radial nerve and profunda brachii artery

Question 13

Shoulder separation

Answer 13

• A hard Fall On an OutStretched Hand (FOOSH) - landing on shoulder
• AC and coracoclavicular ligaments are damaged or torn

Question 14

High grade shoulder separation

Answer 14

• complete tear of coracoclavicular ligament and AC ligament
• clavicle moves superior over acromion and acromion moves inferior and may cause damage to GH joint

Question 15

Shoulder dislocation

Answer 15

• inferior joint capsule isn’t reinforced by rotator cuff or ligaments, and is vulnerable when arm is in abducted position
• humerus dislocates inferiorly, puts pressure on neurovascular bundle

Question 16

Describe the location and contents of the subacromial space​ - HELP

Answer 16

• location: tendon of supraspinatus is the primary occupant,

Question 17

Predict what neurovascular structures would be injured based on bone fracture located at the medial border of the scapula​ - HELP

Answer 17

dorsal scapular nerve and artery would be damaged

Question 18

Describe the location and function of the bursae of the scapular region​

Answer 18

• subacromial bursa - reduces friction btwn supraspinatus tendon and acromion
• subtendinous bursa of subscapularis - reduces friction btwn subscapularis tendon and coracoid process
• subdeltoid bursa - reduces friction btwn deltoid tendon and greater tubercle of humerus