Scapula Muscles Word Scramble
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| Question | Answer |
| Serratus anterior origin | Lateral parts of the 1th-8th ribs |
| Serratus anterior insertion | Anterior surface of medial border of scapula |
| Serratus anterior innervation | long thoracic nerve |
| Serratus anterior action | 1. protracts scapula 2. holds scapula against the thoracic wall 3. superior rotation of the scapula |
| Deltoid origin | lateral third of clavicle, acromion process, and spine of scapula |
| Deltoid insertion | deltoid tuberosity |
| Deltoid innervation | axillary nerve |
| Deltoid Action | 1. All three simultaneously: abduct the humerus after 15 degrees to the horizontal and stabilize the shoulder 2. Anterior: flexion and medial rotation of the humerus 3. Posterior: extension and lateral rotates the humerus |
| Teres Major origin | inferior angle of scapula (posterior surface) |
| Teres major insertion | medial lip of intertubercular sulcus |
| Teres major innervation | lower subscapular nerve |
| Teres major action | adducts and medially rotates the humerus |
| Name the rotator cuff muscles | "SITS" Supraspinatus, Infrapinatous, Teres minor, Subscapularis |
| Supraspinatus origin | Supraspinous fossa |
| Supraspinatus insertion | superior aspect of greater tubercle |
| Supraspinatus innervation | suprascapular nerve |
| Supraspinatus action | 1. Abduct the arm for the first 15 degrees 2. Tonic contraction stabilizes the glenohumeral joint |
| Infraspinatus origin | Infraspinous fossa |
| Infraspinatus insertion | middle aspect of the greater tubercle |
| infraspinatus innervation | suprascapular nerve |
| infraspinatous action | 1. tonic contraction stabilizes the glenohumeral joint 2. laterally rotates arm |
| teres minor origin | middle part of lateral border of scapula |
| teres minor insertion | inferior aspect of greater tubercle |
| teres minor innervation | axillary nerve |
| teres minor action | 1. tonic contraction stabilizes the glenohumeral joint 2. laterally rotates the arm |
| subscapularis origin | subscapular fossa |
| subscapularis insertion | lesser tubercle |
| subscapularis innervation | upper and lower subscapular nerves |
| subscapularis action | 1. tonic contaction stabilizes glenohumeral joint 2. medially rotates arm |
Created by:
afiahmed
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