| The spine of the scapula separates the supraspinatus muscle from__________? | Where does the infraspinatus originate? |
| The _____________ is a triangular muscle, also named for its location in the ____________ FOSSA of the scapula. | The infraspinatus is a triangular muscle, also named for its location in the infraspinous ______ of the scapula. |
| The infraspinatus and teres minor rotate the head of the humerus outward
(external, or lateral, rotation); they also assist in carrying the arm (Which direction). | Fill in the blanks (2). Which two muscle allow you to do this action? They assist in also carryin the arm backward. |
| Teres Minor. Its belly lies parallel to the inferior edge of the
__________ and is sometimes indistinguishable from it | What muscle is this? Its belly lies parallel to the inferior edge of the
INFRASPINATOUS and is sometimes indistinguishable from it |
| The infraspinatus and teres minor attach to head of the humerus; as part of
the rotator cuff they help hold the humeral head in the glenoid cavity of the
scapula. | The _________ and __________ attach to head of the humerus; as part of the rotator cuff they help hold the humeral head in the glenoid cavity of the scapula. |
| The subscapularis. | What muscle allows this movement? |
| Rotation, Elevation, Retraction and Protraction (moving the shoulders foreward and back). The ________ braces the shoulder and moderates these movements. | What movements is the scapular capeable of? The clavicle braces the shoulder and moderates these
movements. (4) |
| The major muscles of the anterior group of pectoral girdle are the _______ ______ and serratus anterior. | The major muscles of the anterior group of pectoral girdle are the pectoralis minor and _____ ______. |
| See image. | What are the following muscles? |
| The _________ muscle arises from separate heads on ribs 1 to 9. | The serratus anterior arises from separate heads on ribs _ to _. |
| What are the 4 muscles refered to as "SITS"? | subscapularis, infraspinatus, teres minor and supraspinatus |
| Label these two muscles. | Left: Pectoralis Major, Right: Pectoralis Minor |
| What is unique about the pectoralis major's insertion on the humerus? | The pectoralis inserts "twisted" on the humerus, and it "untwists" with raising of the arm. When in use it helps with the rotation and adduction of the humerous, and keeps the humerous attatched to the body. |
| What muscle is this? What is it's primary function? | Latissimus Dorsi |
| What are the 7 subscapular muscles? | coracobrachialis muscle
deltoid muscle
teres major muscle
SITS; infraspinatus muscle, subscapularis muscle, supraspinatus muscle, teres minor muscle |
| A large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm. What is its name? | Deltoid |
| What is one function of the deltoid? | - Flex the arm at the (glenohumeral) shoulder joint.
- Medially rotatesthe arm at the (glenohumeral) shoulder joint.
- Abducts the arm at the (glenohumeral) shoulder joint. |
| What is this SECTION of muscle? | Anterior Deltoid |
| What is this SECTION of muscle? | Medial Deltoid |
| What is this SECTION of muscle? | Posterior Deltoid |
| When the angle between the arm and torso becomes LESS than 60%, the Posterior and Anterior deltoid sections act as ___________ to the medial deltoid? | Antagonists (they relax) |
| When the angle between the arm and torso becomes MORE than 60%, the Posterior and Anterior deltoid sections act as ___________ to the medial deltoid? | Agonists (they contract) |
