Shoulder Girdle and Muscle Functions

<p>Protraction and upward rotation (D)</p> Signup and view all the answers

<p>By positioning the glenohumeral joint favorably (A)</p> Signup and view all the answers

<p>Supraspinatus (B)</p> Signup and view all the answers

<p>Trapezius (Upper) (C)</p> Signup and view all the answers

<p>Permitting stable positioning (C)</p> Signup and view all the answers

<p>Teres Major (C)</p> Signup and view all the answers

<p>Elevation (B)</p> Signup and view all the answers

<p>Infraspinatus and Teres Minor (A)</p> Signup and view all the answers

<p>45 degrees (D)</p> Signup and view all the answers

<p>Costoclavicular ligament (B)</p> Signup and view all the answers

<p>SC joint elevation and downward rotation at AC joint (B)</p> Signup and view all the answers

<p>Provide a movement base for the humerus (D)</p> Signup and view all the answers

<p>Adduction of the humerus (A)</p> Signup and view all the answers

<p>To approximate the humerus and prevent dislocation (C)</p> Signup and view all the answers

<p>For every 3 degrees of shoulder abduction, 2 degrees occur at the GH joint (B)</p> Signup and view all the answers

<p>60 degrees of GH motion and 30 degrees of ST motion (A)</p> Signup and view all the answers

<p>Loss of static stability of the GH joint (C)</p> Signup and view all the answers

<p>Rotator cuff pain (B)</p> Signup and view all the answers

<p>Scapulohumeral rhythm (B)</p> Signup and view all the answers

<p>Assists the deltoid in abduction (A)</p> Signup and view all the answers

<p>To maintain proper alignment of the humeral head (D)</p> Signup and view all the answers

<p>Rotator Cuff (D)</p> Signup and view all the answers

<p>External rotation of humerus (D)</p> Signup and view all the answers

<p>Gliding occurs in the same direction as angular motion (C)</p> Signup and view all the answers

<p>All of the above (D)</p> Signup and view all the answers

<p>70 degrees (D)</p> Signup and view all the answers

<p>Structural stenosis of subacromial space (B)</p> Signup and view all the answers

<p>Isolation from shoulder girdle motion (C)</p> Signup and view all the answers

<p>Capsular tightness (C)</p> Signup and view all the answers

The Teres Major muscle is located in the shoulder and is responsible for extending, adducting, and medially rotating the arm.

The Triceps Brachii muscle is located in the upper arm and is responsible for adducting, extending, and hyperextending the humerus.

The upper trapezius, levator scapula, and rhomboids all contribute to elevating the scapula.

The lower trapezius and pectoralis minor muscles lower the scapula.

The serratus anterior and pectoralis minor muscles pull the scapula forward.

The middle and lower trapezius, rhomboids, and levator scapulae muscles pull the scapula backwards.

The serratus anterior and upper trapezius muscles rotate the scapula upwards.

The rhomboids, pectoralis minor, and levator scapulae muscles rotate the scapula downwards.

The glenohumeral joint, acromioclavicular joint, sternoclavicular joint, scapulothoracic articulation, and the subacromial space.

The shoulder girdle muscles provide a stable base for the shoulder muscles to generate force, maintain appropriate force-length relationships, and ensure maximum congruence of the shoulder joint.

The shoulder girdle allows for the largest range of motion (ROM) of any complex in the body. The shoulder girdle increases ROM with less compromise of stability through scapulohumeral rhythm, due to its multiple joints.

The shoulder girdle can perform movements including elevation, depression, protraction, retraction, upward rotation, downward rotation, upward tilt and reduction of upward tilt.

The pectoralis minor, serratus anterior, subclavius, levator scapulae, rhomboids, and trapezius are the main muscles that control the shoulder girdle.

Shoulder girdle muscles help control the movement of the scapula while the shoulder joint muscles help control the movement of the humerus. Some muscles like the biceps brachii affect both the shoulder girdle and shoulder joint.

The pectoralis major, deltoid, coracobrachialis, subscapularis, biceps brachii, supraspinatus, infraspinatus, teres minor, and latissimus dorsi are the main muscles that control the shoulder joint.

The shoulder girdle provides stability while the shoulder joint allows for mobility. Together they allow for the full range of motion of the arm, essential for many activities.

The coordinated movement of the scapula and humerus during arm elevation, involving the glenohumeral and scapulothoracic joints.

Two forces of equal magnitude but opposite direction working together to create a specific motion.

The rotator cuff muscles, including supraspinatus, infraspinatus, teres minor, and subscapularis, work together to stabilize the shoulder joint.

The glenohumeral joint (shoulder joint) is dynamically stabilized by the coordinated action of the rotator cuff muscles.

The relationship between the amount of movement at the glenohumeral joint (GH) and the scapulothoracic joint (ST) during arm elevation.

The coordinated action of the scapulothoracic muscles, including the trapezius and serratus anterior, that creates a smooth and controlled movement of the scapula during arm elevation.

A condition characterized by pain and restricted movement in the shoulder, often caused by inflammation or irritation of the rotator cuff tendons.

A condition characterized by compression of the rotator cuff tendons under the acromion, causing pain and inflammation in the shoulder.

The relationship between the length of a muscle and the amount of force it can generate. Shortened muscles generate less force, while lengthened muscles can generate more force, but only up to a certain point.

The muscles that surround and support the shoulder joint. They help to rotate, abduct, and adduct the arm. They also help to stabilize the shoulder joint.

The joint where the humerus (upper arm bone) meets the scapula (shoulder blade). It is a ball and socket joint, allowing for a wide range of motion.

The ligaments that surround and stabilize the glenohumeral joint. They help to prevent excessive movement and dislocation.

The space between the acromion (part of the shoulder blade) and the humerus (upper arm bone). It is where the tendons of the rotator cuff muscles pass.

The combination of bony structures, ligaments, and muscles that help to stabilize the glenohumeral joint.

Describes how the joint surfaces move relative to each other during movement.

A type of joint motion where the joint surfaces roll on each other. This is an important movement pattern in the glenohumeral joint.