Shoulder Anatomy and Function Quiz

<p>Medial pectoral nerve (D)</p> Signup and view all the answers

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

<p>Coracoacromial ligament (A)</p> Signup and view all the answers

<p>Subacromial bursa (D)</p> Signup and view all the answers

<p>Transverse humeral ligament (C)</p> Signup and view all the answers

<p>It reduces friction between tendons and articulating surfaces (D)</p> Signup and view all the answers

<p>Coracohumeral ligament (A)</p> Signup and view all the answers

<p>Ball and socket joint (D)</p> Signup and view all the answers

<p>Disproportion of articular surfaces (A)</p> Signup and view all the answers

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

<p>Fibrous capsule (A)</p> Signup and view all the answers

<p>Glenohumeral ligaments (D)</p> Signup and view all the answers

<p>Reduce friction between tendons (C)</p> Signup and view all the answers

<p>Tendon of the long head of biceps brachii (D)</p> Signup and view all the answers

<p>Subscapular bursa (D)</p> Signup and view all the answers

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

<p>Coraco acromial arch (D)</p> Signup and view all the answers

<p>It is least protected (D)</p> Signup and view all the answers

<p>Axillary nerve (D)</p> Signup and view all the answers

<p>Avascularity of tendons (B)</p> Signup and view all the answers

<p>Coraco humeral ligament (C)</p> Signup and view all the answers

<p>Recurrent dislocation (A)</p> Signup and view all the answers

<p>Regimental badge area (C)</p> Signup and view all the answers

The shoulder joint, also known as the glenohumeral joint, is formed by the articulation of the glenoid cavity of the scapula and the head of the humerus. It's classified as a ball-and-socket synovial joint, allowing for a wide range of movements in various planes.

The glenoid cavity is a shallow socket on the scapula that receives the head of the humerus. It is deepened by a rim of fibrocartilage called the glenoid labrum.

The fibrous capsule, a tough membrane, encloses the shoulder joint, attaching to the glenoid labrum, scapula, and humerus. It helps stabilize the joint and allows for a wide range of motions.

The glenohumeral ligaments are three fibrous bands inside the capsule that reinforce the joint anteriorly. They connect the glenoid labrum to the humerus, providing stability.

The rotator cuff is a group of four muscles that surround the shoulder joint, providing stability and enabling a wide range of movements. These muscles help rotate and elevate the arm.

The subscapular bursa is a fluid-filled sac located between the tendon of the subscapularis muscle and the shoulder joint capsule, reducing friction during movement.

The coracohumeral ligament is a strong band that connects the coracoid process of the scapula to the greater tubercle of the humerus. It helps stabilize the shoulder joint and prevents upward displacement of the humerus.

The long head of the biceps brachii tendon originates from the supraglenoid tubercle and passes through the shoulder joint, outside the synovial membrane, contributing to stability and movement.

It connects the acromion and the coracoid process creating a protective arch over the shoulder.

A synovial fluid-filled sac found between the supraspinatus tendon and the coracoacromial arch, reducing friction during movement.

A group of four muscles (supraspinatus, infraspinatus, teres minor, and subscapularis) that stabilize and rotate the shoulder joint.

The tendon of the long head of the biceps muscle passes through this groove, connecting the shoulder joint to the elbow.

Inflammation of the subacromial bursa, a fluid-filled sac located under the acromion, often caused by repetitive overhead movements or injury.

The movement of the arm away from the side of the body, specifically the upward movement of the arm.

Irritation and inflammation of the rotator cuff tendons caused by repetitive friction as they move under the coracoacromial arch, a bony structure in the shoulder.

A potential complication of rotator cuff problems where the inflamed tendons also cause inflammation of the subacromial bursa.

This condition occurs when the tendons of the rotator cuff muscles become inflamed or irritated, often due to overuse or injury, and can result in pain and limited movement of the shoulder.

This occurs when the tendons of the rotator cuff muscles are compressed within the space between the acromion and the humerus. This can lead to pain and inflammation.

The rotator cuff muscles are crucial for lifting and rotating your arm, but injuries can occur due to overuse, trauma or degeneration.

The inferior aspect of the shoulder joint is the weakest, so dislocations often happen in this direction. This is called an anterior dislocation because the humerus moves forward.

This nerve is located near the shoulder joint and can get injured during dislocation, resulting in weakness in the deltoid muscle (responsible for shoulder abduction). It can affect the ability to lift the arm and cause numbness in the shoulder.

The rotator cuff muscles, glenohumeral ligaments, coracohumeral ligament, coracoacromial arch, glenoid labrum, and the long head of the biceps and triceps all contribute to the stability of the shoulder joint.

The glenoid labrum is a rim of cartilage that deepens the glenoid cavity, enhancing its ability to hold the humeral head and thus contributing to the shoulder's stability.