shoulder: pectoral girdle arthrology

Question 1

What are the 3 true joints of the pectoral girdle

Answer 1

.Sternoclavicular joint
.Acromioclavicular joint
.Glenohumeral joint

Question 2

What are the 2 other joints of the pectoral girdle

Answer 2

.Scapulothoracic articulation
.Subacromial articulation

Question 3

What does the clavicles S shape allow for

Answer 3

All types of movements such as 180 degrees of lateral flexion

Question 4

The joint between the humerous and the glenoid fossa is called what?

Answer 4

The glenohumeral joint

Question 5

What 2 sections does the spine of the scapula separate

Answer 5

The infraspinatous fossa at the bottom and the suparsprinatus fossa at the top.

Question 6

What is the 3rd fossa of the scapula

Answer 6

The supscapular fossa

Question 7

What does the coracoid process provide

Answer 7

Provides attachments for tendons and ligaments

Question 8

What bones make up the pectoral girdle

Answer 8

The clavicle and scapula.

Question 9

What is the role of the posterior sternoclavicular ligament

Answer 9

Provides stability in a posterior direction.

Question 10

What is the role of the costoclavicluar ligament

Answer 10

Goes from the cartilage of the ribs to the clavicle and provides stability during movement.

Question 11

Where is the acromioclavicular joint located

Answer 11

The outer end of the clavicle

Question 12

Describe the traposoid ligament

Answer 12

The trapezoid ligament connects the coracoid process of the scapula to the trapezoid line of the scapula. It will provide stability during the rotation of the clavicle.

Question 13

What is the function of the labrum in the glenohumoral joint

Answer 13

Provides an increase in articular surface for the movement of the head of the humerous.

Question 14

Describe the superior glenohumeral ligament and its location

Answer 14

Provides stability in the superior and anterior direction. Located above the medial glenohumeral ligament

Question 15

Describe the medial glenhumeral ligament and its location

Answer 15

Provides stability in an anterior direction and is located below the superior glenohumeral ligament

Question 16

Describe the inferior gleohumeral ligament and its location

Answer 16

Provides stability inferiorly and is located below the medial glenohumeral joint.

Question 17

Describe the coracohumeral ligament

Answer 17

Starts at the base of the coracoid process and inserts in the humorous It will provide stability in superior movements of the head of the humorous

Question 18

describe the coracoacromial ligament

Answer 18

Provide stability and reinforce the coracoid acromial arch and acts as a roof for movement of the head of the humorous.

Question 19

What are the scapula movements in the frontal plane

Answer 19

Elevation
Depression

Question 20

What are the movements of the glenohumeral joint

Answer 20

Flexion, extension, lateral rotation, medial rotation, abduction, adduction, and circumduction.

Question 21

Describe how the joints of the shoulder complex can reach 180 degrees

Answer 21

At the bottom there is 60 degrees of scapulthoracic rotation. There is then 30 degrees of joint elevation in the sternoclavicular and 30 degrees upward rotation in the acromioclavicular joint. Finally there is 120 degree abduction of the glenohumeral joint.

Question 22

describe Origin and insertion of the desscending part of the trapezius and the movement it creates

Answer 22

origin is the occipital bone. Inserts on the posterior aspect of the clavicle and acromion. Will cause elevation of shoulder and retracts the scapula.

Question 23

Describe origin and insertion of the transverse trapezius and how it moves

Answer 23

Origin is c7 to t4 spinal process. Inserts into the acromion of the scapula. Causes retraction and elevation.

Question 24

Describe origin and insertion of the asscending trapezius and how it moves

Answer 24

Origin is t5 to t12 of spinal process. Inserts on the medial part of the spine of the scap. Causes retraction and depression.

Question 25

Describe origin and insertion of the levator scapula and how it moves

Answer 25

Originates on the transverse process of c1 and c2 to cv and inserts in the superior angle of the scapula. Causes elevation

Question 26

Describe origin and insertion of the Rhomboid minor and how it moves

Answer 26

Originates in the nuchal ligament. Inserts in the medial border of the scapula. causes retraction

Question 27

Describe origin and insertion of the Rhomboid major and how it moves

Answer 27

Originates t2 to t5 and inserts in the medial border of the scapula. Causes retraction

Question 28

Describe origin and insertion of the pectoralis minor and how it moves

Answer 28

Originates in the anterior end of the third to fifth ribs and inserts into the coracoid process. causes protraction and depression.

Question 29

Describe origin and insertion of the pectoralis major and how it moves

Answer 29

Originates in the anterior clavicle, sternal costal head and ribs. Inserts on the greater tuberical of the humorous. Causes depression. Causes medial rotation and horizontal adduction

Question 30

Describe origin and insertion of the serratus anterior and how it moves

Answer 30

Originates from first to 9th rib and inserts in the medial border of the scapula and causes protraction of the scapula.

Question 31

Describe the infra glenoid tuberosity

Answer 31

provides insertion for the long head of triceps.

Question 32

Describe the super glenoid tuberosity

Answer 32

Provides insertion for the long head of the bicep brachii

Question 33

Describe the origin and insertion of the supraspinatus and its function

Answer 33

Origin in the supraspinatus fossa and inserts in the greater tuberosity of the humorous. Causes abduction of the glenohumeral joint

Question 34

Describe the origin and insertion of the side delts and its function

Answer 34

Origin in the acromion of the scapula and inserts on the deltoid tuberosity of the humerous, causes abduction.

Question 35

Describe the origin and insertion of the teres major and its function

Answer 35

Origin in the posterior aspect in the inferior angle of the scapula and inserts on the crest of the lesser tuberosity of the humorous. Causes medial rotation.

Question 36

Describe the origin and insertion of the anterior deltoid and its function

Answer 36

Origin in the last third of clavicle and inserts in the humeral tuberosity. Causes flexion and medial rotation

Question 37

Describe the origin and insertion of the biceps long head and its function

Answer 37

Origin in the supra glenoid tuberical and inserts in the tuberosity of the radial. Causes flexion

Question 38

Describe the origin and insertion of the biceps short head and its function

Answer 38

Origin in the coracoid process and inserts in the radial. Causes flexion

Question 39

Describe the origin and insertion of the coracobrachialis and its function

Answer 39

Origin in the coracoid process and inserts in the medial aspect of humerous. Causes flexion

Question 40

Describe the origin and insertion of the Latismus dorsi and its function

Answer 40

Origin in the spinal processes and inserts in the humorous. Causes extension and

Question 41

Describe the origin and insertion of the Posterior delt and its function

Answer 41

Origin in spine of scapula and inserts in the deltoid tuberical of the humorous. Causes extension and lateral rotation of humorous

Question 42

Describe the origin and insertion of the Triceps brachii long head and its function

Answer 42

Origin in the infra glenoid tubericol and inserts in the common tendon of the olecranon.

Question 43

Describe the origin and insertion of the tricep medial head and its function

Answer 43

Origin in the posterior surface of the humorous and inserts in the olecranon.

Question 44

Describe the origin and insertion of the subscap and its function

Answer 44

Origin in the subscap fossa and insert in the lesser tuberosity of humorous causes medial rotation.

Question 45

Describe the origin and insertion of the teres minor and its function

Answer 45

Origin in the posterior aspect of the scapula and inserts in the greater tuberosity of the humorous. Causes lateral rotation.

Question 46

Describe the origin and insertion of the Infraspinatus and its function

Answer 46

origin in the infraspinatus fossa and inserts in the greater tuberosity of the humorous, and causes lateral rotation and horizontal abduction.

Question 47

What muscles make up the rotator cuff

Answer 47

Supraspinatus, Infraspinatus and the teres minor posteriorly.

Subscap anteriorly.

Question 48

What is the main function of the rotator cuff

Answer 48

To centre the head of the humorous during different movements of the glen humeral joint