shoulder: pectoral girdle arthrology Flashcards
What are the 3 true joints of the pectoral girdle
.Sternoclavicular joint
.Acromioclavicular joint
.Glenohumeral joint
What are the 2 other joints of the pectoral girdle
.Scapulothoracic articulation
.Subacromial articulation
What does the clavicles S shape allow for
All types of movements such as 180 degrees of lateral flexion
The joint between the humerous and the glenoid fossa is called what?
The glenohumeral joint
What 2 sections does the spine of the scapula separate
The infraspinatous fossa at the bottom and the suparsprinatus fossa at the top.
What is the 3rd fossa of the scapula
The supscapular fossa
What does the coracoid process provide
Provides attachments for tendons and ligaments
What bones make up the pectoral girdle
The clavicle and scapula.
What is the role of the posterior sternoclavicular ligament
Provides stability in a posterior direction.
What is the role of the costoclavicluar ligament
Goes from the cartilage of the ribs to the clavicle and provides stability during movement.
Where is the acromioclavicular joint located
The outer end of the clavicle
Describe the traposoid ligament
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.
What is the function of the labrum in the glenohumoral joint
Provides an increase in articular surface for the movement of the head of the humerous.
Describe the superior glenohumeral ligament and its location
Provides stability in the superior and anterior direction. Located above the medial glenohumeral ligament
Describe the medial glenhumeral ligament and its location
Provides stability in an anterior direction and is located below the superior glenohumeral ligament
Describe the inferior gleohumeral ligament and its location
Provides stability inferiorly and is located below the medial glenohumeral joint.
Describe the coracohumeral ligament
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
describe the coracoacromial ligament
Provide stability and reinforce the coracoid acromial arch and acts as a roof for movement of the head of the humorous.
What are the scapula movements in the frontal plane
Elevation
Depression
What are the movements of the glenohumeral joint
Flexion, extension, lateral rotation, medial rotation, abduction, adduction, and circumduction.
Describe how the joints of the shoulder complex can reach 180 degrees
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.
describe Origin and insertion of the desscending part of the trapezius and the movement it creates
origin is the occipital bone. Inserts on the posterior aspect of the clavicle and acromion. Will cause elevation of shoulder and retracts the scapula.
Describe origin and insertion of the transverse trapezius and how it moves
Origin is c7 to t4 spinal process. Inserts into the acromion of the scapula. Causes retraction and elevation.
Describe origin and insertion of the asscending trapezius and how it moves
Origin is t5 to t12 of spinal process. Inserts on the medial part of the spine of the scap. Causes retraction and depression.
Describe origin and insertion of the levator scapula and how it moves
Originates on the transverse process of c1 and c2 to cv and inserts in the superior angle of the scapula. Causes elevation
Describe origin and insertion of the Rhomboid minor and how it moves
Originates in the nuchal ligament. Inserts in the medial border of the scapula. causes retraction
Describe origin and insertion of the Rhomboid major and how it moves
Originates t2 to t5 and inserts in the medial border of the scapula. Causes retraction
Describe origin and insertion of the pectoralis minor and how it moves
Originates in the anterior end of the third to fifth ribs and inserts into the coracoid process. causes protraction and depression.
Describe origin and insertion of the pectoralis major and how it moves
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
Describe origin and insertion of the serratus anterior and how it moves
Originates from first to 9th rib and inserts in the medial border of the scapula and causes protraction of the scapula.
Describe the infra glenoid tuberosity
provides insertion for the long head of triceps.
Describe the super glenoid tuberosity
Provides insertion for the long head of the bicep brachii
Describe the origin and insertion of the supraspinatus and its function
Origin in the supraspinatus fossa and inserts in the greater tuberosity of the humorous. Causes abduction of the glenohumeral joint
Describe the origin and insertion of the side delts and its function
Origin in the acromion of the scapula and inserts on the deltoid tuberosity of the humerous, causes abduction.
Describe the origin and insertion of the teres major and its function
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.
Describe the origin and insertion of the anterior deltoid and its function
Origin in the last third of clavicle and inserts in the humeral tuberosity. Causes flexion and medial rotation
Describe the origin and insertion of the biceps long head and its function
Origin in the supra glenoid tuberical and inserts in the tuberosity of the radial. Causes flexion
Describe the origin and insertion of the biceps short head and its function
Origin in the coracoid process and inserts in the radial. Causes flexion
Describe the origin and insertion of the coracobrachialis and its function
Origin in the coracoid process and inserts in the medial aspect of humerous. Causes flexion
Describe the origin and insertion of the Latismus dorsi and its function
Origin in the spinal processes and inserts in the humorous. Causes extension and
Describe the origin and insertion of the Posterior delt and its function
Origin in spine of scapula and inserts in the deltoid tuberical of the humorous. Causes extension and lateral rotation of humorous
Describe the origin and insertion of the Triceps brachii long head and its function
Origin in the infra glenoid tubericol and inserts in the common tendon of the olecranon.
Describe the origin and insertion of the tricep medial head and its function
Origin in the posterior surface of the humorous and inserts in the olecranon.
Describe the origin and insertion of the subscap and its function
Origin in the subscap fossa and insert in the lesser tuberosity of humorous causes medial rotation.
Describe the origin and insertion of the teres minor and its function
Origin in the posterior aspect of the scapula and inserts in the greater tuberosity of the humorous. Causes lateral rotation.
Describe the origin and insertion of the Infraspinatus and its function
origin in the infraspinatus fossa and inserts in the greater tuberosity of the humorous, and causes lateral rotation and horizontal abduction.
What muscles make up the rotator cuff
Supraspinatus, Infraspinatus and the teres minor posteriorly.
Subscap anteriorly.
What is the main function of the rotator cuff
To centre the head of the humorous during different movements of the glen humeral joint
