Shoulder Girdle Flashcards
What is the origin of a muscle
Proximal attachment to bone which stays still when muscle contracts
What is the insertion of the muscle?
Attachment of muscle to bone which moves during muscle contraction
What are the 3 bones of the shoulder Girdle?
Scapula, clavicle and humerus
What are the names of the 3 joints at the shoulder Girdle?
Glenohumeral, acromioclavicular,sternoclavicular
What is the name of the point of articulation on the scapular in the glenohumeral joint
Glenoid cavity or fossa
What is the name of the point of articulation on the scapula in the acromioclavicular joint.?
Acromion process
What is the point of articulation in the glenohumeral joint in the humerus called?
Head of humerus
What type of joint is the glenohumeral joint
Synovial, polyaxial ball and socket
What movements are possible at the glenohumeral joint?
Flexion, extension, abduction, adduction, scaption, medial and lateral rotation
What is the glenoid labrum
A fibrocartilaginous rim around d the glenoid cavity which improves stability
What type of joint is the acromioclavicular
Plane synovial joint
What are the articulating surfaces of the acrimioclavicukar joint
Acromion process of scapula to the lateral/acromial end of the clavicle
What are the articulating surfaces of the sternoclavicular joint?
Above first rib on sternum and medial end of clavicle
What is scapulothoracic joint?
Medial border of scapula attached to the posterior of the ribs
What are the movements at the shoulder joint?
Elevation, depression, protractor, retraction, abduction, adduction, lateral and medial rotation, flexion, extension
Which 3 muscles contribute to lateral rotation of the scapula?
Upper trapezius, serratus anterior, lower trapezious
Which 3 muscles create medial or downwards rotation of the scapula?
Rhomboids, levator scapula, pectoralis minor
What is the origin and insertion of pectoralis major?
Wide head from clavicle all round to sternum, biciptal groove
What movements does the pectoralis major help create?
Shoulder flexion, medial rotation, abduction
What is origin and insertion of f pectoralis minor?
3-5th ribs into coracoid process of scapula
What 3 movements does Pec Minor create?
Protraction, depression, medial rotation of scapula
What is origin and insertion of serrated anterior
Origin ribs 1-8/9 and insert into imferior medial border of scapula
What is the main movement of serratus anterior?
Lateral rotation of scapula
What are the 4 key muscles of the posterior thorax?
Latissimus dorsi, trapezius, levator scapula, rhomboids
What are the key actions of the Upper trapezius
Elevation
What are the key movements for lower trapezius?
Depress scapula
Middle trapezius movement?
Retraction
Upper and lower traps together?
Laterally rotate
What’s the main movements created by levator scapula?
Elevation and medial rotation
What’s the main action caused by the rhomboids major and minor
Retract, medially rotate
What’s the main action created by thr latissimus dorsi
Adduction, medial rotation, retraction
What muscles are responsible for elevation?
Upper trapezius and levator scapulae
What muscles are responsible for depression?
Lower trapezius
Pectoralis minor
Latissimus Dorsi
What muscles are responsible for protraction?
Serratus anterior, levator scapulae, pectoralis minor
What muscles are responsible for retraction?
Middle trapezius, rhomboid major and minor, latissimus dorsi
What muscles are responsible for lateral or upward rotation of scapula?
Upper trapezius, serratus anterior
What muscles are responsible for medial or downwards rotation?
Rhomboids, levator scapulae, pectoralis minor
