Structures Limiting Movements Of Pectoral Girdle

Question 0

Limiting structures of flexion

Answer 0

Ligaments: posterior part of coracohumeral, trapezoid, and posterior part of joint capsule of glenohumeral joint
Muscles: rhomboids, levator scapulae, extensor and external rotator muscles, rotator muscles of glenohumeral joint

Question 1

Joints at which flexion occurs

Answer 1

Sternoclavicular
Acromioclavicular
Glenohumeral
Scapulothoracic

Question 2

Joints of abduction

Answer 2

Sternoclavicular
Acromioclavicular
Glenohumeral
Scapulothoracic

Question 3

Abduction limiting structures

Answer 3

Ligaments: middle and inferior glenohumeral, trapezoid, and inferior part of joint capsule of glenohumeral joint
Muscles: rhomboids, levator scapulae, adductor muscles of glenohumeral joint
Bony apposition between greater tubercle of humerus and superior part of glenoid cavity/labrum or lateral aspect of acromion

Question 4

Extension joint

Answer 4

Glenohumeral

Question 5

Extension limiting structures

Answer 5

Ligaments: anterior part of coracohumeral and anterior part of joint capsule of glenohumeral joint
Muscles: clavicular head of pectoralis major

Question 6

Medial (internal) rotation joint

Answer 6

Glenohumeral

Question 7

Medial (internal) rotation limiting structures

Answer 7

Ligaments: posterior glenohumeral joint capsule
Muscles: infraspinatus and teres minor

Question 8

Lateral (external) rotation joint

Answer 8

Glenohumeral

Question 9

Lateral (external) rotation limiting structures

Answer 9

Ligaments: glenohumeral, coracohumeral, anterior glenohumeral joint capsule
Muscles: latissimus dorsi, teres major, pectoralis major, subscapularis