Quiz 1 Flashcards
In the upper portion of the skeleton, the axial skeleton is attached to the appendicular skeleton by which true boney articulation?
Sternoclavicular joint
Which muscles are attached to the lateral border of the scapula?
Teres minor
Teres major
Which muscle is attached to the superior angle of the scapula?
Levator scapulae
Which muscles are attached to the medial border of the scapula?
Serratus anterior
levator scapulae
rhomboid minor
rhomboid major
What is the articulation of the glenohumeral joint?
Glenoid fossa of scapula articulates with the head of the humerus
Name the 3 scapular fossae and the muscles in each.
Supraspinous fossa/supraspinatus muscle
Infraspinous fossa/infraspinatus muscle
Subscapular fossa/subscapularis muscle
Which muscles attach to the coracoid process?
Pectoralis minor
short head of biceps brachii
coracobrachialis
Which muscles attach to the acromion process?
Trapezius
deltoid
Which muscles attach to the greater tubercle of the humerus?
Supraspinatus
infraspinatus
teres minor
What tendon lies in the intertubercular groove of the humerus?
Long head of biceps brachii
What is the rim of fibrocartilage lining the glenoid fossa?
Glenoid labrum
Name the group of muscles that provide the greatest stability to the shoulder joint.
Rotator cuff muscles - supraspinatus, infraspinatus, teres minor and subscapularis
Which muscles perform external rotation at the glenohumeral joint?
Infraspinatus
teres minor
deltoid (posterior fibers)
Which muscles perform flexion at the glenohumeral joint?
Biceps brachii, pectoralis major, coracobrachialis, deltoid (anterior fibers)
Which muscle performs all 3 actions of extension, internal rotation and adduction at the glenohumeral joint?
Latissimus dorsi
Why is the scapulothoracic joint considered a pseudo joint?
No true boney articulation
True joint movement occurs at which joints to allow movement between the scapula and rib cage?
Sternoclavicular and acromioclavicular joints
Rhomboid major and rhomboid minor are deep to which muscles?
Trapezius
What is the primary action of rhomboid major and rhomboid minor?
Retraction and downward rotation
What is the thin sheet of connective tissue called that extends from the biceps brachii and is an attachment site for this muscle?
Bicipital aponeurosis
Which 2 muscles is the long head of triceps brachii sandwiched between?
Teres major, teres minor
Which part of triceps brachii performs glenohumeral extension?
Long head of triceps brachii
Which part of triceps brachii performs elbow extension?
Long head, medial head and lateral head of triceps brachii
Name the 3 fiber orientations of trapezius and the perspective actions at the scapulothoracic joint.
descending (superior) fibers - elevate the scapula.
middle fibers - retract the scapula
ascending (inferior) fibers - depress the scapula and lower the shoulder
