Chapter 4 Flashcards
- Which of the following muscles is known as “Lats little helper” because it assists latissimus dorsi in extending , adducting , and internally rotating the shoulder?
Teres major
*Which of the following muscles is the most superficial on the back and covers a large, kite-shaped area?
Trapezius
*Infraspinatus performs which of the following actions?
Externally rotates, adducts, extends, and horizontally abducts the shoulder
*Which of the following muscle names is derived from the Latin word meaning”two heads”?
Biceps
Which of the following muscles *originates on the lateral third clavicle, acromion process, and spine of scapula; abducts the shoulder; and is a prime mover for nearly all movements of the shoulder?
Deltoid
*Which two muscles work together to stabilize the scapula on the ribcage durning weight- bearing movements?
Rhomboid major & minor
*Which of the following is a large back muscle that primarily moves the humerus
Latissimus dorsi
*Which of the following is a powerful chest muscle responsible for movements in front of the body, such as pushing, reaching, throwing, and punching?
Pectoralis major
*Which of the following muscles has three heads and works atangonistically to the biceps brachii to extend and adduct the shoulder and extend the elbow?
Triceps brachii
*The rotator cuff is composed of which muscles?
Supraspinatus, Infraspinatus, teres minor, and subscapularis
True or False? Eccentric muscles contractions generate movement, whereas concentric contractions serve to slow and control movements of the arm
False
True or False? The primary function of the supraspinatus is the retract the scapula
False
True or False? The function of the subclavius is controversial and somewhat unclear
True
Serratus anterior performs which of the following actions?
Assists with forced inspiration when the insertion is fixed
True or False? Scapulohumeral rhythm is the coordinated movement between the scapulothoracic and glenohumeral joints
True
Levator scapula performs which of the following actions?
Elevates the scapula and extends the head
True or False? Teres minor is one of the four muscles that make up the rotator cuff
True
Subscapularis performs which of the following actions?
Internally rotates the shoulder
Which of the following muscles has three heads and works antagonistically to the biceps brachii to extend and adduct the shoulder and extend the elbow?
Triceps brachii
Which of the following muscles has a strong attachment to the coraclid process of the scapula and acts to protract and depress the scapula?
Pectoralis minor
