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Shoulder and Arm Muscles
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Shoulder and Arm Muscles
Shoulder and Arm Muscles
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1
Question
Which actions are attributed to the trapezius?
Page 1
Answer
It extends and abducts the head, rotates and adducts the scapula, and fixes the scapula.
2
Question
How does latissimus dorsi act on the arm and shoulder?
Page 1
Answer
It extends, adducts, and medially rotates the arm; it depresses the shoulder.
3
Question
Which movements does the deltoid produce at the arm?
Page 1
Answer
It abducts, flexes, and extends the arm, and medially and laterally rotates it.
4
Question
Which action do both rhomboideus major and minor share?
Page 1
Answer
Both adduct the scapula.
5
Question
Which actions are listed for levator scapulae?
Page 1
Answer
It elevates the scapula, abducts the neck, and rotates the neck.
6
Question
Which action does supraspinatus perform at the arm?
Page 1
Answer
It abducts the arm and stabilizes the shoulder joint.
7
Question
Which movements does infraspinatus produce at the arm?
Page 2
Answer
It extends and laterally rotates the arm, and stabilizes the shoulder joint.
8
Question
Which movements does subscapularis produce at the arm?
Page 2
Answer
It extends and medially rotates the arm, and stabilizes the shoulder joint.
9
Question
Which actions does teres minor perform?
Page 2
Answer
It extends, laterally rotates, and adducts the arm; it stabilizes the shoulder joint.
10
Question
How does teres major act on the arm?
Page 2
Answer
It extends, adducts, and medially rotates the arm.
11
Question
Which actions are attributed to triceps brachii?
Page 2
Answer
It extends and adducts the arm and extends the forearm.
12
Question
Which movements does pectoralis major produce at the arm?
Page 2
Answer
It flexes, adducts, and medially rotates the arm.
13
Question
Which actions are listed for pectoralis minor?
Page 2
Answer
It depresses the glenoid cavity and raises ribs 3–5.
14
Question
Which movements does biceps brachii produce?
Page 2
Answer
It flexes the arm and forearm, and supinates the hand.
15
Question
Which actions does coracobrachialis perform at the arm?
Page 3
Answer
It flexes and adducts the arm.
16
Question
Which action do brachialis and brachioradialis share?
Page 3
Answer
Both flex the forearm.
17
Question
Which action does supinator perform on the hand?
Page 3
Answer
It supinates the hand.
18
Question
Which actions does pronator teres perform?
Page 3
Answer
It pronates the hand and flexes the forearm.
19
Question
Which action does pronator quadratus perform?
Page 3
Answer
It pronates the hand.
20
Question
Where does the trapezius originate?
Page 1
Answer
From the occipital protuberance, nuchal ligament, and spinous processes of C7–T12.
21
Question
Where does the trapezius insert?
Page 1
Answer
On the clavicle, acromion process, and spine of scapula.
22
Question
Which structures give origin to latissimus dorsi?
Page 1
Answer
T7–12, L1–5, sacrum, iliac crest, and ribs 10–12.
23
Question
Where does latissimus dorsi insert on the humerus?
Page 1
Answer
In the intertubercular groove of the humerus.
24
Question
Which structures form the origin of the deltoid?
Page 1
Answer
The clavicle, acromion process, and spine of scapula.
25
Question
Where does the deltoid insert?
Page 1
Answer
At the deltoid tuberosity of the humerus.
26
Question
Where does rhomboideus major originate?
Page 1
Answer
From the spines of T1–4.
27
Question
Where does rhomboideus major insert on the scapula?
Page 1
Answer
At the inferior, medial border of the scapula.
28
Question
Which structures form the origin of rhomboideus minor?
Page 1
Answer
The nuchal ligament and spines of C6–7.
29
Question
Where does rhomboideus minor insert?
Page 1
Answer
At the medial border of the scapula at the scapular spine.
30
Question
Which vertebral levels give origin to levator scapulae?
Page 1
Answer
C1–4.