Upper Limb Muscles Anatomy
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Questions and Answers

What is the origin of the pectoralis major muscle?

The origin of the pectoralis major muscle is the medial half of the clavicle and the front of the sternum and upper 6 costal cartilages.

What is the action of the serratus anterior muscle?

The action of the serratus anterior muscle is protraction and upward rotation of the scapula, and fixation of the scapula's medial border.

What is the insertion of the latissimus dorsi muscle?

The insertion of the latissimus dorsi muscle is the floor of the bicipital groove of the humerus.

What is the origin of the trapezius muscle?

<p>The origin of the trapezius muscle is the external occipital process, nuchal ligament, C7 spine, thoracic spines, and supraspinous ligaments.</p> Signup and view all the answers

What is the insertion of the supraspinatus muscle?

<p>The insertion of the supraspinatus muscle is the upper facet of the greater tuberosity of the humerus.</p> Signup and view all the answers

What is the action of the subscapularis muscle?

<p>The action of the subscapularis muscle is medial rotation of the arm.</p> Signup and view all the answers

What are the functions of the Serratus Anterior muscle in the shoulder?

<p>Elevates, retracts and rotates scapula upwards, and stabilizes shoulder from behind.</p> Signup and view all the answers

Where is the origins of the Biceps Brachii muscle located?

<p>Supraglenoid tubercle (long head) and coracoid tip (short head).</p> Signup and view all the answers

What is the function of the Flexor Digitorum Profundus muscle in the forearm?

<p>Flexion of the wrist and fingers.</p> Signup and view all the answers

Where is the origin of the Brachialis muscle located?

<p>Upper ½ of humerus, front.</p> Signup and view all the answers

Where is the origin of the Flexor Carpi Ulnaris muscle located?

<p>Common flexor origin and medial side of olecranon process of ulna.</p> Signup and view all the answers

What is the function of the Supinator muscle in the forearm?

<p>Supination of the forearm.</p> Signup and view all the answers

What is the location of the radial artery and where does it divide into?

<p>In the cubital fossa, at the level of the radius neck, dividing into radial and ulnar arteries.</p> Signup and view all the answers

What are the branches of the radial artery in the forearm and hand?

<p>Forearm: radial recurrent, muscular, and ant. carpal; Hand: post. carpal, radialis indicis, and deep palmar arch.</p> Signup and view all the answers

What is the location of the ulnar artery and where does it divide into?

<p>In the cubital fossa, at the level of the radius neck, as one of the brachial artery terminals.</p> Signup and view all the answers

What is the site of the scapula bone in the shoulder girdle?

<p>The site of the scapula bone is posterior, covering ribs 2-7.</p> Signup and view all the answers

What are the branches of the ulnar artery in the forearm and hand?

<p>Forearm: ant. and post. ulnar recurrent, muscular; Hand: ant. and post. carpal, and superficial palmar arch.</p> Signup and view all the answers

What is the type of joint formed by the acromion and clavicle?

<p>Acromioclavicular, synovial plane.</p> Signup and view all the answers

What type of joint is the Acromioclavicular joint, and what type of joint is the Sternoclavicular joint?

<p>Synovial plane joint and synovial modified saddle joint, respectively.</p> Signup and view all the answers

What muscle is located on the anterior aspect of the medial 2/3 of the clavicle?

<p>Pectoralis major clavicular head.</p> Signup and view all the answers

What two bones form the shoulder joint?

<p>Humerus and glenoid cavity of the scapula.</p> Signup and view all the answers

What is the name of the groove on the inferior aspect of the clavicle, close to the medial end?

<p>Subclavius groove.</p> Signup and view all the answers

What is the name of the bony prominence on the humerus where the supraspinatus, infraspinatus, and teres minor muscles attach?

<p>Greater tuberosity.</p> Signup and view all the answers

Where does the pulmonary trunk begin and what is its termination point?

<p>The pulmonary trunk begins at the pulmonary orifice of the right ventricle, opposite the left 3rd sternocostal junction, and terminates at the disc between T4 and T5, dividing into the right and left pulmonary arteries.</p> Signup and view all the answers

What are the branches of the ascending aorta?

<p>The branches of the ascending aorta are the right and left coronary arteries.</p> Signup and view all the answers

What type of joint is the elbow joint, and what bones form it?

<p>Synovial hinge joint, formed by the humerus, trochlea, and capitulum.</p> Signup and view all the answers

What is the course of the aortic arch?

<p>The aortic arch begins at the right 2nd sternocostal junction, as a continuation of the ascending aorta, and ends at the right 2nd sternocostal junction, becoming the descending aorta.</p> Signup and view all the answers

What are the relations of the descending aorta?

<p>The descending aorta has anterior relations with the pericardium and esophagus, right relations with the esophagus and azygos vein, and posterior relations with the supremai and inferior hemiazygos veins.</p> Signup and view all the answers

Where does the superior vena cava begin and end?

<p>The superior vena cava begins at the right 1st costal cartilage, by the union of the right and left brachiocephalic veins, and ends at the right 3rd costal cartilage, by opening into the right atrium.</p> Signup and view all the answers

What is the origin and root value of the phrenic nerve?

<p>The phrenic nerve originates in the neck, at the level of C3, 4 and 5.</p> Signup and view all the answers

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