EXS 310 Final Exam 3
Radioulnar supination is performed by all of the following muscles except the:
Anconeus
Which of the following elbow flexors acts in "true flexion of the elbow?"
Brachialis
There is a synergy that exist among the glenohumeral, elbow, and radioulnar muscles. Actions that involve radioulnar supination (such as tightening a screw with a screwdriver) also involve glenohumeral_______ and elbow_________.
External rotation.... Flexion
A movement of the forearm away from the shoulder is best described by the term "flexion."
FALSE
The elbow is a hinge-type joint that allows internal and external rotation.
FALSE
The insertion of the brachialis is on the coracoid process of the radius.
FALSE
The insertion of the brachioradialis is on the styloid process of the ulna.
FALSE
Which of the following muscles is best stretched by using a partner to grasp the wrist and passively take the forearm into extreme supination?
Pronator quadratus
Which of the following is an anterior upper extremity muscle?
Pronator teres
Flexion of the elbow occurs in the ______plane of motion, and supination of the forarm occurs in the ______ plane of motion.
Sagittal; transverse
As the elbow reaches full extension, the olecranon process of the ulna is received by the olecranon fossa of the humerus, and this provides increased joint stability.
TRUE
Elbow motions primarily involve movement between the articular surfaces of the humerus and ulna.
TRUE
One head of the biceps brachii muscle originates from the supraglenoid tubercle of the scapula.
TRUE
The distal attachment (insertion) of the radioulnar joint muscles are located on the radius.
TRUE
The insertion of the biceps brachii is on the radial tuberosity.
TRUE
The pronator teres is innervated by the medial nerve (C6, C7).
TRUE
The pronator teres originates from the distal part of the medial supracondylar ridge of the humerus and the medial side of the proximal ulna.
TRUE
The triceps brachii inserts on the olecranon process of the ulna.
TRUE
The ulna is much larger proximally than the radius.
TRUE
The ulnar collateral ligament is critical to providing medial support to prevent the elbow from abducting when stressed in physical activity.
TRUE
The chief function of the _______ is to pull the synovial membrane of the elbow joint out of the way of the advancing olecranon process during extension of the elbow.
anconeus
Which of the following is a posterior upper extremity muscle?
anconeus
Which of the following correctly identifies the indicated (by the arrow) muscle in the figure, the origin and the insertion?
anconeus, origin- posterior surface of lateral condyle of humerus; insertion- posterior surface of upper ulna and olecranon process
Radioulnar pronation is performed by all of the following muscles except the:
bracialis
The pronator quadratus originates from the:
distal four of the anterior side of the ulna
Which of the following is an action of the biceps brachii?
horizontal adduction of the shoulder joint
The long head of the triceps brachii originates from the:
infraglenoid tubercle of the scapula
The pronator teres inserts on the:
middle third of the lateral surface of the radius
The radial nerve innervates all of the following muscles except:
pronator teres
In the context of radioulnar joint movements, which of the following terms refers to the "external rotary movement of the radius on the ulna that results in the hand moving from the palm-down to the palm-up position?"
supination
