Asked by Lauren Gerardi on Sep 23, 2024
Verified
Due to its name and position in the forearm (posterior medial side of the forearm) , the actions of the extensor carpi ulnaris are most likely to
A) flex the wrist and abduct the thumb.
B) flex the wrist and adduct the hand.
C) flex the wrist and abduct the hand.
D) extend the wrist and abduct the hand.
E) extend the wrist and adduct the hand.
Adduct
To move a limb or other body part toward the midline of the body.
Wrist
The joint connecting the hand and the forearm.
Extensor Carpi Ulnaris
A muscle located in the forearm that extends and adducts the wrist, playing a significant role in the movement of the hand and wrist.
- Identify the actions of forearm muscles based on their names and anatomical positions.
Verified Answer
AH
Abrar Hassan7 days ago
Final Answer :
E
Explanation :
The extensor carpi ulnaris muscle is responsible for extending the wrist and adducting the hand towards the midline of the body. Its name also suggests that it is located near the ulna bone of the forearm. A and C are incorrect because they involve wrist flexion, and B involves adduction of the thumb, not the hand. D is incorrect because it involves wrist abduction, which is opposite to the action of the extensor carpi ulnaris. Therefore, E (extend the wrist and adduct the hand) is the best choice.
Learning Objectives
- Identify the actions of forearm muscles based on their names and anatomical positions.