As a person is vigorously rowing a boat, they suddenly experience extreme pain in their upper arm and no longer can extend at the elbow joint. Which of the following is probably the injured muscle?
A)Biceps brachii
B)Brachioradialis
C)Triceps brachii
D)Supinator

Question

Quizplus · Accepted Answer

The triceps brachii is the primary muscle responsible for extension of the elbow joint. If a person cannot extend at the elbow, it suggests an injury to the triceps brachii.

As a Person Is Vigorously Rowing a Boat, They Suddenly