Your patient attempts to strengthen his triceps by positioning his shoulder at the end of range of shoulder and elbow extension.He reports weakness and inability to extend his shoulder more in this position.His report may best be explained by which of the following?
A) Active insufficiency of the biceps
B) Active insufficiency of the triceps
C) Passive insufficiency of the biceps
D) Passive insufficiency of the triceps

Question

Quizplus · Accepted Answer

Active insufficiency occurs when a muscle cannot shorten any further after it has been contracted to its limit. In this case, the triceps are being asked to contract while already in a shortened position due to the shoulder and elbow being fully extended. This limits the triceps' ability to generate force, leading to the reported weakness.

Your Patient Attempts to Strengthen His Triceps by Positioning His