What type of muscle contraction do the erector spinae muscles primarily undergo to control trunk flexion?
Understand the Problem
The question is asking us to identify which type of muscle contraction is primarily used by the erector spinae muscles when controlling trunk flexion. It presents multiple choice options to select from, indicating a need to understand muscle physiology.
Answer
Eccentric contraction.
The erector spinae muscles primarily undergo eccentric contraction to control trunk flexion.
Answer for screen readers
The erector spinae muscles primarily undergo eccentric contraction to control trunk flexion.
More Information
Eccentric contractions occur when muscles lengthen under load, providing control and stabilization, such as during the lowering phase of a movement. The erector spinae stabilize the spine and manage controlled forward bending by lengthening.
Tips
A common mistake is to confuse concentric and eccentric contractions. Concentric refers to muscle shortening, while eccentric refers to muscle lengthening under tension.
Sources
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