a. Name the four muscle pairs that act in unison to compress the abdominal contents. b. How does their arrangement (fiber direction) contribute to the strength of the abdominal wall? c. Which of these muscles can effect lateral rotation of the spine? d. Which can act alone to flex the spine?

Video transcript

Everyone. Let's take a look at this question together which of the following terms refers to the diagonal direction. The muscle fibers run is it answer choice. A Rectus answer. Choice B transverse answer, choice C oblique or answer choice D abdominous. Let's work this problem out together to try to figure out which of the following answer choices is the correct answer. So of the following terms, we want to know which one describes the diagonal direction that the muscle fibers run. While looking at our answer choices, we can immediately eliminate answer choice. D since abdominus is not a term that is used to describe a direction and instead refers to the abdominal muscles and looking at answer choices A B and C, we note that Rectus refers to the muscle fibers that run straight or parallel to the midline of the body and does not indicate that diagonal direction that we are looking for. So answer choice A is incorrect answer. Choice B transverse. We note refers to the muscle fibers that run perpendicular or horizontal in relation to the midline of the body. And also does not describe that diagonal direction that we are looking for So answer choice B is incorrect, which leaves us with the only remaining answer choice which is answer choice C oblique, which we note that the term oblique refers to the muscle fibers that are oriented diagonally instead of straight or perpendicular. So answer choice C oblique is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.