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Ch. 9 The Muscular System

Chapter 9, Problem 9.3a

Elise is a competitive gymnast who strained muscles in her left lower limb doing a tumbling pass. She has pain with extension of her leg and inversion of her foot. Which muscles did she potentially strain?

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Hey, everyone. Let's take a look at this question together, Michael, a runner recently experienced a foot injury. After a few days, he found it difficult to lift the front part of his foot. Which of the following muscles was most likely affected by the injury. Is it answer choice? A gastrocnemius answer choice B the tibialis posterior answer choice C the tibialis anterior or answer choice. D the fibularis brevis, let's work this problem out together to try to figure out which of the following answer choices is the muscle that was most likely affected by Michael's foot injury, making it difficult for him to lift the front part of his foot. So in order to solve this question, we have to recall the muscles that are responsible for lift the front part of the foot that when those muscles are injured would make it difficult to do so. And we can recall that the movement of lifting the front of the foot is referred to as dorsiflexion. And we know that the leg muscle that is responsible for dorsiflexion of the foot is the tibialis anterior, which is answer choice C, the correct answer since that tibialis anterior which is that leg muscle that is responsible for dorsiflexion of the foot, which is lifting the foot up when injured would make it difficult to do that movement. So, answer choice, C is the correct answer. And all other answer choices are incorrect since injuries to those muscles would not result in that difficulty to lift the front part of the foot. I hope you found this video to be helpful. Thank you and goodbye.