Which myotome corresponds to knee extension?

Prepare for PTTM Exam 1. Utilize flashcards and multiple choice questions, each with hints and detailed explanations. Get ready to excel in your test!

Multiple Choice

Which myotome corresponds to knee extension?

Explanation:
Knee extension is produced by the quadriceps muscle group, which is innervated by the femoral nerve coming from the upper lumbar nerve roots. In myotome testing, the movement that best reflects this muscle group is linked primarily to the L3 myotome. Testing knee extension strength against resistance taps into the L3 input, so weakness here points to involvement at that myotomal level. The other options correspond to different functions: L2 is more about hip flexion, L5 governs dorsiflexion and some toe movements, and S1 covers plantarflexion. So the knee-extending action most cleanly maps to the L3 myotome, which is why that option is chosen.

Knee extension is produced by the quadriceps muscle group, which is innervated by the femoral nerve coming from the upper lumbar nerve roots. In myotome testing, the movement that best reflects this muscle group is linked primarily to the L3 myotome. Testing knee extension strength against resistance taps into the L3 input, so weakness here points to involvement at that myotomal level. The other options correspond to different functions: L2 is more about hip flexion, L5 governs dorsiflexion and some toe movements, and S1 covers plantarflexion. So the knee-extending action most cleanly maps to the L3 myotome, which is why that option is chosen.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy