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You are here: Home / GS Step 1 Prep / Anatomy 1 / 01 18 Anatomy Knee Function / USMLE Step 1 Review 01 18 Anatomy Knee Function

USMLE Step 1 Review 01 18 Anatomy Knee Function

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Let’s continue our USMLE Review with Anatomy from the Gold Standard USMLE Step 1 Audio Review program.

Play USMLE Audio MP3 01 18 Anatomy Knee Function Below

http://boardprep.net/wp-content/uploads/1-18-Knee-Function.mp3

 

Begin 01 18 Anatomy Knee Function Transcription

We have four motions at the knee: extension, flexion, outward and inward rotation.

Please give the muscle and nerve for extension.

  • Quadriceps femoris muscle/femoral nerve L2, L3, L4.

Group and nerve for flexion at the knee?

  • The hamstring muscles, all sciatic nerve.

Muscle, nerve and levels for outward rotation?

  • Biceps femoris muscle, that’s outward rotation when the knee is flexed, sciatic nerve L1-S3.

Inward rotation with the knee flexed?

  • Semimembranous muscle/sciatic nerve L1-S2.

Name the muscle, nerve and cord levels for flexion at the knee.

  • Hamstrings, biceps femoris, semitendinous, semimembranous, all sciatic nerve L1-S3.

Let’s turn it around. Give motion, nerve and levels for the following muscles.

Quadriceps femoris?

  • Extension of the knee, femoral nerve L2-L4.

Biceps femoris by itself?

  • When the knee is flexed, outward rotation, sciatic nerve L1-S3.

Semimembranous muscle by itself?

  • When the knee is flexed, inward rotation, sciatic nerve L2-S2.

The hamstrings?

  • Flexion, sciatic nerve L1-S3.

Student-doctor, please pause the tape and summarize the four motions of the knee with muscles, nerves and levels. Again, start with the motions.

  • Extension, flexion, outward and inward rotation. For extension, quadriceps femoris/femoral nerve L2-L4. For flexion, hamstring muscles, biceps femoris, semitendinous and semimembranous and all sciatic nerves L1-S3. Outward rotation with the knee flexed, biceps femoris muscle/sciatic nerve L1-S3. And inward rotation with the knee flexed, semimembranous muscle/sciatic nerve L1-S2.

****END OF TRANSCRIPTION****

 

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Filed Under: 01 18 Anatomy Knee Function, Anatomy 1 Tagged With: 2011, Anatomy, Audio, Board, Board Prep, Gold Standard, Knee Function, MP3, review, USMLE, USMLE 1, USMLE Step 1, USMLE Step One, Video

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