USMLE Step 1 Review 01 15 Anatomy Function

USMLE Step 1 Review 01 15 Anatomy Function

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  • USMLE Audio Review files from our “Gold Standard USMLE Reviews”
  • Transcriptions of those files
  • And videos (as they become available)

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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 15 Anatomy Function Below

 

Begin 01 15 Anatomy Function Transcription

Arm and shoulder function. We’re gonna be looking at the arm in anteversion, retroversion, outward and inward rotation, A-B-duction and adduction.

What are the two muscles for retroversion?

  • Teres major, latissimus dorsi.

What is the muscle for anteversion?

  • Deltoid.

What are the two muscles for outward rotation?

  • Infraspinatus and teres minor.

And what are the two muscles for inward rotation?

  • Subscapularis and teres major.

What are the two muscles for A-B-duction?

  • Supraspinatus first, then deltoid.

And the three muscles for adduction?

  • Pectoralis major, latissimus dorsi and teres major.

This time through add the nerves.

Muscles and nerves for retroversion?

  • Teres major/ lower subscapular nerve, latissimus dorsi/thoracodorsal nerve.

Muscle and nerve for anteversion?

  • Deltoid/axillary nerve.

Muscles and nerves for outward rotation?

  • Teres minor/axillary nerve, infraspinatus/suprascapular nerve.

Muscles and nerves for inward rotation?

  • Subscapularis/upper and lower subscapular nerves and teres major/lower subscapular nerve.

And muscles and nerves for A-B-duction?

  • Supraspinatus/suprascapular nerve and deltoid/axillary nerve.

And the three muscles and nerves for adduction?

  • Pectoralis major/medial and lateral pectoral nerves, latissimus dorsi/thoracodorsal nerve and teres major/lower subscapular nerve.

Let’s turn it around.

What is the motion of the arm caused by infraspinatus muscle/suprascapular nerve and teres minor/axillary nerve?

  • Outward rotation.

What is the rotation of the arm caused by supraspinatus first/suprascapular nerve and then deltoid, or axillary nerve?

  • A-B-duction .

What is the motion for deltoid muscle/axillary nerve?

  • Anteversion.

And what’s the motion of the arm for teres major muscle/lower subscapular nerve and latissimus dorsi muscle/thoracodorsal nerve?

  • Retroversion.

Motion of the arm for pectoralis major muscle/medial and lateral pectoral nerve, latissimus dorsi/thoracodorsal nerve and teres major/lower subscapular nerve?

  • Adduction.

And the motion for subscapularis/upper and lower subscapular nerves, and teres major/lower subscapular nerve? 

  • Inward rotation.

What is the motion for infraspinatus/suprascapular nerve and teres minor/axillary nerve?

  • Outward rotation.

Let’s take them in pairs.

Retroversion and anteversion, muscles and nerves?

  • For retroversion, teres major/lower subscapular nerve and latissimus dorsi/thoracodorsal nerve. For anterversion, deltoid muscle/axillary nerve.
  • Do the same for outward and inward rotation. For outward rotation, infraspinatus/suprascapular nerve and teres minor/axillary nerve and for inward rotation, subscapularis/upper and lower subscapular nerves and teres major/lower subscapular nerve.

For A-B-duction and adduction?

  • For A-B-duction, supraspsinatus first/ suprascapular nerve and deltoid second/axillary nerve. For adduction, pectoralis major/medial and lateral pectoral nerves, latissumus dorsi/thoracadorsal nerve and teres major/lower subscapular nerve.

Student-doctor, please pause the tape here and summarize the motions of the arm and shoulder functions, giving the six motions first and then listing the muscles and nerves.

  • Retroversion of the upper limb and anteversion, outward and inward rotation, A-B-duction and adduction.
  • For retroversion, teres major muscle/lower subscapular nerve, latissumus dorsi muscle/thoracodorsal nerve. For anteversion, deltoid muscle/axilary nerve. For outward rotation, infraspinatus muscles/suprascapular nerve and teres minor/axillary nerve. For inward rotation, subscapularis muscle/upper and lower subscapular nerves and teres major muscle/lower subscapular nerve. For A-B-duction, supraspinatus first/suprascapular nerve and deltoid second/axillary nerve. For adduction, pectoralis major/medial and later pectoral nerves, latissumus dorsi/thoracodorsal nerve and teres major muscle/lower subscapular nerve.

****END OF TRANSCRIPTION****

 

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