On these “Gold Standard Step 1 Facts” pages you will find Free:
- USMLE Audio Review files from our “Gold Standard USMLE Reviews”
- Transcriptions of those files
- And videos (as they become available)
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- Listening to the Audio
- Following along with the transcription
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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 16 Anatomy Elbow Function Below
Begin 01 16 Anatomy Elbow Function Transcription
- Extension, flexion, pronation and supination.
Muscles and nerves for extension?
- Triceps brachii/radial nerve and anconeus muscle/radial nerve.
Muscles and nerves for flexion of the elbow?
- Biceps brachii/musculocutaneous nerve and brachioradialis muscle/radial nerve.
For pronation of the forearm?
- Pronator teres and pronator quadratus muscles, both by the median nerve.
Supination of the forearm?
- Biceps brachii/musculocutaneous nerve and supinator muscle/radial nerve.
Let’s turn it around.What’s the motion?
Biceps brachii and brachioradialis?
- Flexion of the elbow.
Pronator teres and pronator quadratus?
- Pronation of the forearm.
Biceps brachii and supinator muscle?
Triceps brachii and anconeus muscle?
- Elbow extension.
Let’s make it a little harder. This time I’ll just give the minor muscle, you give the motion.
What is it when biceps brachii is the minor muscle involved?
And what is it when the minor muscle has quadratus in the name?
Let’s take it just with the nerves. What are the two nerves involved with flexion of the elbow?
- Musculocutaneous and radial nerve.
Which nerve with extension of the elbow?
- The radial nerve.
What are the two nerves involved with supination of the forearm?
- The radial and musculocutaneous nerves.
What is the nerve involved with pronation of the forearm?
- The median nerve.
Student-doctor, please pause the tape and summarize for elbow function. Give the four motions and then give the muscles and the nerves.
- Flexion and extension of the elbow, pronation and supoination of the forearm. For flexion, biceps brachii/musculocutaneous nerve, brachioradialis/radial nerve. For extension, triceps brachii/radial nerve, anconeus muscle/radial nerve. Pronation, pronator teres and pronator quadratus, both by median nerve. And supination, biceps brachii/musculocutaneous and supinator muscle/radial nerve.
****END OF TRANSCRIPTION****
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