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)
The idea is that you can review for the USMLE online by:
- Listening to the Audio
- Following along with the transcription
- Or by watching the video (if available)
If you like what you here, you can purchase the entire Gold Standard Step 1 MP3 audio USMLE review for your iPhone, iPod, or computer here.
Let’s start our USMLE Review with Anatomy from the Gold Standard USMLE Step 1 Audio Review program.
Play USMLE Audio MP3 26 12 Midbrain (2_5)) Below
Begin 26 12 Midbrain (2_5) Transcription
Now we’re going to look at the internal anatomy of the midbrain. A horizontal cross section of the midbrain can be divided into three regions.
What are these three regions?
- The base, the tegmentum, and the tectum.
The base, of course, forms the base, but how would you describe in this horizontal cross section the region of the tectum?
- The tectum is the region dorsal to the cerebral aqueduct.
And how would you describe the tegmentum?
- The tegmentum is located between the base and the tectum.
If you thought of the midbrain as organized like a house, what would the tectum form?
- The tectum forms the roof of the midbrain.
And it includes what structures?
- The superior colliculi.
What two sets of structures are contained within the tegmentum?
- The cranial nerve nuclei and the sensory pathways.
And what are the three tracts that are contained within the base?
- The corticospinal, the corticobulbar, and the corticopontine tracts.
The internal anatomy of the midbrain is often considered on two levels. What are these two levels?
- The level of the superior colliculus, which is more rostral, and the level of the inferior colliculus, which is more caudal.
****END OF TRANSCRIPTION****
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