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)
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Let’s start our USMLE Review with Anatomy from the Gold Standard USMLE Step 1 Audio Review program.
Play USMLE Audio MP3 25 06 Meninges Below
Begin 25 06 Meninges Transcription
Now we’re going to discuss the meninges.
The brain is surrounded by how many meningeal layers?
- By three meningeal layers. These three meningeal layers which, along with the cerebrospinal fluid, provide support and protection for the brain.
Student doctor, what is the outermost cranial meningeal layer?
- The outermost cranial meningeal layer is the dura mater.
How many layers is the dura mater composed of?
And what are the two layers that compose the dura mater?
- The meningeal layer and the periosteal layer.
What artery is the main blood supply to the dura mater?
- The middle meningeal artery.
A blow to the head can lacerate the middle meningeal artery. What would be the resulting condition?
- An epidural hemorrhage.
What is the name of the innermost meningeal layer that follows the contours of the brain?
- This is the pia mater.
And what is the name of the middle meningeal layer?
- This is the arachnoid mater.
In terms of blood supply, what is a distinct difference between the arachnoid mater and the dura mater?
- The arachnoid matter is avascular.
Student doctor please pause and summarize the information on the meninges.
The brain is surrounded by three meningeal layers which, along with the cerebrospinal fluid, provide support and protection for the brain.
The outermost cranial meningeal layer is the dura mater.
The dura mater is made up of two layers, a meningeal layer and a periosteal layer.
The main source of blood supply to the dura is from the middle meningeal artery.
A blow to the head can lacerate the middle meningeal artery leading to an epidural hemorrhage.
The name of the innermost meningeal layer that follows the contour of the brain is the pia mater, and the middle meningeal layer between the pia mater and the dura mater is the arachnoid mater, which is avascular.
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