USMLE Step 1 Neuroanatomy Review 25 03 Embryology

USMLE Step 1 Neuroanatomy Review 25 03 Embryology

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 25 03 Embryology Below

Begin 25 03 Embryology Transcription

Student doctor, please pause and summarize the embryologic development of the nervous system.

The neural tube begins development during the third week of embryonic development.

The neural tube will give rise to the central nervous system:

  • the brain and the spinal cord.

During the fourth week the neural tube divides into three primary brain vesicles:

  • the prosencephalon, the mesencephalon, and the rhombencephalon. During the fifth week the five secondary brain vesicles are formed.

The mesencephalon stays itself, but the prosencephalon gives rise to the telencephalon and the diencephalon.

The rhombencephalon will give rise to the metencephalon and the myelencephalon

The secondary brain vesicles give rise to various adult derivatives.

The walls of the telencephalon give rise to the cerebral hemispheres, while the cavity of the telencephalon gives rise to the lateral vesicles.

The walls of the diencephalon give rise to the thalamus, hypothalamus, epithalamus, and subthalamus, while the cavity of the diencephalon gives rise to the third ventricle.

The walls of the mesencephalon give rise to the midbrain, while the cavity of the mesencephalon gives rise to the cerebral aqueduct.

The walls of the metencephalon give rise to the pons and the cerebellum, while the cavity of the metencephalon gives rise to the superior part of the fourth vesicle.

The walls of the myelencephalon give rise to the medulla oblongata, while the cavity of the myelencephalon gives rise to the inferior part of the fourth ventricle.

 

****END OF TRANSCRIPTION****

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