USMLE Step 1 Neuroanatomy Review 26 19 Pons (4_5)

USMLE Step 1 Neuroanatomy Review 26 19 Pons (4_5)

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 19 Pons (4_5)Below

Begin 26 19 Pons (4_5) Transcription

Now we’re going to take a look at ascending sensory pathways in the pons.

Which nuclei in the pons give rise to the contralateral lateral lemniscus?

  • The dorsal and ventral cochlear nuclei.

What structure in the pons consists of decussating fibers of the ventrocochlear nuclei?

  • This is the trapezoid body.

What additional four things are contained in the trapezoid body?

  • The trapezoid body also contains acoustic striae, the medial lemniscus, exiting abducent fibers, and corticobulbar fibers.

Student doctor, what are the auditory relay nuclei in the pons?

  • The superior olivary nucleus.

And which ascending sensory pathway forms the auditory pathway from the trapezoid body to the nuclei of the inferior colliculus?

  • The lateral lemniscus.

Student doctor, what ascending tract mediates contralateral dorsal column modalities to the VPL nucleus of the thalamus?

  • The medial lemniscus.


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