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
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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 26 18 Pons (3_5)Below
Begin 26 18 Pons (3_5) Transcription
Let’s take a look at descending motor pathways in the pons. Student doctor, list three descending pathways located at the base of the pons.
The corticospinal, the corticopontine, and the corticobulbar.
Student doctor, which descending motor pathway synapses in the ventral horn of the spinal cord?
- The corticospinal tract.
And which descending motor pathway synapses in the pontine nuclei?
- The corticopontine tract.
And which descending motor pathway synapses in the motor nuclei of the cranial nerves, except in the oculomotor nucleus of the oculomotor, trochlear, and abducens nerve?
- This is the corticobulbar tract.
Student doctor, what is the name of the tract that carries rubroolivary and reticulothalamic fibers?
- This is the central tegmental tract.
And the central tegmental tract extends from what larger structure to what nucleus?
- The central tegmental tract extends from the midbrain to the inferior olivary nucleus.
The juxtarestiform body forms a part of what nucleus?
- The inferior olivary nucleus.
Student doctor, list the three fibers that are carried by the juxtarestiform body.
First, the vestibulocerebellar.
Second, the cerebellovestibular, and
third, the cerebelloreticular.
Student doctor, what cerebellar peduncle connects the pons to the midbrain?
- This is the superior cerebellar peduncle.
And what is the cerebellar peduncle that connects the pons to the cerebellum?
- This is the middle cerebellar peduncle.
Student doctor, where are the dorsal and ventral cochlear nuclei of the vestibulocochlear nerve, CN VIII, located? At the medullopontine junction.
Student doctor, what are the fibers carried by the medial longitudinal fasciculus?
- The medial longitudinal fasciculus contains vestibular fibers of the vestibulocochlear nerve.
Now the medial longitudinal fasciculus, containing the vestibular fibers of the vestibulocochlear nerve, mediates what two functions?
- Nystagmus and the lateral conjugate gaze.
****END OF TRANSCRIPTION****
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