This video is part of a playlist of videos on the internal structure of the brain stem. The playlist uses simplified sketches that are gradually drawn for the purpose of description.
In this video, internal structure at the following section levels is described:
Level of facial and abducent nucleus (lower pons)
Level of trigeminal nuclei (upper pons)
Level of open part of the medulla oblongata
For each fiber tract the location, function, origin and destination are summarized. Each nucleus is identified in terms of location, function and connections. Thus the session correlates anatomical structures seen in the pons with those of the medulla oblongata, midbrain and spinal cord. For this purpose, sections of the spinal cord, and medulla oblongata have also been added.
After completion of this video session, it is expected that you will be able to
Develop a three dimensional picture of the gross anatomy of the medulla oblongata and its internal structure.
Locate the positions of cranial nerve nuclei and the paths taken by the major ascending and descending nerve tracts
Assess the signs and symptoms presented by the patient and identify the exact location of a lesion affecting the brain stem.
Correlate the signs and symptoms of pons astrocytoma with nuclei and nerve tracts involved by the tumor.
Explain the difference in signs of upper and lower motor neuron lesions affecting the facial motor nucleus.
Presented and edited by Dr. Akram Jaffar, Ph.D.
Medulla oblongata, simplified sections of internal structure youtu.be/Jg9qTzchy6E
Midbrain, simplified sections of internal structure youtu.be/1gQuznVG1F8
Pons external anatomy www.youtube.com/watch
Anatomy of the corneal reflex www.youtube.com/watch
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