Midbrain, Simplified Sections Of Internal Structure
8 years ago
This video is part of a playlist of videos on the internal structure of the brain stem. In this video, internal structure at the following section levels is described:
- Level of inferior colliculus
- Level of superior colliculus
- Level of lower pons
- Level of open medulla
- Spinal cord
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 midbrain with those of the pons, medulla oblongata and spinal cord. For this purpose a section of the spinal cord has 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 vascular syndromes (Weber's and Benedikt's syndrome) with the nuclei and nerve tracts involved by the vascular lesions. Explain the dissociation of pupillary light reflex from accommodation reflex in central nervous system syphilis (Argyll-Robertson pupil)
Presented and edited by Dr. Akram Jaffar, Ph.D.