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 The internal structure at the following section levels is described:
Level of the inferior colliculus
Level of the superior colliculus
Level of the lower pons
Level of the open medulla
Spinal cord

00:00 Overview of features
02:23 Substantia nigra
03:53 Crus cerebri
05:58 Inferior colliculus
07:27 Trochlear nucleus
07:45 Medial longitudinal fasciculus
09:29 Mesencephalic nucleus of the trigeminal nerve
09:50 Decussaiton of the superior cerebellar peducle
10:10 Reticular formation
11:10 Lemnisci
13:57 Superior colliculus
15:51 Edinger-Westphal nucleus
16:43 Dissociation of reflexes and Argyll Robertson pupil
18:41 Oculomotor nucleus
20:47 Red nucleus
22:33 Vascular disorders: Weber syndrome
24:03 Benedict’s syndrome
25:36 Blockage of the cerebral aqueduct

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.

Related videos:
Medulla oblongata, simplified sections of internal structure [ Ссылка ]
Pons, simplified sections of internal structure [ Ссылка ]
Anatomy of the light reflexes [ Ссылка ]
Anatomy of the accommodation reflex [ Ссылка ]
Midbrain, external anatomy [ Ссылка ]

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