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In the caudal
Medulla, several structures are seen. The Posterior Median Sulcus is on the midline. The Posterior Intermediate sulcus divides the Fasciculus Gacilis (long & slender) and Fasciculus Cuneatus (wedge shaped), and the Posterolateral Sulcus separates the Fasciculus Cuneatus from the
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A swelling on either side of the
Posterior Median Sulcus called the Median Eminence is present from the rostral medulla through the pons. In the caudal pons a small rounded elevation in the median eminence, the Facial Colliculus (Motor fibers of VII passing over the Nu of VI ) can be seen.
591:{{Information| |Description= '''Human caudal brainstem - posterior view''' # Sulcus medianus # Eminentia medialis # Colliculus facialis (Motor fibers of VII passing over Motor Nucleus of VI) # Area vestibularis # Area auditoria (Nucleus cochlearis dorsa
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Lateral to the median eminence at the junction between the medulla & pons is the
Vestibular Area (Vestibular Nuclei), and lateral to this is the Auditory Area (Dorsal Cochlear Nucleus). The Sulcus Limitans separates the Median Eminence from the Vestibular Area.
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more lateral swelling, the
Tuberculum Cinereum (Spinal Nucleus of V). The Fasciculus Gracilis terminates rostrally in a swelling - the Tuberculum (Nucleus) Gracilis and the Fasciculus Cuneatus terminates in the Tuberculum (Nucleus) Cuneatus.
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Rostral to the tuberculum gracilis is the floor of the 4th ventricle or
Rhomboid Fossa which extends from the mid-medulla to the mid to rostral Pons. The caudal most point of the ventricle is called the Obex.
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Three V-shaped swellings can be seen in the caudal portion of the fossa. These are from medial to lateral: Hypoglossal
Trigone (Motor Nu XII), Vagal Trigone (Dorsal Motor Nu X), Area Postrema (Emetic Center).
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Dep't. of
Cellular Biology & Anatomy, Louisiana State University Health Sciences Center Shreveport
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Colliculus facialis (Motor fibers of VII passing over Motor
Nucleus of VI)
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Posterior view of the human brainstem with labelled surface markings.
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Human caudal brainstem posterior view description.JPG
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Human_caudal_brainstem_posterior_view_description.JPG
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734:Eminencia medial del piso del cuarto ventrículo
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