page_title: Sulcus limitans
hierarchical_section_title: Sulcus limitans
caption_attribution_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 dorsalis) Trigonum nervi hypoglossi Trigonum nervi vagi Area postrema Obex Sulcus posterolateralis Sulcus intermedius posterior Sulcus medianus Fasciculus gracilis Tuberculum gracile (Nucleus gracilis) Fasciculus cuneatus Tuberculum cuneatum (Nucleus cuneatus) Funiculus lateralis medullae oblongatae Apertura lateralis ventriculi quarti 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 &amp; slender) and Fasciculus Cuneatus (wedge shaped), and the Posterolateral Sulcus separates the Fasciculus Cuneatus from the 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. 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. Lateral to the median eminence at the junction between the medulla &amp; 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. 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). 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. (font: arial black, size: 10)
context_page_description: The sulcus limitans is found in the fourth ventricle of the brain. It separates the cranial nerve motor nuclei from the sensory nuclei. It can also be located by searching laterally from the medial eminence. It is parallel to the median sulcus.
context_section_description: The sulcus limitans is found in the fourth ventricle of the brain. It separates the cranial nerve motor nuclei (medial) from the sensory nuclei (lateral). It can also be located by searching laterally from the medial eminence. It is parallel to the median sulcus.
caption: Human caudal brainstem posterior view (The sulcus limitans separates #2 from #4.)
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