The posterior median sulcus of medulla oblongata (or posterior median fissure or dorsal median sulcus) is a narrow groove; and exists only in the closed part of the medulla oblongata; it becomes gradually shallower from below upward, and finally ends about the middle of the medulla oblongata, where the central canal expands into the cavity of the fourth ventricle.
This article incorporates text from a public domain edition of Gray's Anatomy.
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Human brain: rhombencephalon, myelencephalon: medulla (TA A14.1.04, GA 9.767)
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| Dorsal |
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Surface
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Posterior median sulcus · Posterolateral sulcus · Area postrema · Vagal trigone · Hypoglossal trigone · Medial eminence
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Grey: Cranial nuclei
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afferent: GVA: VII,IX,X: Solitary/tract/Dorsal respiratory group · SVA: Gustatory nucleus · GSA: VIII-v (Lateral, Medial, Inferior)
efferent: GSE: XII · GVE: IX,X,XI: Ambiguus · SVE: X: Dorsal · IX: Inferior salivatory nucleus
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Grey: other
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Gracile nucleus · Cuneate nucleus · Accessory cuneate nucleus
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White: Sensory/ascending
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Sensory decussation · Medial lemniscus · Inferior cerebellar peduncle (Juxtarestiform body) · Ascending dorsal longitudinal fasciculus · MLF, III, IV and VI
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White: Motor/descending
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Descending dorsal longitudinal fasciculus · MLF, III, IV and VI
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| Ventral |
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White: Motor/descending
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Motor decussation · Olivocerebellar tract · Rubro-olivary tract
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Grey matter
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Ventral respiratory group · Arcuate nucleus of medulla · Inferior olivary nucleus · Rostral ventromedial medulla
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Surface
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Anterior median fissure · Anterolateral sulcus · Olive · Pyramid
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Grey: Raphe/
reticular |
Reticular formation (Gigantocellular, Parvocellular, Ventral, Lateral, Paramedian) · Raphe nuclei (Obscurus, Magnus, Pallidus)
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M: CNS
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anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp
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noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr
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proc, drug (N1A/2AB/C/3/4/7A/B/C/D)
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