Sulcus limitans

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This article is about the structure in the fourth ventricle. For the structure in the developing nervous system, see Sulcus limitans (neural tube).

Brain: Sulcus limitans
Rhomboid fossa. (Sulcus limitans not labeled, but region is visible.)
Human caudal brainstem posterior view (The sulcus limitans separates #2 from #4.)
Latin	Sulcus limitans fossae rhomboideae
Gray's	p.799
NeuroNames	hier-626

In the floor of the fourth ventricle, the sulcus limitans separates the cranial nerve motor nuclei (medial) from the sensory nuclei (lateral).^[1] In the superior part of the rhomboid fossa, it corresponds with the lateral limit of the fossa and presents a bluish-gray area, the locus ceruleus (which owes its color to an underlying patch of deeply pigmented nerve cells, termed the substantia ferruginea). The sulcus limitans can also be located by searching laterally from the medial eminence. It is parallel to the median sulcus.

References

↑ Nolte, John. The Human Brain 6th ed. p.685. Mosby Inc.

External links

This article incorporates text from a public domain edition of Gray's Anatomy.

Human brain, rhombencephalon, metencephalon: pons (TA A14.1.05.101–604, GA 9.785)

Dorsal/
(tegmentum)

Surface

White: Sensory/ascending

MLF, III, IV and VI: Vestibulo-oculomotor fibers

White: Motor/descending

Grey: Cranial nuclei

afferent:	GSA: Principal V/Spinal V VIII-c Dorsal Anterior VIII-v Superior

efferent:	SVE: Motor V VII GSE: VI GVE: VII: Superior salivary nucleus

Other grey

Ventral/
(base)

Grey	Pontine nuclei

White: Motor/descending	Corticospinal tract Corticobulbar tract Corticopontine fibers MCP Pontocerebellar fibers

Surface	Basilar sulcus

Other grey: Raphe/
reticular

M: CNS

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

Ventricular system, rhombencephalon, met- and myel-: fourth ventricle (TA A14.1.05.701–726, GA 9.797)

Roof (dorsal)

rostral:	Superior medullary velum (Frenulum)

caudal:	Inferior medullary velum Taenia of fourth ventricle

Floor/rhomboid fossa (ventral)

rostral (pons):	Facial colliculus Locus coeruleus

caudal (medulla}:	Vagal trigone Hypoglossal trigone Area postrema Obex

Medial eminence Sulcus limitans

Apertures

Other

M: CNS

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

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