superior medullary velum


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su·pe·ri·or med·ul·lar·y ve·lum

[TA]
the thin layer of white matter stretching between the two superior cerebellar peduncles, forming the roof of the superior recess of the fourth ventricle.

su·pe·ri·or med·ul·lar·y ve·lum

(sŭ-pēr'ē-ŏr med'ŭ-lar'ē vē'lŭm) [TA]
The thin layer of white matter stretching between the two superior cerebellar peduncles, forming the roof of the superior recess of the fourth ventricle.

Vieussens,

Raymond de, French anatomist, 1641-1715.
valve of Vieussens - a prominent valve in the great cardiac vein where it turns around the obtuse margin to become the coronary sinus.
Vieussens annulus - Synonym(s): Vieussens ring
Vieussens ansa - Synonym(s): Vieussens loop
Vieussens centrum - the great mass of white matter composing the interior of the cerebral hemisphere. Synonym(s): centrum semiovale
Vieussens foramina - a number of fossae in the wall of the right atrium, containing the openings of minute intramural veins. Synonym(s): foramina of the venae minimae
Vieussens ganglia - the largest and highest group of prevertebral sympathetic ganglia, located on the superior part of the abdominal aorta, on either side of the origin of the celiac artery. Synonym(s): celiac ganglia
Vieussens isthmus - Synonym(s): Vieussens ring
Vieussens limbus - Synonym(s): Vieussens ring
Vieussens loop - a nerve cord connecting the middle cervical and stellate sympathetic ganglia, forming a loop around the subclavian artery. Synonym(s): ansa subclavia; Vieussens ansa
Vieussens ring - a muscular ring surrounding the fossa ovalis in the wall of the right atrium of the heart. Synonym(s): limbus fossae ovalis; Vieussens annulus; Vieussens isthmus; Vieussens limbus
Vieussens valve - the thin layer of white matter stretching between the two superior cerebellar peduncles forming the roof of the superior recess of the fourth ventricle. Synonym(s): superior medullary velum
Vieussens veins - the small superficial veins of the heart. Synonym(s): innominate cardiac veins
Vieussens ventricle - a slitlike, fluid-filled space of variable width between the left and right transparent septum. Synonym(s): cavity of septum pellucidum
References in periodicals archive ?
To do this, axons in the fascicular portion of the 4th nerve first travel in a posterior direction (ie opposite to the location of the orbit) around the edge of the PAG to emerge from the brainstem further posteriorly behind the inferior colliculi, having crossed the midline within the superior medullary velum, a thin sheet of tissue forming the superior border of the 4th ventricle between the upper pons and cerebellum.
The 4th nerve is most vulnerable to isolated damage by mechanical distortion in its long and unprotected path from its emergence at the superior medullary velum and through the sub-arachnoid space.

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