WordNet

make a veinlike pattern
any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ (同)nervure
one of the horny ribs that stiffen and support the wing of an insect (同)nervure
a layer of ore between layers of rock (同)mineral vein
a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood" (同)vena, venous blood vessel
a distinctive style or manner; "he continued in this vein for several minutes"
someone sent on a mission to represent the interests of someone else (同)envoy

PrepTutorEJDIC

〈C〉『静脈』 / 〈C〉(植物の)葉脈;(昆虫の)翅脈;(石の)石理;(木の)木目 / 〈C〉岩脈,鉱脈 / 〈U〉《しばしば a vein》(…の)傾向,性質《+of+名》 / 〈U〉《the vein》(…に対する)気分,気持ち《+for+名(doing)》
密使,密偵
(葉・昆虫の羽などの)脈模様,すじ

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/06/09 16:59:50」(JST)

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The emissary veins connect the extracranial venous system with the intracranial venous sinuses. They connect the veins outside the cranium to the venous sinuses inside the cranium. They drain from the scalp, through the skull, into the larger meningeal veins and dural venous sinuses. They are common in children.

Emissary veins have an important role in selective cooling of the head. They also serve as routes where infections are carried into the cranial cavity from the extracranial veins to the intracranial veins.

There are several types of emissary veins including posterior condyloid, mastoid, occipital, and parietal emissary vein.

Structure

There are also emissary veins passing through the foramen ovale, jugular foramen, foramen lacerum and hypoglossal canal.

Function

Because the emissary veins are valveless, they are an important part in selective brain cooling through bidirectional flow of cooler blood from the evaporating surface of the head. In general, blood flow is from external to internal but the flow can be altered by increased intracranial pressure

Clinical significance

A type of emissary vein goes through the sphenoidal emissary foramen inferior to the zygomatic arch with the cavernous sinus on the inside of the skull.

This is an important route for spread of infection because cranial nerve VI and the internal carotid pass through the cavernous sinus, with cranial nerves III, IV, V1, and V2 passing alongside the lateral wall of the sinus. Subsequent infection or inflammation in the cavernous sinus can result in damage to any of the cranial nerves that pass through it or meningitis. Also, rupturing the emissary veins will result in a subdural hematoma which will compress the brain.^[1]

References

^ Leestma, J.E. (2008). Forensic Neuropathology, Second Edition. CRC Press. ISBN 9781420008685. Retrieved 2014-12-10.

UpToDate Contents

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1. 下肢慢性静脈疾患治療のための血管内レーザー治療 endovenous laser ablation for the treatment of lower extremity chronic venous disease
2. 下肢毛細血管拡張症、網状脈および小静脈瘤のレーザーおよび光線療法 laser and light therapy of lower extremity telangiectasias reticular veins and small varicose veins
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4. 勃起不全の外科的治療 surgical treatment of erectile dysfunction
5. 敗血症性硬膜静脈洞血栓症 septic dural sinus thrombosis

English Journal

Three-dimensional printing of a sinus pericranii model: technical note.

Simonin A1, Martinerie S2, Levivier M3, Daniel RT3.
Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery.Childs Nerv Syst.2017 Mar;33(3):499-502. doi: 10.1007/s00381-017-3357-6. Epub 2017 Feb 28.
PMID 28247114

Analysis of the venous channel within the clivus using multidetector computed tomography digital subtraction venography.

Mizutani K1, Toda M2, Kurasawa J3, Akiyama T2, Fujiwara H3, Jinzaki M3, Yoshida K2.
Neuroradiology.Neuroradiology.2017 Mar;59(3):213-219. doi: 10.1007/s00234-017-1784-4. Epub 2017 Feb 24.
PMID 28236049

Craniovascular traits in anthropology and evolution: from bones to vessels.

Píšová H1, Rangel de Lázaro G2, Velemínský P3, Bruner E4.
Journal of anthropological sciences = Rivista di antropologia : JASS.J Anthropol Sci.2017 Feb 10. doi: 10.4436/JASS.95003. [Epub ahead of print]
PMID 28190005

Japanese Journal

複数の流入動脈を認めた頭蓋頚椎移行部硬膜動静脈瘻の1 例

Journal of Neuroendovascular Therapy 8(1), 46-51, 2014
NAID 130004565426

Enlarged parietal foramina : a rare finding in a female Greek skull with unusual multiple Wormian bones and a rich parietal vascular network

Anatomical science international 88(3), 175-180, 2013-06-01
NAID 10031176075

Classification of Dural Arteriovenous Shunts (DAVS) based on the Craniospinal Epidural Venous Drainage of the Central Nervous System and Adjacent Bony Structures(<SPECIAL ISSUES>Surgical Strategy for Dural AVF)