WordNet

a small plexus formed by the fifth sacral and coccygeal nerves (同)plexus coccygeus
a network of intersecting blood vessels or intersecting nerves or intersecting lymph vessels (同)rete
of or relating to or near the coccyx

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/06/21 16:27:49」(JST)

The coccygeal plexus is a plexus of nerves near the coccyx bone.

This plexus is formed by the fifth sacral nerve (with a contribution from S4) and the coccygeal nerve. It gives rise to the anococcygeal nerve.

Coccygeal+plexus at eMedicine Dictionary
Description at uams.edu
Coccyx pain (tailbone pain, coccydynia) (Peer-reviewed medical chapter, available free online at eMedicine)

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Median sacral artery, sympathetic nerves, and the coccygeal body: A study using serial sections of human embryos and fetuses.

Jin ZW1, Cho KH2, Jang HS3, Murakami G4, Rodríguez-Vázquez JF5.
Anatomical record (Hoboken, N.J. : 2007).Anat Rec (Hoboken).2016 May 3. doi: 10.1002/ar.23365. [Epub ahead of print]
To examine how the median sacral artery (MSA) is involved with the coccygeal body or glomus coccygeum, we studied serial frontal or sagittal sections of 14 embryos (approximately 5-6 weeks of gestation) and 12 fetuses (10-18 weeks). At five weeks, the caudal end of the dorsal aorta (i.e., MSA) accom
PMID 27149546

Sokal P1, Zieliński P2, Harat M2.
Neurologia i neurochirurgia polska.Neurol Neurochir Pol.2015;49(5):307-12. doi: 10.1016/j.pjnns.2015.07.003. Epub 2015 Aug 6.
INTRODUCTION: Chronic pelvic pain is a syndrome of chronic non-malignant pain of multifactorial pathophysiology. Perineal, anal and coccygeal pain can be a form of failed-back surgery syndrome or complex regional pain syndrome. Apart from conservative treatment interventional methods are useful in t
PMID 26377982

Superior hypogastric plexus combined with ganglion impar neurolytic blocks for pelvic and/or perineal cancer pain relief.

Ahmed DG1, Mohamed MF, Mohamed SA.
Pain physician.Pain Physician.2015 Jan-Feb;18(1):E49-56.
BACKGROUND: The superior hypogastric plexus (SHGP) carries afferents from the viscera of the lower abdomen and pelvis. Neurolytic block of this plexus is used for reducing pain resulting from malignancy in these organs. The ganglion impar (GI) innervats the perineum, distal rectum, anus, distal uret
PMID 25675070

高野正博
日本腰痛学会雑誌 11(1), 186-192, 2005
従来，仙骨痛，仙尾関節痛，尾骨痛などと言われる慢性疼痛の症状があった．しかしよく診察すると陰部神経に沿って圧痛ある硬結を触れ，この痛みの部位と性質は患者の訴えと一致することが分かった．この中には肛門括約不全の症例が多く肛門内圧も有意に低下し，また排便障害の症例も多く，直腸肛門機能障害がみられる．加えて過敏性腸症候群様の腹部症状もみられる．以上，直腸肛門痛，括約不全，排便障害，腹部症状を四症状とし， …
NAID 130000136071