WordNet

of or relating to or near the part of the back between the ribs and the hipbones; "lumbar vertebrae"
either side of the backbone between the hipbone and the ribs in humans as well as quadrupeds (同)lumbus
a cut of meat taken from the side and back of an animal between the ribs and the rump

PrepTutorEJDIC

腰の,腰部の
《複数形で》腰,腰部 / 〈C〉〈U〉腰肉

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/10/14 20:11:28」(JST)

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In tetrapod anatomy, lumbar is an adjective that means of or pertaining to the abdominal segment of the torso, between the diaphragm and the sacrum (pelvis). The lumbar region is sometimes referred to as the lower spine, or as an area of the back in its proximity.

Structure

In human anatomy the five vertebrae in the lumbar region of the back are the largest and strongest in the movable part of the spinal column, and can be distinguished by the absence of a foramen in the transverse process, and by the absence of facets on the sides of the body. In most mammals, the lumbar region of the spine curves outward.

The actual spinal cord (medulla spinalis) terminates between vertebrae one and two of this series, called L1 and L2. The nervous tissue that extends below this point are individual strands that collectively form the cauda equina. In between each lumbar vertebra a nerve root exits, and these nerve roots come together again to form the largest single nerve in the human body, the sciatic nerve. The sciatic nerve runs through the back of each leg and into the feet. This is why a disorder of the low back that affects a nerve root, such as a spinal disc herniation, can cause pain that radiates along the sciatic nerve (sciatica) down into the foot.

There are several muscles in the low back that assist with rotation, flexibility and strength. These muscles are susceptible to injury, especially while lifting heavy objects, or lifting while twisting. A low back muscle strain can be extremely painful but will usually heal within a few days or weeks.

The lumbar portion of the spine bears the most body weight and also provides the most flexibility, a combination that makes it susceptible to injury and wear and tear over time. This is why low back pain is so prevalent.^{[citation needed]}

References

External links

Lumbar Medical Manipulations Laminectomy, Surgery and Recovery Time.
Lower back pain information

UpToDate Contents

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1. 急性腰仙部神経根障害：病態生理、臨床的特徴、および診断 acute lumbosacral radiculopathy pathophysiology clinical features and diagnosis
2. 腰部脊柱管狭窄症：病態生理、臨床的特徴、および診断 lumbar spinal stenosis pathophysiology clinical features and diagnosis
3. 成人における選択的脊椎手術のための麻酔 anesthesia for elective spine surgery in adults
4. 急性腰仙部神経根障害：治療および予後 acute lumbosacral radiculopathy treatment and prognosis
5. 小児および思春期における腰痛：原因の概要 back pain in children and adolescents overview of causes

English Journal

Thoracic and lumbar posture behaviour in sitting tasks and standing: Progressing the biomechanics from observations to measurements.

Claus AP1, Hides JA2, Moseley GL3, Hodges PW4.
Applied ergonomics.Appl Ergon.2016 Mar;53 Pt A:161-8. doi: 10.1016/j.apergo.2015.09.006. Epub 2015 Oct 21.
Few studies quantify spinal posture behaviour at both the thoracolumbar and lumbar spinal regions. This study compared spontaneous spinal posture in 50 asymptomatic participants (21 males) during three conditions: 10-min computer task in sitting (participants naïve to the measure), during their per
PMID 26476893

Incremental training intensities increases loads on the lower back of elite female rowers.

Buckeridge EM1,2,3, Bull AM2, McGregor AH1.
Journal of sports sciences.J Sports Sci.2016 Feb;34(4):369-78. doi: 10.1080/02640414.2015.1056821. Epub 2015 Jun 19.
Lumbar-pelvic kinematics change in response to increasing rowing stroke rates, but little is known about the effect of incremental stroke rates on changes in joint kinetics and their implications for injury. The purpose of this study was to quantify the effects of incremental rowing intensities on l
PMID 26090702

Caffeine stimulates locomotor activity in the mammalian spinal cord via adenosine A1 receptor-dopamine D1 receptor interaction and PKA-dependent mechanisms.

Acevedo J1, Santana-Almansa A1, Matos-Vergara N1, Marrero-Cordero LR1, Cabezas-Bou E1, Díaz-Ríos M2.
Neuropharmacology.Neuropharmacology.2016 Feb;101:490-505. doi: 10.1016/j.neuropharm.2015.10.020. Epub 2015 Oct 19.
Caffeine is a potent psychostimulant that can have significant and widely variable effects on the activity of multiple neuronal pathways. The most pronounced caffeine-induced behavioral effect seen in rodents is to increase locomotor activity which has been linked to a dose-dependent inhibition of A
PMID 26493631

Cerebrospinal Fluid Diversion in Endoscopic Skull Base Reconstruction: An Evidence-Based Approach to the Use of Lumbar Drains.

Tien DA1, Stokken JK2, Recinos PF3, Woodard TD3, Sindwani R4.
Otolaryngologic clinics of North America.Otolaryngol Clin North Am.2016 Feb;49(1):119-29. doi: 10.1016/j.otc.2015.09.007.
Before the vascularized pedicled nasoseptal flap was popularized, lumbar drains (LDs) were routinely used for cerebral spinal fluid (CSF) diversion in endoscopic skull base reconstruction. LDs are not necessary in most CSF leaks encountered during skull base surgery. In this article, the use is cons
PMID 26614832

Japanese Journal

Farmers' Cohort for Agricultural Work-Related Musculoskeletal Disorders (FARM) Study: Study Design, Methods, and Baseline Characteristics of Enrolled Subjects

Journal of Epidemiology advpub(0), 2016
NAID 130005090523

矢状面バランスを失った成人脊柱変形症例の手術で目指すべきアライメント : 代償のないアライメントを目指して (シンポジウム成人脊柱変形へのアプローチ)

臨床整形外科 50(11), 1059-1064, 2015-11
NAID 40020630938

腰椎後弯変形患者の腰背筋評価 (シンポジウム成人脊柱変形へのアプローチ)

臨床整形外科 50(11), 1053-1058, 2015-11
NAID 40020630902

経験と考察不安定性を有する腰部脊柱管狭窄症に対する多椎間制動術は多椎間除圧術の問題点を解消できるか : 2椎間での検討

整形外科 = Orthopedic surgery 66(12), 1237-1241, 2015-11
NAID 40020625022

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リンク元	「100Cases 10」「loin」「腰部」「腰椎部」「lumbar region」
拡張検索	「lumbar disc herniation」「lumbar disk herniation」