pivot joint

　

WordNet

1. a freely moving joint in which movement is limited to rotation; "the articulation of the radius and ulna in the arm is a pivot joint" (同)rotary joint, rotatory joint, articulatio trochoidea
2. come into the company of; "She joined him for a drink"
3. cause to become joined or linked; "join these two parts so that they fit together" (同)bring together
4. make contact or come together; "The two roads join here" (同)conjoin
5. become part of; become a member of a group or organization; "He joined the Communist Party as a young man" (同)fall_in, get together
6. united or combined; "a joint session of Congress"; "joint owners"
7. marijuana leaves rolled into a cigarette for smoking (同)marijuana cigarette, reefer, stick, spliff
8. a disreputable place of entertainment
9. junction by which parts or objects are joined together
10. (anatomy) the point of connection between two bones or elements of a skeleton (especially if it allows motion) (同)articulation, articulatio
11. provide with a joint; "the carpenter jointed two pieces of wood" (同)articulate
12. affecting or involving two or more; "joint income-tax return"; "joint ownership"
13. fasten with a joint
14. fit as if by joints; "The boards fit neatly"
15. involving both houses of a legislature; "a joint session of Congress"
16. separate (meat) at the joint
17. turn on a pivot (同)swivel
18. axis consisting of a short shaft that supports something that turns (同)pin
19. the act of turning on (or as if on) a pivot; "the golfer went to the driving range to practice his pivot"
20. the person in a rank around whom the others wheel and maneuver (同)pivot man
21. the act of bringing two things into contact (especially for communication); "the joining of hands around the table"; "there was a connection via the internet" (同)connection, connexion
22. having joints or jointed segments;

PrepTutorEJDIC

1. 〈二つ以上のもの〉‘を'『つなぐ』,結合する《+『名』+『together』(『up』)》;(…に)…‘を'つなぐ《+『名』+『to』(『onto』)+『名』》 / (線などで)〈二つ以上のもの〉‘の'間を結ぶ(つなぐ)《+『名』+『by』(『with』)+『名』》 / (友情・結婚などで)〈人〉‘を'結びつける《+『名』+『in』+『名』》 / 〈川・道などが〉…‘と'いっしょになる,合流する / 〈会など〉‘に'『加入する』 / (…で)〈人〉‘の'『仲間に入る』,‘と'いっしょになる《+『名』〈人〉+『in』(『for』)+『名』,+『名』〈人〉+『in』do『ing』》 / (…に)『加わる』《+『in』+『名』〈事〉/+『in』 『with』+『名』〈人〉》 / (人と…を)『ともにする』《+『with』+『名』〈人〉+『in』+『名』(doing)》 / 〈川・道などが〉『いっしょになる』,合流する / 接合箇所(点,面,線);継ぎ目
2. 『関節』 / 『継ぎ目』,接合箇所,合わせ目 / 継ぎ目と継ぎ目の間の部分,節 / (二つの部分を継いだり支えたりするのに用いる)継ぎ手,ジョイント / (枝や葉の)つけ根,節 / (骨付きの)肉の大切り身 / 《俗》安酒場,とばく宿,アヘン窟(くつ) / 『共同の』,共有の;連帯の,連合の / 両院合同の;二院制議会の両院の / …‘を'継ぎ合わせる;…‘を'継ぎ目(関節)でつなぐ / …‘を'継ぎ目で分ける;〈鳥・肉など〉‘を'関節で切り分ける
3. (機械の)旋回軸 / 中心人物;要点,かなめ / 旋回 / (…を軸にして)旋回する;回転する《+『on』(『upon』)+『名』》 / 《『pivot on』(『upon』)+『名』》…によって決まる,…に左右される / …‘を'旋回軸の上に恥く;…‘に'旋回軸をつける
4. 継ぎ目のある;関節のある

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/02/10 12:06:57」(JST)

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[Wiki en表示]

Pivot joint
1: Ball and socket joint; 2: Condyloid joint (Ellipsoid); 3: Saddle joint; 4 Hinge joint; 5: Pivot joint;
Latin	articulatio trochoidea
Gray's	subject #70 285

A pivot joint (trochoid joint, rotary joint, Lateral Ginglymus) is a type of diarthrosis. In pivot joints, the axis of a convex articular surface is parallel with the longitudinal axis of the bone.

Pivot and hinge joints can be both considered cylindrical joints.

Movements

Pivot joints allow for rotation, which can be external (for example when rotating an arm outward), or internal (as in rotating an arm inward). When rotating the forearm, these movements are typically called pronation and supination. In the standard anatomical position, the forearms are supinated, which means that the palms are facing forward, and the thumbs are pointing away from the body. In contrast, a forearm in pronation would have the palm facing backward and the thumb would be closer to the body, pointing medially.

Examples

Examples of a pivot joint include:

• Proximal radioulnar joint
• Distal radioulnar joint
• Median atlanto-axial joint
• The Head

In contrast, spherical joints (or ball and socket joints) such as the hip joint permit rotation and all other directional movement, while pivot joints only permit rotation.

References

External links

• Synovial Joints-Pivot Joints from The University of Michigan Medical School

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

Eva Salugsugan

UpToDate Contents

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English Journal

• Distal ulna arthroplasties.

• Rekant M.SourceDepartment of Orthopaedic Surgery, Thomas Jefferson University, PA, USA. Electronic address: mrekant@comcast.net.
• Hand clinics.Hand Clin.2012 Nov;28(4):611-5. doi: 10.1016/j.hcl.2012.08.016.
• The distal radioulnar joint (DRUJ) is the distal link between the radius and the ulna, and forms a pivot for forearm pronation and supination. As well as being susceptible to idiopathic arthritis, any injury or deformity of the DRUJ involving the radius or ulna can alter the function of this joint.
• PMID 23101611

• Radical prostatectomy and observation did not differ for mortality in localized prostate cancer.

• Dahm P, Gilbert S.AbstractQUESTION What is the relative efficacy of radical prostatectomy compared with observation for mortality in men with localized prostate cancer? METHODS DESIGN Randomized controlled trial (Prostate Cancer Intervention versus Observation Trial [PIVOT]). ClinicalTrials.gov NCT00007644. ALLOCATION Concealed.* BLINDING Blinded* (outcome assessors). FOLLOW-UP PERIOD Median 10 years. SETTING 44 Department of Veterans Affairs and 8 National Cancer Institute sites in the USA. PATIENTS 731 men ≤ 75 years of age (mean age 67 y, median prostate-specific antigen [PSA] level 7.8 ng/mL) with histologically confirmed, clinically localized, prostate cancer (stage T1-T2NxM0 in the tumor-node-metastasis classification system of the American Joint Committee on Cancer) of any grade diagnosed in the previous 12 months; PSA level < 50 ng/mL; negative bone scan for metastatic disease; life expectancy ≥ 10 years; and medically fit for radical prostatectomy. INTERVENTION Radical prostatectomy (n = 364) or observation, with an offer of palliative therapy or chemotherapy for symptomatic or metastatic progression (n = 367). OUTCOMES Primary outcome was all-cause mortality. Secondary outcomes were prostate cancer mortality (definitely or probably due to prostate cancer or prostate cancer treatment) and bone metastases. 740 men, enrolled over 7 years with 8 years of follow-up, were required to detect a 25% relative reduction in all-cause mortality with 91% power (α = 0.05) assuming median survival of 10 years. PATIENT FOLLOW-UP 100% (intention-to-treat analysis). MAIN RESULTS Radical prostatectomy and observation did not differ for all-cause mortality or prostate cancer mortality (Table). Prespecified subgroup analyses showed that prostatectomy reduced all-cause mortality more than observation in patients with PSA levels > 10 ng/mL (relative risk reduction 23%, 95% CI 4 to 40) but not those with PSA levels ≤ 10 ng/mL (relative risk increase 2%, CI -17 to 24, P = 0.04 for interaction). The radical prostatectomy group had a lower risk for bone metastases (Table). CONCLUSION In men with localized prostate cancer, radical prostatectomy did not differ from observation for all-cause or prostate cancer mortality.Radical prostatectomy (RP) vs observation (obs) for prostate cancer†OutcomesRPObsAt a median 10 yRRR (95% CI)NNT (CI)All-cause mortality47%50%9% (-5 to 22)NSProstate cancer mortality‡5.8%8.4%36% (-9 to 63)NSBone metastases4.7%11%59% (29 to 77)17 (13 to 33)†NS = not significant; other abbreviations defined in Glossary. RRR, NNT, and CI calculated from control event rates and hazard ratios in article.‡Mortality definitely or probably due to prostate cancer or prostate cancer treatment.
• Annals of internal medicine.Ann Intern Med.2012 Oct 16;157(8):JC4-5. doi: 10.7326/0003-4819-157-8-201210160-02005.
• QUESTION What is the relative efficacy of radical prostatectomy compared with observation for mortality in men with localized prostate cancer METHODS DESIGN Randomized controlled trial (Prostate Cancer Intervention versus Observation Trial [PIVOT]). ClinicalTrials.gov NCT00007644. ALLOCATION Conce
• PMID 23070507

Japanese Journal

• Correlation between quantitative pivot shift and generalized joint laxity: a prospective multicenter study of ACL ruptures

• Knee Surgery Sports Traumatology Arthroscopy 26(8), 2362-2370, 2018-08
• NAID 120006496806

• 早川家住宅における建築関係史料と濃尾地震後の耐震対策について

• 日本建築学会計画系論文集 83(748), 1099-1107, 2018-06-30
• NAID 130007386361

• 投球動作のEarly Cocking期における軸足股関節の運動学・運動力学的特徴

• 日本臨床スポーツ医学会誌 25(1), 16-23, 2017
• NAID 40021084338

Related Links

• Pivot joint | skeleton | Britannica.com

Pivot joint: Pivot joint, in vertebrate anatomy, a freely moveable joint (diarthrosis) that allows only rotary movement around a single axis. The moving bone rotates within a ring that is formed from a second bone and adjoining ligament.

• pivot jointの意味 - goo辞書 英和和英

pivot jointとは。意味や和訳。《解剖》車軸関節（ ある骨の周りと別の骨が回転できるようになっている関節） - 80万項目以上収録、例文・コロケーションが豊富な無料英和和英辞典。

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★リンクテーブル★

リンク元	「車軸関節」
関連記事	「join」「pivot」「joint」

「車軸関節」

　　[★]

英

()

同

pivotjoint

英

pivot joint

同

pivotjoint

「join」

　　[★]

• v.

• 連結する、結合する、参加する

関

associate、attend、bind、binding、bond、bonding、catenate、combine、concatenation、conjoin、conjugate、conjugation、conjunction、connect、connection、couple、dock、engage、engagement、juncture、ligate、ligation、link、linkage、participation、symphysial、union

PHP

implode() のエイリアス

　 　 　 　 　

「pivot」

　　[★]

• n.

• 回転軸、ピボット、中心点、旋回軸

関

rotation axis

　 　 　 　 　

「joint」

　　[★]

• n.

• 関節