WordNet

belonging to or on or near the back or upper surface of an animal or organ or part; "the dorsal fin is the vertical fin on the back of a fish and certain marine mammals"
any of the deeper and thicker fascia that attach muscles to bones; resemble flattened tendons

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(植物の)背部の,背の

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/07/24 11:47:00」(JST)

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An extensor expansion (dorsal expansion, dorsal hood, dorsal aponeurosis^{[citation needed]}) is the special connective attachments by which the extensor tendons insert into the phalanges.

These flattened tendons (aponeurosis) of extensor muscles span the proximal and middle phalanges.^[1]

At the distal end of the metacarpal, the extensor tendon will expand to form a hood, which covers the back and sides of the head of the metacarpal and the proximal phalanx.

Bands

The expansion soon divides into three bands:

lateral bands pass on either side of the proximal phalanx and stretch all the way to the distal phalanx. The lumbricals of the hand, extensor indicis muscle,^[2] dorsal interossei of the hand, and palmar interossei insert on these bands.
A single median band passes down the middle of the finger along the back of the proximal phalanx, ending at the base of the middle phalanx.
A band known as the retinacular ligament runs obliquely along the middle phalanx, and connects the fibrous digital sheath on the anterior side of the phalanges to the extensor expansion.

References

^ "eMedicine - Hand, Tendon Lacerations: Extensors : Article by D Glynn Bolitho, MD, PhD, FACS". Retrieved 2008-01-20. ^{[not in citation given]}
^ Kyung Won, PhD. Chung (2005). Gross Anatomy (Board Review). Hagerstown, MD: Lippincott Williams & Wilkins. p. 43. ISBN 0-7817-5309-0.

External links

lesson5musofpostforearm at The Anatomy Lesson by Wesley Norman (Georgetown University)
Hand kinesiology at the University of Kansas Medical Center

This human musculoskeletal system article is a stub. You can help Wikipedia by expanding it.

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English Journal

Medial gastrocnemius muscle growth during adolescence is mediated by increased fascicle diameter rather than by longitudinal fascicle growth.

Weide G1,2, Huijing PA1, Maas JC2, Becher JG2, Harlaar J2, Jaspers RT1.
Journal of anatomy.J Anat.2015 Jun;226(6):530-41. doi: 10.1111/joa.12306. Epub 2015 Apr 16.
Using a cross-sectional design, the purpose of this study was to determine how pennate gastrocnemius medialis (GM) muscle geometry changes as a function of adolescent age. Sixteen healthy adolescent males (aged 10-19 years) participated in this study. GM muscle geometry was measured within the mid
PMID 25879671

Anatomical basis of the reverse lateral plantar artery perforator flap design.

Li L1, Song D, Zheng H, Hou C, Lin J, Xie Z, Zhuang Y.
Surgical and radiologic anatomy : SRA.Surg Radiol Anat.2015 Jan 23. [Epub ahead of print]
BACKGROUND: This study aims to explore the characteristics of the formation and topography of lateral plantar artery perforators to identify a repair procedure for defects in the forefoot region.METHODS: Thirty-three cadavers were available for this anatomical study. The tuberosity of the fifth meta
PMID 25613791

Mechanical properties vary for different regions of the finger extensor apparatus.

Qian K1, Traylor K1, Lee SW2, Ellis B3, Weiss J4, Kamper D5.
Journal of biomechanics.J Biomech.2014 Sep 22;47(12):3094-9. doi: 10.1016/j.jbiomech.2014.06.035. Epub 2014 Jul 5.
The extensor apparatus, an aponeurosis that covers the dorsal side of each finger, transmits force from a number of musculotendons to the phalanges. Multiple tendons integrate directly into the structure at different sites and the extensor apparatus attaches to the phalanges at multiple points. Thus
PMID 25042330

Japanese Journal

脳性運動障害に対する痙縮軽減と抗重力屈曲運動の発現を目的とした刺激方法の試み

黒橋佳洋,島欽也,羽山和生
理学療法学 30(2), 29-34, 2003-04-20
成人脳性麻痺者に対する治療経験から,痙縮の軽減および4ヵ月以降の正常乳児にみられる背臥位における正中位ヘの抗重力屈曲運動を引き出す2つの刺激方法を考案した。まず第1の手技は痙縮軽減を目的として,胸背部の特定の部位に5分間の持続した圧迫刺激を行った。第2の手技では抗重力屈曲運動を出現させることを目的として,足底腱膜の踵骨付着部を外側から持続的に圧迫刺激を行った。第1の手技に対しては,脳性運動障害者1 …
NAID 110003993139

身体運動における筋収縮のバイオメカニクス

福永哲夫
体育學研究 42(5), 337-348, 1998-01-10
… Using real time ultrasonography, we were able to observe clearly and noninvasively the movement of the fascicle and aponeurosis in human muscle in vivo, and measure directly the changes in pennation angle and fascicle length during muscle contraction. … During dorsal and plantar flexion without additional load, the movement of tendinous tissue in the tibialis anterior muscle (TA) appeared to synchronize with the displacement of the ankle joint. …
NAID 110001918662

動物園の熊に寄生した蛔虫Toxascaris transfuga (Rudolphi,1819) Baylis et Daubney,1922について

大越伸 [他],高塩満男,中川志郎
日本獸醫學雜誌 24(3), 151-155, 1962-06-25
… and II.From the tendinous rcphe, theinsertion of 1 1 8A.Postero-laieral border of ischium,posfericr fo the origin of 136 andinferior to that of 132.Aniero-[aiera[ border of ilium.Dorsal portion of ilium, [ust belowCrjs?a rransversa and superior toAcetabulum.Fovea iliaca dorsalis of ilium.Aniero-lateral border of ilium, ustposiericr to the origin of l20A.Aniero-mediaj surface of femur.Lateral surface of femoral shaft.Laieral surFace of femoral shaft.This origin is surrounded by rheorigin of 125.zMedia] surface of ferooral shaft,Lateral side of Processus …
NAID 110003978117

「指背腱膜」

Extensor expansion
	Tendons of forefinger and vincula tendina. (Extensor expansion not labeled, but region is visible.)
	Anatomical terminology [edit on Wikidata]