flexor digitorum profundus

深指屈筋

WordNet

1. exhibit the strength of; "The victorious army flexes its invincibility"
2. the act of flexing; "he gave his biceps a flex to impress the ladies"
3. bend a joint; "flex your wrists"; "bend your knees" (同)bend
4. cause (a plastic object) to assume a crooked or angular form; "bend the rod"; "twist the dough into a braid"; "the strong man could turn an iron bar" (同)bend, deform, twist, turn
5. contract; "flex a muscle"

PrepTutorEJDIC

1. (仕事などを始める準備運動として)〈手足など〉‘を'曲げる,〈筋肉〉‘を'縮める
2. 電線,電気のコード

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/02/04 19:13:33」(JST)

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Flexor digitorum profundus muscle
Ventral view of the deep muscles of the forearm. FDP is shown in blue.
Details
Origin	upper 3/4 of the anterior and medial surfaces of the body of the ulna, interosseous membrane and deep fascia of the forearm
Insertion	base of the distal phalanges of the fingers
Artery	anterior interosseous artery
Nerve	median (anterior interosseous), muscular branches of ulnar
Actions	flex hand and both interphalangeal joints
Antagonist	Extensor digitorum muscle
Identifiers
Latin	Musculus flexor digitorum profundus
TA	A04.6.02.036
FMA	38478
Anatomical terms of muscle [edit on Wikidata]

In human anatomy, the flexor digitorum profundus (FDP, Latin for "deep bender of the fingers") is a muscle in the forearm that flexes the fingers (also known as digits). It is considered an extrinsic hand muscle because it acts on the hand while its muscle belly is located in the forearm. Together the flexor pollicis longus, pronator quadratus, and flexor digitorum profundus form the deep layer of ventral forearm muscles.

Structure

Flexor digitorum profundus originates in the upper 3/4 of the anterior and medial surfaces of the ulna, interosseous membrane and deep fascia of the forearm. The muscle fans out into four tendons (one to each of the second to fifth fingers) to the palmar base of the distal phalanx.

Along with the flexor digitorum superficialis, it has long tendons that run down the arm and through the carpal tunnel and attach to the palmar side of the phalanges of the fingers.

Flexor digitorum profundus lies deep to the superficialis, but it attaches more distally. Therefore, profundus's tendons go through the tendons of superficialis, and end up attaching to the distal phalanx. For this reason profundus is also called the perforating muscle.

The lumbricals of the hand arise from the radial side of its tendons.

Innervation

Flexor digitorum profundus is a composite muscle innervated by the anterior interosseous nerve and ulnar nerves.

• The medial aspect of the muscle (which flexes the 4th and 5th digit) is supplied by the ulnar nerve (C8, T1)
• The lateral aspect (which flexes the 2nd and 3rd digit) is innervated by the median nerve specifically the anterior interosseous branch (C8, T1).

It is one of two flexor muscles that is not exclusively supplied by the median nerve (the other is flexor carpi ulnaris).

Variations

The tendon of the index finger often has a separate muscle belly.

Function

Flexor digitorum profundus is a flexor of the wrist (midcarpal), metacarpophalangeal and interphalangeal joints. The lumbricals, intrinsic muscles of the hand, attach to the tendon of flexor digitorum profundus. Thus, the flexor muscle is utilised to aid the lumbrical muscles in their role as extensors of the interphalangeal joints. As the lumbrical muscles originate on the palmar side of the hand and attach on the dorsal aponeurosis, power is transferred from the flexor digitorum profundus muscle to fully extend the fingers as well as flex the metacarpophalangeal joints.

The tension generated by flexor digitorum profundus at the more distal joints is determined by wrist position. Flexion of the wrist causes muscle shortening at that point, reducing tension that can be generated more distally. Fingers cannot be fully flexed if the wrist is fully flexed.

Other animals

In many primates, the FDP is fused with the flexor pollicis longus (FPL). In great apes the belly of the FDP has a separate tendon for the FDP. In lesser apes, both muscles have separate bellies in the forearm, but in Old World monkeys they separate in the carpal tunnel. The lack of differentiation in the FDP musculature in baboons makes it unlikely that this monkey can control individual fingers independently.

Additional images

Front of the left forearm. Deep muscles.  Cross-section through the middle of the forearm.  Posterior surface of the forearm. Deep muscles.  Transverse section across distal ends of radius and ulna.  Transverse section across the wrist and digits.  The mucous sheaths of the tendons on the front of the wrist and digits.  Ulnar and radial arteries. Deep view.  Tendons of forefinger and vincula tendina. (Flexor digitorum profundus labeled at bottom right.)  Flexor digitorum profundus muscle  Flexor digitorum profundus muscle  Flexor digitorum profundus muscle  Flexor digitorum profundus muscle  Flexor digitorum profundus muscle  Flexor digitorum profundus muscle  Flexor digitorum profundus muscle  Flexor digitorum profundus muscle  Flexor digitorum profundus muscle

Notes

References

• Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol. 1: Locomotor System (5th ed.). Thieme. ISBN 3-13-533305-1. 
• Tocheri, MW; Orr, CM; Jacofsky, MC; Marzke, MW. (April 2008). "The evolutionary history of the hominin hand since the last common ancestor of Pan and Homo". J Anat. 212 (4): 544–62. doi:10.1111/j.1469-7580.2008.00865.x. PMC 2409097. PMID 18380869.  (Abstract, PubMed) (PDF, Smithsonian)

External links

• Illustration: upper-body/flexor-digitorum-profundus from The Department of Radiology at the University of Washington

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

• 1. 遠位指節間関節の屈筋腱の損傷 （ジャージー指） flexor tendon injury of the distal interphalangeal joint jersey finger
• 2. 指、手、および手首の骨折の概要 overview of finger hand and wrist fractures
• 3. 指脱臼の整復 digit dislocation reduction
• 4. 筋骨格損傷部の副子固定 splinting of musculoskeletal injuries

English Journal

• Forearm muscle oxidative capacity index predicts sport rock-climbing performance.

• Fryer S1, Stoner L2, Stone K3, Giles D4, Sveen J5, Garrido I6, España-Romero V6.
• European journal of applied physiology.Eur J Appl Physiol.2016 Aug;116(8):1479-84. doi: 10.1007/s00421-016-3403-1. Epub 2016 Jun 2.
• Rock-climbing performance is largely dependent on the endurance of the forearm flexors. Recently, it was reported that forearm flexor endurance in elite climbers is independent of the ability to regulate conduit artery (brachial) blood flow, suggesting that endurance is not primarily dependent on th
• PMID 27255506

• Tendon Transfers in the Rheumatoid Hand for Reconstruction.

• O'Sullivan MB1, Singh H1, Wolf JM2.
• Hand clinics.Hand Clin.2016 Aug;32(3):407-16. doi: 10.1016/j.hcl.2016.03.014. Epub 2016 Jun 3.
• Long-standing rheumatoid arthritis can result in spontaneous tendon rupture caused by attrition of the tendons. Ruptures of the ulnar-sided extensor tendons, flexor pollicis longus, and the flexor digitorum profundus can be seen. Primary repair of these tendon ruptures is frequently not possible bec
• PMID 27387084

• Cadaveric Investigation of Active Finger Range of Motion for Detection of Intratendinous Needle Placement.

• Starr HM Jr1, Tsai MA, Parks BG, Means KR Jr.
• Plastic and reconstructive surgery.Plast Reconstr Surg.2016 Aug;138(2):268e-72e. doi: 10.1097/PRS.0000000000002370.
• BACKGROUND: The authors' purpose was to determine if investigators can predict whether a needle is within a finger's flexor tendon by postinsertion tactile and visualization evaluation in an active range-of-motion cadaver model.METHODS: In 48 cadaver fingers, a 25-gauge needle, with a 1-cc syringe a
• PMID 27465189

Japanese Journal

• 臨床室 末節骨内軟骨腫による深指屈筋腱停止部裂離骨折の1例

• 南野 光彦,澤泉 卓哉
• 整形外科 62(12), 1257-1277, 2011-11
• NAID 40019029578

• 症例 示指深指屈筋腱のST関節内嵌頓の1例

• 白川 健,代田 雅彦,菅田 祐美
• 整形・災害外科 54(3), 305-308, 2011-03
• NAID 40018740938

Related Links

• Flexor Digitorum Profundus Origin, Anatomy & Function ...

The flexor digitorum profundus helps flex the fingers. The muscle originates in the upper part of the ulna bone. It inserts at the distal phalanges in the tips of the fingers. The muscle’s belly is located in the forearm. However, it is ...

• Flexor Digitorum Profundus - UW Department of Radiology

Flexor Digitorum Profundus Flexor Digitorum Superficialis Flexor Pollicis Brevis Flexor Pollicis Longus Infraspinatus Interosseous Muscles, Dorsal Interosseous Muscles, Palmar Latissimus Dorsi Levator Scapulae Opponens Digiti ...

Related Pictures

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★リンクテーブル★

リンク元	「深指屈筋」「FDP」「深指屈筋腱」
関連記事	「flex」「flexor」「digitorum」

「深指屈筋」

　　[★]

英

flexor digitorum profundus (K) FDP, flexor digitorum profundus muscle, deep flexor muscle of finger

ラ

musculus flexor digitorum profundus

関

浅指屈筋

起始

• 尺骨(上部1/3の前面)

停止

• 第2-5指骨(末節骨の両側)

神経

• 正中神経(第2-3指)、尺骨神経(第4-5指)

機能

• 第2-5指の屈曲(DIP関節)、手関節掌屈

浅指屈筋、深指屈筋、長母指屈筋

「FDP」

　　[★]

• フィブリン分解産物 fibrin degradation product
• 深指屈筋 flexor digitorum profundus

同

フィブリン/フィブリノゲン分解産物

「深指屈筋腱」

　　[★]

ラ

flexor digitorum profundus

「flex」

　　[★]

• n.

• 屈曲

• v.

• 曲がる、曲げる

関

bend、bending、curvature、curve、flexion、inflection

　 　 　 　 　 　 　

「flexor」

　　[★]

• n.

• 屈筋、屈側の、屈側性

関

flexor muscle

「digitorum」

　　[★]

• extensor digitorum longus muscle