乳頭筋
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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/05/16 16:32:28」(JST)
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| Papillary muscle |
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| Interior of right side of heart. Papillary muscles labeled in purple. |
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Diagram showing relations of opened heart to front of thoracic wall.
Ant. Anterior segment of tricuspid valve.
A O. Aorta.
A.P. Anterior papillary muscle.
In. Brachiocephalic artery (Innominate).
L.C.C. Left common carotid artery.
L.S. Left subclavian artery.
L.V. Left ventricle.
P.A. Pulmonary artery.
R.A. Right atrium.
R.V. Right ventricle.
V.S. Ventricular septum. |
| Latin |
musculus papillaris |
| Gray's |
subject #138 532 |
In anatomy, the papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves (a.k.a. the mitral and tricuspid valves) via the chordae tendinae and contract to prevent inversion or prolapse of these valves.[1][2]
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Contents
- 1 Action
- 2 Rupture
- 3 Additional images
- 4 See also
- 5 References
- 6 External links
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Action [edit]
There are five total papillary muscles in the heart, three in the right ventricle and two in the left. The anterior, posterior, and septal papillary muscles of the right ventricle each attach via chordae tendineae to the tricuspid valve. The anterior and posterior papillary muscles of the left ventricle attach via chordae tendineae to the mitral valve.[3]
The papillary muscles of both the right[1] and the left[2] ventricles begin to contract shortly before ventricular systole and maintain tension throughout. This prevents regurgitation--backward flow of ventricular blood into the atrial cavities--by bracing the atrioventricular valves against prolapse--being forced back into the atria by the high pressure in the ventricles.[1]
Rupture [edit]
Papillary muscle rupture, as can be caused by a heart infarct, and dysfunction, as can be caused by ischemia, can both lead to the complication of mitral valve prolapse.[4]
Additional images [edit]
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Section of the heart showing the ventricular septum.
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Schematic representation of the atrioventricular bundle of His.
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Heart normal short axis echo
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Heart short axis view papillary
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Papillary muscles and chordae tendinae
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Papillary muscles and chordae tendinae
See also [edit]
References [edit]
- ^ a b c Moore, K.L., & Agur, A.M. (2007). Essential Clinical Anatomy: Third Edition. Baltimore: Lippincott Williams & Wilkins. 92. ISBN 978-0-7817-6274-8
- ^ a b Moore, K.L., & Agur, A.M. (2007). Essential Clinical Anatomy: Third Edition. Baltimore: Lippincott Williams & Wilkins. 94. ISBN 978-0-7817-6274-8
- ^ Netter's Atlas of Human Anatomy, plates 216B and 217A
- ^ Page 40 in:Elizabeth D Agabegi; Agabegi, Steven S. (2008). Step-Up to Medicine (Step-Up Series). Hagerstwon, MD: Lippincott Williams & Wilkins. ISBN 0-7817-7153-6.
External links [edit]
- papillary+muscle at eMedicine Dictionary
- SUNY Labs 20:19-0106 - "Heart: The Right Atrioventricular (Tricupsid) Valve" (anterior, posterior, septal papillary muscles)
- SUNY Labs 20:26-0105 - "Heart: The Left Atrioventricular (Mitral) Valve" (anterior, posterior papillary muscles)
- -1368719301 at GPnotebook
- Bioweb at UWLAX Human heart model (left internal anatomy)
- Atlas of anatomy at UMich ht_rt_vent - "Right atrioventricular bundle branch, anterior view"
- Definition of Papillary muscle
- MedicineNet Search Results
- Visit the educational website www.themitralvalve.org
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Anatomy of torso, cardiovascular system: heart (TA A12.1, TH H3.09.01, GA 5.524)
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| General |
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Surface
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base · apex · grooves (coronary/atrioventricular, interatrial, anterior interventricula, posterior interventricular) · surfaces (sternocostal, diaphragmatic) · borders (right, left) · Openings of smallest cardiac veins
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Internal
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atria (interatrial septum, musculi pectinati, sulcus terminalis) · ventricles (interventricular septum, trabeculae carneae, chordae tendineae, papillary muscle) · valves · cusps · Atrioventricular septum
cardiac skeleton
Intervenous tubercle
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| Chambers |
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Right heart
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(venae cavae, coronary sinus) → right atrium (atrial appendage, fossa ovalis, limbus of fossa ovalis, crista terminalis, valve of inferior vena cava, valve of coronary sinus) → tricuspid valve → right ventricle (conus arteriosus, moderator band/septomarginal trabecula) → pulmonary valve → (pulmonary artery and pulmonary circulation)
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Left heart
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(pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus) → (aorta and systemic circulation)
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| Layers |
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Endocardium
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Heart valves
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Myocardium
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Conduction system: Cardiac pacemaker · SA node · AV node · bundle of His · Purkinje fibers
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Pericardial cavity
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Pericardial sinus
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Pericardium
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fibrous pericardium (Sternopericardiac ligaments) · serous pericardium (epicardium/visceral layer) · Fold of the left vena cava
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noco/cong/tumr, sysi/epon, injr
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proc, drug (C1A/1B/1C/1D), blte
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English Journal
- Positions of septal papillary muscles in human hearts.
- Jezyk D1, Duda B, Jerzemowski J, Grzybiak M.
- Folia morphologica.Folia Morphol (Warsz).2010 May;69(2):101-6.
- Septal papillary muscles, similarly to other papillary muscles, are essential elements of the heart valvular system. Damage to their structure may lead to a considerable life risk. Of all the papillary muscles, the septal papillary muscles are characterized by the greatest topographical and morpholo
- PMID 20512760
Related Links
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- Musculi papillares Musculi pectinati musculi pectinati atrii musculi perinei musculi pharyngis musculi rectourethrales musculi regionis analis musculi regionis urogenitalis musculi rotatores musculi rotatores cervicis/colli ...
Related Pictures
★リンクテーブル★
[★]
- 英
- papillary muscle (Z), papillary muscles, PM
- ラ
- musculus papillaris, musculi papillares
- 関
- 心筋梗塞
血流支配
- 前外側乳頭筋：左前下行枝(LAD)、回旋枝(LCA) ← LAD病変だけでは断裂しにくい。
- 後内側乳頭筋：右冠動脈後下行枝(4PD。RADって書く?)
Henry Gray (1825-1861). Anatomy of the Human Body. 1918.