WordNet

of your secondary field of academic concentration or specialization
limited in size or scope; "a small business"; "a newspaper with a modest circulation"; "small-scale plans"; "a pocket-size country" (同)modest, small, small-scale, pocket-size, pocket-sized
not of legal age; "minor children" (同)nonaged, underage
warranting only temporal punishment; "venial sin" (同)venial
inferior in number or size or amount; "a minor share of the profits"; "Ursa Minor"
lesser in scope or effect; "had minor differences"; "a minor disturbance"
of a scale or mode; "the minor keys"; "in B flat minor"
of lesser importance or stature or rank; "a minor poet"; "had a minor part in the play"; "a minor official"; "many of these hardy adventurers were minor noblemen"; "minor back roads"
of lesser seriousness or danger; "suffered only minor injuries"; "some minor flooding"; "a minor tropical disturbance"
of the younger of two boys with the same family name; "Jones minor"
make ones way by force; "He muscled his way into the office"
animal tissue consisting predominantly of contractile cells (同)muscular_tissue
one of the contractile organs of the body (同)musculus
authority or power or force (especially when used in a coercive way); "the senators used their muscle to get the party leader to resign"
of or relating to the chest or thorax; "pectoral organ" (同)thoracic
an adornment worn on the chest or breast (同)pectoral medallion
either of two large muscles of the chest (同)pectoral_muscle, pectoralis, musculus pectoralis, pecs

PrepTutorEJDIC

『小さいほうの,少ない』 / (階級・地位・重要性などが)『劣ったほうの』,重要でない / 重大ではない / 未成年の / (音楽で)短調の / 未成年者 / (大学の科目・課程の)副専攻科目 / (音楽で)短調 / 《the minors》《米》=minor league
〈U〉(動物体の組織としての)『筋肉』,筋(きん);〈C〉(体の各部を動かす)筋肉 / 〈U〉力,(特に)筋力,腕力 / 《俗に》(…に)強引に割り込む《+『in on』(『into, through』)+『名』》
胸の,胸部の / 胸部
筋肉の,筋力のある / 力ずくの

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/01/16 13:48:14」(JST)

wiki en

The pectoralis minor (/ˌpɛktəˈreɪlɨs ˈmaɪnər/) is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major in the human body.

Structure

It arises from the upper margins and outer surfaces of the third, fourth, and fifth ribs, near their cartilages and from the aponeuroses covering the intercostalis.

The fibers pass superior and lateral and converge to form a flat tendon, which is inserted into the medial border and upper surface of the coracoid process of the scapula.

Relations

The pectoralis minor muscle is covered anteriorly (superficially) by the clavipectoral fascia. The Medial pectoral nerve pierces the pectoralis minor and the clavipectoral fascia. In attaching to the coracoid process, the pectoralis minor forms a 'bridge' - structures passing into the upper limb from the thorax will pass directly underneath.^[1]

Axillary nodes are classified according to their positions relative to the pectoralis minor muscle. Level 1 are lateral, Level 2 are deep, Level 3 are medial. The pectoralis minor divides the axillary artery into three parts (in contrary sequence compared to the nodes) - first part medial, second part deep/posterior, third part lateral in relation to the pectoralis minor.

Variations

An individual with an axillary arch as well as sternalis muscle and an accessory abdominal portion of the pectoralis major.

The origin is from the second, third and fourth or fifth ribs. The tendon of insertion may extend over the coracoid process to the greater tubercle. It may be split into several parts. Absence of this muscle is rare but happens with certain uncommon diseases.^{[citation needed]}

Function

The pectoralis minor depresses the point of the shoulder, drawing the scapula inferior, towards the thorax, and throwing its inferior angle posteriorly.

Additional images

Position of pectoralis minor muscle (shown in red).
Right pectoralis minor muscle. Deep dissection.

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

^ http://www.teachmeanatomy.com/muscles-of-the-pectoral-region/

External links

Illustration: upper-body/pectoralis-minor from The Department of Radiology at the University of Washington
13631566 at GPnotebook
Anatomy figure: 04:04-05 at Human Anatomy Online, SUNY Downstate Medical Center
Anatomy figure: 05:02-08 at Human Anatomy Online, SUNY Downstate Medical Center
Anatomy photo:05:ov-0200 at the SUNY Downstate Medical Center
Anatomy photo:05:01-0102 at the SUNY Downstate Medical Center
Slide
Muscles/PectoralisMinor at exrx.net

UpToDate Contents

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1. 筋力低下の評価における筋力検査 muscle examination in the evaluation of weakness
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5. 筋萎縮性側索硬化症の症状に基づくマネージメント symptom based management of amyotrophic lateral sclerosis

English Journal

Unilateral ectopic insertion of the pectoralis minor: Clinical and functional significance.

Goldman E1, Vasan C1, Lopez-Cardona H1, Vasan N2.
Morphologie : bulletin de l'Association des anatomistes.Morphologie.2015 Oct 29. pii: S1286-0115(15)00229-5. doi: 10.1016/j.morpho.2015.09.049. [Epub ahead of print]
During routine dissection of a 70-year-old female, we observed a unilateral ectopic insertion of the left pectoralis minor muscle. The tendon was cord-like and passed through a tendon sheath superior to the coracoid process to insert on the greater tubercle of the humerus. Additionally, an aponeuros
PMID 26525457

Muscle Energy Technique and Forward Shoulder Posture in Collegiate Swimmers.

Laudner KG1, Wenig M2, Selkow NM1, Williams J1, Post E3.
Journal of athletic training.J Athl Train.2015 Oct 28. [Epub ahead of print]
CONTEXT: Empirical data for treating forward shoulder posture supports stretching the anterior shoulder musculature. Although muscle energy techniques (METs) have been hypothesized to lengthen muscle, no data have described the usefulness of this technique among swimmers.OBJECTIVE: To determ
PMID 26509682

The pectoralis minor muscle and shoulder movement-related impairments and pain: Rationale, assessment and management.

Morais N1, Cruz J2.
Physical therapy in sport : official journal of the Association of Chartered Physiotherapists in Sports Medicine.Phys Ther Sport.2015 Oct 22. pii: S1466-853X(15)00089-9. doi: 10.1016/j.ptsp.2015.10.003. [Epub ahead of print]
The adaptive shortening or tightness of the pectoralis minor muscle (PMm) is one of the potential biomechanical mechanisms associated with altered scapular alignment at rest and scapular motion during arm elevation (scapular dyskinesis) in patients with shoulder complaints. This masterclass briefly
PMID 26530726

Japanese Journal

Pectoralis Major and Pectoralis Minor Muscle Flap for Postpneumonectomy Empyema

SHIPKOV CHRISTO DIMITROV,UCHIKOV ANGEL PETROV
Surgery today : the Japanese journal of surgery 40(3), 285, 2010-03-01
NAID 10027394759

化学放射線療法後の喉頭全摘出術における pharyngeal interposition graft を用いた創合併症の予防

古田康,松村道哉,大谷文雄,鈴木正宣,佐藤宏紀,森田真也,本間明宏,折舘伸彦,福田諭
日本耳鼻咽喉科學會會報 113(1), 9-14, 2010-01-20
目的: 化学放射線療法後の喉頭癌再発例に対する喉頭全摘出術においては, 咽頭皮膚瘻孔など創合併症の発生率が高いことが報告されている. その予防策として, 咽頭粘膜縫合部を血流に富む新鮮な組織で覆う方法 (pharyngeal interposition graft) の有用性が報告されている. 今回, 喉頭癌に対する化学放射線療法後の再発例において, 喉頭全摘出術とともに大胸筋弁をpharynge …
NAID 10026611843

「小胸筋」

Pectoralis minor
	Pectoralis minor (shown in red).
	Pectoralis minor muscle (shown in red). The bone shown in blue is shoulder blade.
Details
Latin	Musculus pectoralis minor
Origin	Third to fifth ribs, near their costal cartilages
Insertion	Medial border and superior surface of the coracoid process of the scapula
Artery	Pectoral branch of the thoracoacromial trunk
Nerve	Medial pectoral nerve (C8, T1)
Actions	Stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall, raises ribs in inspiration
Identifiers
Dorlands; /Elsevier	m_22/12550138
TA	A04.4.01.006
FMA	13109
	Anatomical terms of muscle [edit on Wikidata]