WordNet

rhomboid muscle that draws the scapula toward the vertebral column and slightly upward (同)lesser_rhomboid_muscle, musculus_rhomboideus_minor
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"
shaped like a rhombus or rhomboid; "rhomboidal shapes" (同)rhomboidal
a parallelogram with adjacent sides of unequal lengths; an oblique-angled parallelogram with only the opposite sides equal
any of several muscles of the upper back that help move the shoulder blade (同)rhomboid muscle

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
偏菱(へんりょう)形,長斜方形 / ひし形の,長斜方形の

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/03/11 05:44:21」(JST)

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In human anatomy, the rhomboid minor is a small skeletal muscle on the back that connects the scapula with the vertebrae of the spinal column.

Located inferior to levator scapulae and superior to rhomboid major, it acts together with the latter to keep the scapula pressed against the thoracic wall. It lies deep to trapezius but superficial to the long spinal muscles.^[1]

§Origin and insertion

The rhomboid minor arises from the inferior border of the nuchal ligament, from the spinous processes of the seventh cervical and first thoracic vertebrae, and from the intervening supraspinous ligaments. ^[1]

It is inserted into a small area of the medial border of the scapula at the level of the scapular spine. ^[2]

§Action

Together with the rhomboid major, the rhomboid minor retracts the scapula when trapezius is contracted. Acting as an antagonist to the trapezius, the rhomboid major and minor elevate the medial border of the scapula medially and upward, working in tandem with the levator scapulae muscle to rotate the scapulae downward. While other shoulder muscles are active, the rhomboid major and minor stabilize the scapula. ^[3]

§Innervation and blood supply

The nerve supply comes from the dorsal scapular nerve, with most of its fibers derived from the C5 nerve root and only minor contribution from C4 or C6. ^[4]

The rhomboid minor gets its arterial blood supply from the dorsal scapular artery.

§Variation

It is usually separated from the rhomboid major by a slight interval, but the adjacent margins of the two muscles are occasionally united. ^[5]

§Additional images

Position of rhomboid minor muscle (shown in red).

Left scapula. Dorsal surface.

The scapular and circumflex arteries.

Full back muscle flex.

§References

^ ^a ^b 194641998 at GPnotebook
^ Origin, insertion and nerve supply of the muscle at Loyola University Chicago Stritch School of Medicine
^ "Function (of rhomboid muscles)". GP Notebook. Retrieved January 2011.
^ Martin, R. M.; Fish, D. E. (2007). "Scapular winging: anatomical review, diagnosis, and treatments". Current Reviews in Musculoskeletal Medicine 1 (1): 1–11. doi:10.1007/s12178-007-9000-5. PMC 2684151. PMID 19468892. edit, p. 4
^ Gray's Anatomy (1918), see infobox

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

§External links

Wikimedia Commons has media related to Rhomboid minor muscles.

Anatomy photo:01:st-0211 at the SUNY Downstate Medical Center

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「小菱形筋」

Rhomboid minor
	Muscles connecting the upper extremity to the vertebral column. (Rhomboid minor in red)
Details
Latin	musculus rhomboideus minor
Origin	nuchal ligaments and spinous processes of C7–T1
Insertion	Medial border of scapula, superior to the insertion of rhomboid major muscle
Artery	Deep branch transverse cervical artery
Nerve	dorsal scapular nerve (C4–5)
Actions	Retracts and rotates scapula, fixes scapula to thoracic wall
Antagonist	serratus anterior
Identifiers
Gray's	p.434
Dorlands; /Elsevier	m_22/12550544
TA	A04.3.01.008
FMA	13380
	Anatomical terms of muscle