Spinoglenoid Notch

	Spinoglenoid Notch The great scapular notch (or ''spinoglenoid notch'') is a notch which serves to connect the supraspinous fossa and infraspinous fossa. It lies immediately medial to the attachment of the acromion to the lateral angle of the scapular spine. The Suprascapular artery and suprascapular nerve pass around the great scapular notch anteroposteriorly. Supraspinatus and infraspinatus are both supplied by the suprascapular nerve, which originates from the superior trunk of the brachial plexus (roots C5-C6). Additional images File:Great scapular notch - animation01.gif, Left scapula. Great scapular notch shown in red. File:Great scapular notch - animation04.gif, Animation. Great scapular notch shown in red. See also * Suprascapular notch The suprascapular notch (or ''scapular notch'') is a notch in the superior border of the scapula, just medial to the base of the coracoid process. It forms the entrance site into the suprascapular canal. Structure This notch is converted into ... ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Supraspinous Fossa The supraspinous fossa (supraspinatus fossa, supraspinatous fossa) of the posterior aspect of the scapula (the shoulder blade) is smaller than the infraspinous fossa, concave, smooth, and broader at its vertebral than at its humeral end. Its medial two-thirds give origin to the Supraspinatus. Structure The fossa can be exposed by the removal of skin and the superficial fascia of the back and the trapezius muscle. The supraspinous fossa is bounded by the spine of scapula on the inferior side, acromion process on the lateral side and the superior angle of scapula on the superior side. Supraspinatus muscle originates from the supraspinous fossa. Distal attachment of the levator scapulae muscle is also on the medial aspect of the fossa. Function The suprascapular artery and nerve are found within the fossa. The posterior branch of the suprascapular artery supplies the supraspinatous muscle. Dorsal scapular artery also gives off a collateral branch and anastomoses with the supra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Infraspinous Fossa The infraspinous fossa (infraspinatus fossa or infraspinatous fossa) of the scapula is much larger than the supraspinatous fossa; toward its vertebral margin a shallow concavity is seen at its upper part; its center presents a prominent convexity, while near the axillary border is a deep groove which runs from the upper toward the lower part. The medial two-thirds of the fossa give origin to the Infraspinatus; the lateral third is covered by this muscle. Additional images File:Infraspinatus fossa of left scapula- animation.gif, Left scapula. Infraspinatous fossa shown in red. File:Infraspinatus fossa - animation.gif, Animation. Infraspinatous fossa shown in red. File:Infraspinatous fossa of scapula01.png, Still image. File:Gray203.png, Left scapula. Dorsal surface. ("Infra-spinatous" fossa visible at bottom right.) File:Scapula post.jpg, Left scapula. Dorsal surface. Infraspinatous fossa not labeled, but visible at center. File:Infraspinatus muscle back2.png, Infraspin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Suprascapular Artery The suprascapular artery is a branch of the thyrocervical trunk on the neck. Structure At first, it passes downward and laterally across the scalenus anterior and phrenic nerve, being covered by the sternocleidomastoid muscle; it then crosses the subclavian artery and the brachial plexus, running behind and parallel with the clavicle and subclavius muscle and beneath the inferior belly of the omohyoid to the superior border of the scapula. It passes over the superior transverse scapular ligament in most of the cases while below it through the suprascapular notch in some cases. The artery then enters the supraspinous fossa of the scapula. It travels close to the bone, running through the suprascapular canal underneath the supraspinatus muscle, to which it supplies branches. It then descends behind the neck of the scapula, through the great scapular notch and under cover of the inferior transverse ligament, to reach the infraspinatous fossa, where it supplies infraspinatus a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Suprascapular Nerve The suprascapular nerve is a nerve that branches from the upper trunk of the brachial plexus. It is responsible for the innervation of two of the muscles that originate from the scapula, namely the supraspinatus muscle, supraspinatus and infraspinatus muscles. Structure The suprascapular nerve arises from the upper trunk of the brachial plexus which is formed by the union of the Anterior ramus of spinal nerve, ventral rami of the fifth and sixth cervical nerves. After branching from the upper trunk, the nerve passes across the posterior triangle of the neck parallel to the inferior belly of the omohyoid muscle and deep to the trapezius muscle. It then runs along the Scapula#Borders, superior border of the scapula through the suprascapular canal, in which it enters via the suprascapular notch inferior to the superior transverse scapular ligament and enters the supraspinous fossa. It then passes beneath the supraspinatus, and curves around the lateral border of the spine of the scapul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Supraspinatus The supraspinatus (plural ''supraspinati'') is a relatively small muscle of the upper back that runs from the supraspinous fossa superior portion of the scapula (shoulder blade) to the greater tubercle of the humerus. It is one of the four rotator cuff muscles and also abducts the arm at the shoulder. The spine of the scapula separates the supraspinatus muscle from the infraspinatus muscle, which originates below the spine. Structure The supraspinatus muscle arises from the supraspinous fossa, a shallow depression in the body of the scapula above its spine. The supraspinatus muscle tendon passes laterally beneath the cover of the acromion. Research in 1996 showed that the postero-lateral origin was more lateral than classically described. The supraspinatus tendon is inserted into the superior facet of the greater tubercle of the humerus. The distal attachments of the three rotator cuff muscles that insert into the greater tubercle of the humerus can be abbreviated as SIT when vie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Infraspinatus In human anatomy, the infraspinatus muscle is a thick triangular muscle, which occupies the chief part of the infraspinatous fossa.''Gray's Anatomy'', see infobox. As one of the four muscles of the rotator cuff, the main function of the infraspinatus is to externally rotate the humerus and stabilize the shoulder joint. Structure It attaches medially to the infraspinous fossa of the scapula and laterally to the middle facet of the greater tubercle of the humerus. The muscle arises by fleshy fibers from the medial two-thirds of the infraspinatous fossa, and by tendinous fibers from the ridges on its surface; it also arises from the infraspinatous fascia which covers it, and separates it from the teres major and teres minor. The fibers converge to a tendon, which glides over the lateral border of the spine of the scapula and passing across the posterior part of the capsule of the shoulder-joint, is inserted into the middle impression on the greater tubercle of the humerus. The trape ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Suprascapular Notch The suprascapular notch (or ''scapular notch'') is a notch in the superior border of the scapula, just medial to the base of the coracoid process. It forms the entrance site into the suprascapular canal. Structure This notch is converted into a foramen by the suprascapular ligament, and serves for the passage of the suprascapular nerve; sometimes the ligament is ossified. The suprascapular vessels varies in number as well as in their course as they run at the suprascapular notch site. The suprascapular artery pass above the suprascapular ligament in most cases. The suprascapular vein been found to pass above the suprascapular ligament as well as passing through the suprascapular notch. Types Two main classification systems exists with others being modified approaches of the same principle. Typing based on subjective observation of the suprascapular notch shape. Introduced by and modified by . There are six basic types of scapular notch: * Type I: Notch is absent. The supe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Suprascapular Canal The suprascapular canal is an anatomical passage between two openings found on the upper dorsal aspect of the shoulder. It is found bilaterally running on superio-lateral aspect of the dorsal surface of the scapula underneath the supraspinatus muscle. Structure The suprascapular canal is an osteofibrous canal situated in the spinoglenoid fossa conveying suprascapular nerve and vessels. Its passage covered by the supraspinatus fascia and connects between its entrance formed by the suprascapular notch (enclosed by the suprascapular ligament) and its exit formed by spinoglenoid notch (enclosed by the spinoglenoid ligament). Clinical significance As the suprascapular nerve travels through the suprascapular canal narrow sites, it can potentially get entrapped leading to suprascapular nerve entrapment syndrome. The causes have different anatomical implications at each site. The mechanisms varies and range from anatomical variations to pathological formations as well as from nerve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]