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359:. In late reptilians and early mammals, this muscle structure was displaced dorsally; while most of its components evolved into the pectoralis major, some fibers eventually attached to the scapula and evolved into the supraspinatus, the infraspinatus, and parts of the subscapularis.
1496:
700:
Saladin, Kenneth. Anatomy and
Physiology: the Unity of Form and Function. 7th ed., McGraw Hill Education, 2014. pp. 343, 346, 491, 543. Funk, Lennard. Rotator Cuff Biomechanics. Shoulderdoc.co.uk. TheFresh Healthcare Marketing, 11 Feb 2016. Web.
286:. The trapezoidal insertion of the infraspinatus onto the humerus is much larger than the equivalent insertion of the supraspinatus, the reason why the infraspinatus is involved in rotator cuff tears about as frequently as the supraspinatus.
563:
Mochizuki, T.; Sugaya, H.; Uomizu, M.; Maeda, K.; Matsuki, K.; Sekiya, I.; Muneta, T.; Akita, K. (2008). "Humeral
Insertion of the Supraspinatus and Infraspinatus. New Anatomical Findings Regarding the Footprint of the Rotator Cuff".
330:
The infraspinatus is the main external rotator of the shoulder. When the arm is fixed, it adducts the inferior angle of the scapula. Its synergists are teres minor and the deltoid. The infraspinatus and teres minor rotate the
277:
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
420:
743:
262:
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
335:
outward (external, or lateral, rotation); they also assist in carrying the arm backward. Additionally, the infraspinatus reinforces the capsule of the shoulder joint.
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innervates the supraspinatus and infraspinatus muscles. These muscles function to abduct and laterally rotate the arm, respectively.
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235:, the main function of the infraspinatus is to externally rotate the humerus and stabilize the shoulder joint.
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351: – are thought to have evolved from a primitive muscle sheet that connected the
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Knowledge articles incorporating text from the 20th edition of Gray's
Anatomy (1918)
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Galleries containing indiscriminate images of the article subject are discouraged
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The tendon of this muscle is sometimes separated from the capsule of the
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From an evolutionary prospective, the pectoral muscles – the
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This gallery of anatomic features needs cleanup to abide by the
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The infraspinatus is frequently fused with the teres minor.
713:
at Human
Anatomy Online, SUNY Downstate Medical Center
604:
Color Atlas of Human
Anatomy, Vol. 1: Locomotor System
1464:
655:"Origin and Comparative Anatomy of the Pectoral Limb"
60:
Infraspinatus muscle (shown in red) seen from behind.
389:; please improve or remove the gallery accordingly.
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430:, infraspinatus is labelled 8 (posterior view).
414:Infraspinatus muscle (shown in red). Animation.
302:, which may communicate with the joint cavity.
597:
595:
44:Muscles connecting the upper extremity to the
737:
8:
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266:which covers it, and separates it from the
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659:Clinical Orthopaedics and Related Research
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251:and laterally to the middle facet of the
1471:
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227:, which occupies the chief part of the
513:This article incorporates text in the
206:
29:
566:The Journal of Bone and Joint Surgery
231:. As one of the four muscles of the
27:Main external rotator of the shoulder
7:
634:. Wheeless' Textbook of Orthopaedics
25:
1474:
507:
487:
475:
459:
447:
435:
419:
407:
371:
1132:extensor carpi radialis longus
1059:flexor digitorum superficialis
1:
482:Left humerus. Posterior view.
426:Muscles on the dorsum of the
243:It attaches medially to the
141:of arm and stabilization of
1342:flexor digiti minimi brevis
521:of the 20th edition of
1528:
1084:flexor digitorum profundus
203:Anatomical terms of muscle
1512:Shoulder lateral rotators
1502:Muscles of the upper limb
772:
671:10.1007/s11999-007-0102-6
201:
53:
37:
1309:abductor pollicis brevis
1193:extensor pollicis longus
1188:extensor pollicis brevis
1183:abductor pollicis longus
711:Anatomy figure: 03:03-04
602:Platzer, Werner (2004).
382:medical manual of style
1347:abductor digiti minimi
1337:opponens digiti minimi
1304:flexor pollicis brevis
1153:extensor carpi ulnaris
1148:extensor digiti minimi
1089:flexor pollicis longus
223:is a thick triangular
219:In human anatomy, the
160:musculus infraspinatus
1222:bicipital aponeurosis
1049:flexor carpi radialis
653:Brand, R. A. (2008).
264:infraspinatous fascia
1416:extensor retinaculum
1054:flexor carpi ulnaris
578:10.2106/JBJS.G.00427
494:Infraspinatus muscle
470:. Posterior surface.
454:Infraspinatus muscle
442:Infraspinatus muscle
229:infraspinatous fossa
221:infraspinatus muscle
33:Infraspinatus muscle
1244:antebrachial fascia
1178:anatomical snuffbox
989:triangular interval
946:intermuscular septa
838:infraspinous fascia
833:supraspinous fascia
333:head of the humerus
312:suprascapular nerve
127:Suprascapular nerve
114:circumflex scapular
1446:palmar aponeurosis
1441:flexor retinaculum
1421:extensor expansion
1265:osborne's ligament
1143:extensor digitorum
1079:pronator quadratus
979:quadrangular space
913:articularis cubiti
245:infraspinous fossa
143:glenohumeral joint
77:Infraspinous fossa
1462:
1461:
1458:
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1454:
1453:
1316:adductor pollicis
1299:opponens pollicis
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1208:
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998:
846:
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363:Additional images
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139:External rotation
48:(posterior view).
16:(Redirected from
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1200:extensor indicis
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984:triangular space
875:coracobrachialis
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606:(5th ed.).
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349:pectoralis minor
345:pectoralis major
280:greater tubercle
253:greater tubercle
209:edit on Wikidata
94:greater tubercle
92:Middle facet of
58:
46:vertebral column
42:
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1354:palmaris brevis
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1127:brachioradialis
1111:
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1044:palmaris longus
1028:
1007:
995:
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941:brachial fascia
936:axillary fascia
931:axillary sheath
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903:triceps brachii
889:
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707:
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652:
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632:"Infraspinatus"
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610:. p. 138.
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828:deltoid fascia
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550:Gray's Anatomy
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1287:lateral volar
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802:subscapularis
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792:infraspinatus
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787:supraspinatus
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665:(3): 531–42.
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617:3-13-533305-1
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515:public domain
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18:Infraspinatus
1507:Rotator cuff
1431:
1406:
1374:
1363:intermediate
1325:medial volar
1226:
1163:
1113:superficial:
1112:
1069:
1030:superficial:
1029:
1010:compartments
973:
945:
857:compartments
791:
782:rotator cuff
699:
662:
658:
648:
636:. Retrieved
626:
603:
572:(5): 962–9.
569:
565:
558:
548:
526:
512:
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391:
342:
329:
321:
309:
293:
276:
261:
242:
233:rotator cuff
220:
218:
172:A04.6.02.008
159:
809:teres major
797:teres minor
306:Innervation
272:teres minor
268:teres major
149:Identifiers
1491:Categories
1407:posterior:
1375:interossei
1332:hypothenar
1122:mobile wad
885:brachialis
638:14 January
503:References
392:(May 2015)
339:In animals
1432:anterior:
1370:lumbrical
1173:supinator
1103:posterior
895:posterior
318:Variation
290:Relations
239:Structure
88:Insertion
1232:extensor
1020:anterior
908:anconeus
867:anterior
765:Shoulder
689:18264841
586:18451386
519:page 441
353:coracoid
326:Function
116:arteries
1481:Anatomy
1005:Forearm
951:lateral
777:deltoid
755:of the
753:Muscles
693:, p 541
680:2505211
468:scapula
428:scapula
357:humerus
355:to the
284:humerus
282:of the
257:humerus
255:of the
249:scapula
247:of the
134:Actions
98:humerus
96:of the
81:scapula
79:of the
66:Details
1467:Portal
1397:fascia
1385:palmar
1380:dorsal
1294:thenar
1237:flexor
1214:fascia
1136:brevis
974:spaces
956:medial
923:fascia
880:biceps
819:fascia
687:
677:
614:
608:Thieme
584:
527:(1918)
225:muscle
105:Artery
72:Origin
1253:other
1164:deep:
1070:deep:
967:other
517:from
466:Left
300:bursa
298:by a
207:[
196:32546
155:Latin
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