940:
274:
262:
250:
303:
29:
185:
The capitulum does not extend to the posterior side of the humerus and, consequently, during full elbow extension only the anterior half of the head articulates with the capitulum. In full flexion the head similarly reaches beyond the capitulum to enter the shallow
960:
234:. This causes a small but significant lateral displacement of the radius' main axis — equal to half the difference between the two axes of the head (2 mm (0.079 in)) — just enough space to accommodate the
157:
The head of the radius is shaped to articulate with a complex of articular surfaces during both flexion-extension at the elbow and supination-pronation in the forearm:
219:, its major axis (28 mm (1.1 in)) is directed antero-posteriorly and the shorter axis (24 mm (0.94 in)) lateralo-medially. Even though the
98:
175:. The radius can thus glide on the capitulum during elbow flexion-extension while simultaneously rotate about its own main axis during supination-pronation.
182:
is the capitulotrochlear groove. A semi-lunar surface around the circumference of head is shaped to articulate continuously with this groove.
408:
74:
223:
holds the head firmly in place, the ligament is still flexible enough to allow some stretching while the head rotates within it.
646:
401:
650:
273:
261:
249:
678:
548:
451:
93:
758:
585:
552:
394:
660:
930:
664:
627:
581:
572:
220:
312:
722:
544:
205:
199:
146:
129:
has a cylindrical form, and on its upper surface is a shallow cup or fovea for articulation with the
171:
The head's proximal surface is concave and cup-shaped to correspond to the spherical surface of the
632:
172:
130:
105:
41:
of the left forearm, posterior surface. The top is proximal (elbow) and bottom is distal (wrist).
179:
965:
908:
880:
870:
845:
750:
726:
137:. The circumference of the head is smooth; it is broad medially where it articulates with the
81:
69:
885:
875:
865:
773:
519:
515:
730:
500:
486:
482:
290:
204:
The head is cylindrical to allow axial rotation of the radius, thus to articulate with the
8:
637:
496:
216:
166:
939:
903:
621:
715:
478:
456:
334:
317:
235:
961:
Knowledge articles incorporating text from the 20th edition of Gray's
Anatomy (1918)
215:
However, the head of the radius is not perfectly cylindrical but slightly oval. In
913:
857:
825:
605:
595:
535:
525:
815:
766:
682:
611:
599:
441:
429:
226:
During pronation the radius is rotated so that the head's major axis reaches the
944:
830:
446:
954:
835:
820:
805:
702:
616:
506:
308:
125:
86:
34:
895:
797:
762:
674:
227:
209:
187:
138:
840:
810:
111:
754:
530:
433:
386:
693:
563:
466:
134:
379:(5th ed.). New York: Churchill Livingstone. p. 112.
145:, narrow in the rest of its extent, which is embraced by the
57:
359:(5th ed.). New York: Churchill Livingstone. p. 82.
788:
741:
417:
231:
142:
38:
28:
421:
928:
377:
The
Physiology of the Joints: Volume One Upper Limb
370:
368:
366:
357:
The
Physiology of the Joints: Volume One Upper Limb
350:
348:
346:
344:
952:
363:
341:
402:
279:Elbow joint. Deep dissection. Posterior view.
267:Elbow joint. Deep dissection. Posterior view.
255:Elbow joint. Deep dissection. Posterior view.
193:
409:
395:
27:
374:
354:
953:
307:This article incorporates text in the
390:
190:on the anterior side of the humerus.
160:
152:
416:
241:
375:Kapandji, Ibrahim Adalbert (1982).
355:Kapandji, Ibrahim Adalbert (1982).
327:
13:
14:
977:
938:
301:
272:
260:
248:
178:Between the capitulum and the
1:
296:
238:as it being moved medially.
7:
315:of the 20th edition of
284:
10:
982:
197:
164:
894:
856:
796:
787:
740:
701:
692:
562:
465:
428:
200:Proximal radioulnar joint
194:Proximal radioulnar joint
104:
92:
80:
68:
56:
51:
46:
26:
21:
173:capitulum of the humerus
106:Anatomical terms of bone
180:trochlea of the humerus
657:supracondylar ridges
338:(1918), see infobox
217:anatomical position
167:Humeroradial joints
622:deltoid tuberosity
161:Humeroradial joint
153:Articular surfaces
926:
925:
922:
921:
783:
782:
731:Lister's tubercle
457:subclavian groove
452:costal tuberosity
291:Nursemaid's elbow
242:Additional images
236:radial tuberosity
120:
119:
115:
973:
943:
942:
934:
858:Metacarpal bones
794:
793:
759:coronoid process
699:
698:
606:bicipital groove
536:coracoid process
526:spine of scapula
411:
404:
397:
388:
387:
381:
380:
372:
361:
360:
352:
339:
331:
305:
304:
276:
264:
252:
221:annular ligament
206:annular ligament
147:annular ligament
112:edit on Wikidata
109:
31:
19:
18:
981:
980:
976:
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970:
951:
950:
949:
937:
929:
927:
918:
890:
852:
779:
774:styloid process
767:trochlear notch
736:
727:styloid process
688:
628:lower extremity
573:upper extremity
558:
461:
442:conoid tubercle
430:Shoulder girdle
424:
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280:
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196:
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42:
17:
16:Bone of the arm
12:
11:
5:
979:
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619:
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589:
568:
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538:
533:
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523:
509:
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501:great scapular
490:
487:infraspinatous
483:supraspinatous
471:
469:
463:
462:
460:
459:
454:
449:
447:trapezoid line
444:
438:
436:
426:
425:
414:
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340:
335:Gray's Anatomy
325:
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318:Gray's Anatomy
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286:
283:
282:
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198:Main article:
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165:Main article:
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66:
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60:
54:
53:
49:
48:
44:
43:
32:
24:
23:
22:Head of radius
15:
9:
6:
4:
3:
2:
978:
967:
966:Radius (bone)
964:
962:
959:
958:
956:
946:
941:
936:
935:
932:
915:
912:
910:
907:
905:
902:
901:
899:
897:
893:
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882:
879:
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872:
869:
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864:
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839:
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832:
829:
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655:
652:
648:
644:
641:
639:
636:
634:
631:
629:
625:
623:
620:
618:
617:radial sulcus
615:
613:
609:
607:
604:
601:
597:
593:
590:
587:
583:
579:
576:
574:
570:
569:
567:
565:
561:
554:
550:
546:
542:
539:
537:
534:
532:
529:
527:
524:
521:
517:
513:
510:
508:
507:glenoid fossa
505:
502:
498:
497:suprascapular
494:
491:
488:
484:
480:
476:
473:
472:
470:
468:
464:
458:
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453:
450:
448:
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423:
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389:
378:
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309:public domain
292:
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270:
263:
258:
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246:
245:
239:
237:
233:
229:
224:
222:
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212:on the ulna.
211:
207:
201:
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189:
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174:
168:
158:
150:
148:
144:
140:
136:
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71:
67:
64:
61:
59:
55:
50:
45:
40:
36:
30:
25:
20:
909:intermediate
798:Carpal bones
772:near wrist (
763:radial notch
749:near elbow (
721:near wrist (
711:
710:near elbow (
670:
656:
642:
626:
610:
591:
577:
571:
540:
520:supraglenoid
516:infraglenoid
511:
492:
474:
376:
356:
333:
329:
320:
306:
300:
228:radial notch
225:
214:
210:radial notch
203:
188:radial fossa
184:
177:
170:
156:
139:radial notch
124:head of the
123:
121:
75:A02.4.05.002
62:
723:ulnar notch
643:epicondyles
479:subscapular
63:caput radii
52:Identifiers
955:Categories
816:triquetral
751:tuberosity
716:tuberosity
582:anatomical
297:References
896:Phalanges
831:trapezoid
826:trapezium
755:olecranon
683:olecranon
633:capitulum
592:tubercles
512:tubercles
131:capitulum
904:proximal
836:capitate
821:pisiform
806:scaphoid
679:coronoid
638:trochlea
586:surgical
549:inferior
545:superior
531:acromion
434:clavicle
285:See also
208:and the
945:Anatomy
846:hamulus
694:Forearm
661:lateral
647:lateral
596:greater
564:Humerus
553:lateral
493:notches
467:Scapula
420:of the
230:on the
141:of the
135:humerus
133:of the
47:Details
931:Portal
914:distal
841:hamate
811:lunate
703:Radius
675:radial
671:fossae
665:medial
651:medial
600:lesser
541:angles
475:fossae
321:(1918)
313:page 1
126:radius
35:radius
578:necks
418:Bones
311:from
110:[
99:33773
58:Latin
789:Hand
742:Ulna
712:head
612:body
232:ulna
143:ulna
122:The
87:1211
70:TA98
39:ulna
37:and
33:The
886:5th
881:4th
876:3rd
871:2nd
866:1st
422:arm
94:FMA
82:TA2
957::
765:,
761:,
757:,
753:,
729:,
725:,
714:,
681:,
677:,
663:,
649:,
598:,
584:,
551:,
547:,
518:,
499:,
485:,
481:,
432:,
365:^
343:^
149:.
933::
776:)
769:)
733:)
718:)
685:)
673:(
667:)
659:(
653:)
645:(
630::
614::
602:)
594:(
588:)
580:(
575::
555:)
543:(
522:)
514:(
503:)
495:(
489:)
477:(
410:e
403:t
396:v
114:]
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
