172:, the precursor extensor mass differentiates into three layers: radial, superficial, and deep. The extensor digitorum brevis manus may have been originated from the deep layer, a typical location where most of the variations take place. Some authors believe that this muscle may represent a failure of proximal migration of ulnocarpal elements of the extensor muscle mass in humans.
134:
in the area of the fourth extensor compartment. Many variations of the muscle have been described in the literature. It could have up to four tendons with a single tendon inserting to the index or the middle finger being the two most common variations. At the insertion the tendon of the extensor
159:
The extensor digitorum brevis manus was found to be present in 4% of the population, and there was no correlation between gender, side or ancestry. it inserted to the index finger and the middle finger in 77% and 23% of the cases, respectively. It occurred bilaterally in 26% the total cases.
188:
Only a few clinical cases have been reported among more than 300 clinical and cadaveric dissections. This implies that the presence of this muscle is usually asymptomatic, although the extensor digitorum brevis manus might cause a painful
129:
The extensor digitorum brevis manus usually originates from the dorsal aspect (backside) of the wrist, either from the joint capsule, the distal end (the most distant end) of the radius, the metacarpal, or from the
706:
Bharambe, Vaishaly; Shevade, Sapna; Patel, Dinesh; Manvikar, Purushottam Rao; Bajpayee, Pallavi Gupta (December 2017). "A study of the extensor tendons of the hand from point of view of evolution".
375:Çavdar, Safiye; Doğan, Teoman; Bayramiçli, Mehmet; Şehirli, Ümit; Yüksel, Mehtap (January 1998). "An unusual variation of extensor digitorum brevis manus: A case report and literature review".
117:, and is relatively rare. It has a prevalence of 4% in the general population according to a meta-analysis. This muscle is commonly misdiagnosed as a ganglion cyst, synovial nodule or
783:
518:
Suwannakhan, Athikhun; Tawonsawatruk, Tulyapruek; Meemon, Krai (November 2016). "Extensor tendons and variations of the medial four digits of hand: a cadaveric study".
180:
It extends the index or the middle finger. It is believed to be a substitute for the extension of the index finger when the extensor indicis proprius is absent.
451:
Paraskevas, G.; Papaziogas, B.; Spanidou, S.; Papadopoulos, A. (January 2002). "Unusual variation of the extensor digitorum brevis manus: A case report".
329:
Yammine, Kaissar (January 2015). "The prevalence of extensor digitorum brevis manus and its variants in humans: a systematic review and meta-analysis".
1381:
220:
776:
275:
Ranade, Anu V.; Rai, Rajalakshmi; Prabhu, Latha V.; Rajanigandha, V.; Janardhanan, Jiji P.; Ramanathan, Lakshmi; Prameela, M. D. (December 2008).
1386:
1175:
1171:
1098:
1142:
1059:
990:
1524:
995:
769:
1123:
413:
Ogura, Takashi; Inoue, Hajime; Tanabe, Gozo (January 1987). "Anatomic and clinical studies of the extensor digitorum brevis manus".
1455:
934:
502:
Treatise on the variations of the muscular system of man and their significance from the point of view of zoological anthropology
1348:
1232:
1227:
1222:
1049:
906:
1529:
1480:
497:
Traité des variations du système musculaire de l'homme et de leur signification au point de vue de l'anthropologie zoologique
215:
140:
633:"A morphometric evaluation of Extensor digitorum brevis manus by dissection: A rare atavistic muscle of the dorsum of hand"
1419:
1376:
1343:
1192:
1187:
1128:
225:
1088:
148:
144:
61:
49:
661:
AlMarshad, Felwa A; Mahabbat, Nehal; Alkhalifah, Ahmed; Alhumaidan, Mohammed I; Jarman, Abdulaziz (28 September 2022).
1093:
896:
131:
631:
Dixit, Daksha; Kubavant, Dharati M.; Lakhani, Chintan J.; Patel, Mital M.; Rathod, Suresh P.; Singel, T.C. (2012).
1519:
1424:
1182:
1118:
952:
139:, although it also occurs when the extensor indicis proprius is absent. It was also reported to coexist with the
136:
1355:
1338:
1239:
914:
210:
1409:
1393:
1271:
1083:
942:
85:
1261:
1078:
570:
169:
113:. It was first described by Albinus in 1758. The muscles lies in the fourth extensor compartment of the
1304:
1276:
841:
831:
826:
1371:
1283:
1217:
1028:
877:
872:
143:, another anatomical variation in the extensor compartment of the hand. The muscle is supplied the
1485:
1460:
1018:
848:
836:
750:
613:
543:
476:
354:
190:
924:
694:
605:
535:
468:
430:
392:
346:
306:
246:
1212:
1023:
740:
715:
684:
674:
597:
527:
460:
422:
384:
338:
296:
288:
106:
632:
1333:
1166:
980:
975:
970:
947:
37:
1299:
867:
816:
689:
662:
301:
276:
426:
388:
1514:
1508:
754:
480:
617:
821:
547:
495:
358:
32:
446:
444:
574:
561:
Straus, William (February 1941). "The
Phylogeny of the Human Forearm Extensors".
719:
1161:
531:
464:
342:
292:
194:
698:
601:
539:
472:
350:
310:
609:
434:
396:
804:
679:
91:
1044:
513:
511:
745:
728:
588:
Souter, W A (8 December 2005). "The extensor digitorum brevis manus".
1436:
1253:
962:
919:
858:
792:
761:
198:
44:
370:
368:
729:"Variant muscle on dorsal aspect of hand with review of literature"
114:
73:
56:
1318:
118:
110:
765:
891:
796:
270:
268:
266:
264:
249:[On the extensor of the fingers of the short hand].
453:
European
Journal of Orthopaedic Surgery & Traumatology
408:
406:
277:"Incidence of Extensor Digitorum Brevis Manus Muscle"
1469:
1444:
1435:
1402:
1364:
1326:
1317:
1292:
1252:
1201:
1150:
1141:
1107:
1067:
1058:
1043:
1006:
961:
933:
905:
890:
857:
803:
72:
67:
55:
43:
31:
26:
21:
193:which can potentially be misdiagnosed as other
777:
324:
322:
320:
8:
1441:
1323:
1147:
1064:
1055:
902:
809:
784:
770:
762:
708:Journal of the Anatomical Society of India
744:
733:Medpulse International Journal of Anatomy
688:
678:
300:
221:Extensor indicis et medii communis muscle
245:Albinus, Bernhardus-Siegefridus (1758).
79:Musculus extensor digitorum brevis manus
237:
135:digitorum brevis manus often joins the
663:"A Rare Case of Painful Hand Swelling"
89:
18:
504:] (in French). Schleicher frères.
247:"De extensore digitorum brevis manus"
7:
14:
494:Le Double, Anatole-Félix (1897).
211:Extensor indicis proprius muscle
109:on the backside (dorsum) of the
520:Surgical and Radiologic Anatomy
331:Surgical and Radiologic Anatomy
103:Extensor digitorum brevis manus
22:Extensor digitorum brevis manus
1172:extensor carpi radialis longus
1099:flexor digitorum superficialis
216:Extensor medii proprius muscle
16:Muscle on the back of the hand
1:
727:Rao Poleneni, Sushma (2021).
427:10.1016/s0363-5023(87)80171-5
389:10.1016/S0363-5023(98)80108-1
226:List of anatomical variations
149:anterior interosseous artery
147:and posterior branch of the
145:posterior interosseous nerve
62:Posterior interosseous nerve
50:Anterior interosseous artery
1382:flexor digiti minimi brevis
415:The Journal of Hand Surgery
377:The Journal of Hand Surgery
1546:
1124:flexor digitorum profundus
720:10.1016/j.jasi.2017.12.001
590:British Journal of Surgery
197:such as synovial cyst and
1525:Muscles of the upper limb
812:
532:10.1007/s00276-016-1673-2
465:10.1007/s00590-002-0035-4
343:10.1007/s00276-014-1312-8
293:10.1007/s11552-008-9111-5
251:Academicarum Annotationum
168:At some point during the
137:extensor indicis proprius
84:
1349:abductor pollicis brevis
1233:extensor pollicis longus
1228:extensor pollicis brevis
1223:abductor pollicis longus
141:extensor medii proprius
1387:abductor digiti minimi
1377:opponens digiti minimi
1344:flexor pollicis brevis
1193:extensor carpi ulnaris
1188:extensor digiti minimi
1129:flexor pollicis longus
602:10.1002/bjs.1800530923
86:Anatomical terminology
1530:Anatomical variations
1262:bicipital aponeurosis
1089:flexor carpi radialis
184:Clinical significance
170:embryonic development
1456:extensor retinaculum
1094:flexor carpi ulnaris
680:10.7759/cureus.29691
132:radiocarpal ligament
1284:antebrachial fascia
1218:anatomical snuffbox
1029:triangular interval
986:intermuscular septa
878:infraspinous fascia
873:supraspinous fascia
1486:palmar aponeurosis
1481:flexor retinaculum
1461:extensor expansion
1305:osborne's ligament
1183:extensor digitorum
1119:pronator quadratus
1019:quadrangular space
953:articularis cubiti
1502:
1501:
1498:
1497:
1494:
1493:
1356:adductor pollicis
1339:opponens pollicis
1313:
1312:
1248:
1247:
1137:
1136:
1039:
1038:
886:
885:
746:10.26611/10011924
640:Medica Innovatica
100:
99:
95:
1537:
1520:Accessory muscle
1474:
1449:
1442:
1324:
1240:extensor indicis
1206:
1155:
1148:
1112:
1072:
1065:
1056:
1024:triangular space
915:coracobrachialis
903:
810:
786:
779:
772:
763:
758:
748:
723:
702:
692:
682:
648:
647:
637:
628:
622:
621:
585:
579:
578:
558:
552:
551:
526:(9): 1083–1093.
515:
506:
505:
491:
485:
484:
448:
439:
438:
410:
401:
400:
372:
363:
362:
326:
315:
314:
304:
272:
259:
258:
242:
107:accessory muscle
92:edit on Wikidata
19:
1545:
1544:
1540:
1539:
1538:
1536:
1535:
1534:
1505:
1504:
1503:
1490:
1470:
1465:
1445:
1431:
1398:
1394:palmaris brevis
1360:
1309:
1288:
1244:
1202:
1197:
1167:brachioradialis
1151:
1133:
1108:
1103:
1084:palmaris longus
1068:
1047:
1035:
1002:
981:brachial fascia
976:axillary fascia
971:axillary sheath
957:
943:triceps brachii
929:
894:
882:
853:
799:
790:
726:
705:
660:
657:
655:Further reading
652:
651:
635:
630:
629:
625:
587:
586:
582:
560:
559:
555:
517:
516:
509:
493:
492:
488:
450:
449:
442:
412:
411:
404:
374:
373:
366:
328:
327:
318:
274:
273:
262:
244:
243:
239:
234:
207:
186:
178:
166:
157:
127:
105:is an extra or
96:
38:Muscular system
17:
12:
11:
5:
1543:
1541:
1533:
1532:
1527:
1522:
1517:
1507:
1506:
1500:
1499:
1496:
1495:
1492:
1491:
1489:
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1483:
1477:
1475:
1467:
1466:
1464:
1463:
1458:
1452:
1450:
1439:
1433:
1432:
1430:
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1428:
1427:
1422:
1412:
1406:
1404:
1400:
1399:
1397:
1396:
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1390:
1389:
1384:
1379:
1368:
1366:
1362:
1361:
1359:
1358:
1353:
1352:
1351:
1346:
1341:
1330:
1328:
1321:
1315:
1314:
1311:
1310:
1308:
1307:
1302:
1300:cubital tunnel
1296:
1294:
1290:
1289:
1287:
1286:
1281:
1280:
1279:
1274:
1267:common tendons
1264:
1258:
1256:
1250:
1249:
1246:
1245:
1243:
1242:
1237:
1236:
1235:
1230:
1225:
1215:
1209:
1207:
1199:
1198:
1196:
1195:
1190:
1185:
1180:
1179:
1178:
1169:
1158:
1156:
1145:
1139:
1138:
1135:
1134:
1132:
1131:
1126:
1121:
1115:
1113:
1105:
1104:
1102:
1101:
1096:
1091:
1086:
1081:
1079:pronator teres
1075:
1073:
1062:
1053:
1041:
1040:
1037:
1036:
1034:
1033:
1032:
1031:
1026:
1021:
1010:
1008:
1004:
1003:
1001:
1000:
999:
998:
993:
983:
978:
973:
967:
965:
959:
958:
956:
955:
950:
945:
939:
937:
931:
930:
928:
927:
922:
917:
911:
909:
900:
888:
887:
884:
883:
881:
880:
875:
870:
868:deltoid fascia
864:
862:
855:
854:
852:
851:
846:
845:
844:
839:
834:
829:
819:
813:
807:
801:
800:
791:
789:
788:
781:
774:
766:
760:
759:
724:
714:(2): 112–117.
703:
656:
653:
650:
649:
623:
596:(9): 821–823.
580:
553:
507:
486:
459:(3): 158–160.
440:
421:(1): 100–107.
402:
383:(1): 173–177.
364:
316:
287:(4): 320–323.
260:
236:
235:
233:
230:
229:
228:
223:
218:
213:
206:
203:
185:
182:
177:
174:
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126:
123:
98:
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88:
82:
81:
76:
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65:
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59:
53:
52:
47:
41:
40:
35:
29:
28:
24:
23:
15:
13:
10:
9:
6:
4:
3:
2:
1542:
1531:
1528:
1526:
1523:
1521:
1518:
1516:
1513:
1512:
1510:
1487:
1484:
1482:
1479:
1478:
1476:
1473:
1468:
1462:
1459:
1457:
1454:
1453:
1451:
1448:
1443:
1440:
1438:
1434:
1426:
1423:
1421:
1418:
1417:
1416:
1413:
1411:
1408:
1407:
1405:
1401:
1395:
1392:
1388:
1385:
1383:
1380:
1378:
1375:
1374:
1373:
1370:
1369:
1367:
1363:
1357:
1354:
1350:
1347:
1345:
1342:
1340:
1337:
1336:
1335:
1332:
1331:
1329:
1327:lateral volar
1325:
1322:
1320:
1316:
1306:
1303:
1301:
1298:
1297:
1295:
1291:
1285:
1282:
1278:
1275:
1273:
1270:
1269:
1268:
1265:
1263:
1260:
1259:
1257:
1255:
1251:
1241:
1238:
1234:
1231:
1229:
1226:
1224:
1221:
1220:
1219:
1216:
1214:
1211:
1210:
1208:
1205:
1200:
1194:
1191:
1189:
1186:
1184:
1181:
1177:
1173:
1170:
1168:
1165:
1164:
1163:
1160:
1159:
1157:
1154:
1149:
1146:
1144:
1140:
1130:
1127:
1125:
1122:
1120:
1117:
1116:
1114:
1111:
1106:
1100:
1097:
1095:
1092:
1090:
1087:
1085:
1082:
1080:
1077:
1076:
1074:
1071:
1066:
1063:
1061:
1057:
1054:
1051:
1046:
1042:
1030:
1027:
1025:
1022:
1020:
1017:
1016:
1015:
1012:
1011:
1009:
1005:
997:
994:
992:
989:
988:
987:
984:
982:
979:
977:
974:
972:
969:
968:
966:
964:
960:
954:
951:
949:
946:
944:
941:
940:
938:
936:
932:
926:
923:
921:
918:
916:
913:
912:
910:
908:
904:
901:
898:
893:
889:
879:
876:
874:
871:
869:
866:
865:
863:
860:
856:
850:
847:
843:
842:subscapularis
840:
838:
835:
833:
832:infraspinatus
830:
828:
827:supraspinatus
825:
824:
823:
820:
818:
815:
814:
811:
808:
806:
802:
798:
794:
787:
782:
780:
775:
773:
768:
767:
764:
756:
752:
747:
742:
738:
734:
730:
725:
721:
717:
713:
709:
704:
700:
696:
691:
686:
681:
676:
673:(9): e29691.
672:
668:
664:
659:
658:
654:
645:
641:
634:
627:
624:
619:
615:
611:
607:
603:
599:
595:
591:
584:
581:
576:
572:
568:
564:
563:Human Biology
557:
554:
549:
545:
541:
537:
533:
529:
525:
521:
514:
512:
508:
503:
499:
498:
490:
487:
482:
478:
474:
470:
466:
462:
458:
454:
447:
445:
441:
436:
432:
428:
424:
420:
416:
409:
407:
403:
398:
394:
390:
386:
382:
378:
371:
369:
365:
360:
356:
352:
348:
344:
340:
336:
332:
325:
323:
321:
317:
312:
308:
303:
298:
294:
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286:
282:
278:
271:
269:
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261:
256:
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238:
231:
227:
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209:
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183:
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175:
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163:
161:
154:
152:
150:
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133:
124:
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120:
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108:
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93:
87:
83:
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71:
66:
63:
60:
58:
54:
51:
48:
46:
42:
39:
36:
34:
30:
25:
20:
1471:
1446:
1414:
1403:intermediate
1365:medial volar
1266:
1203:
1153:superficial:
1152:
1109:
1070:superficial:
1069:
1050:compartments
1013:
985:
897:compartments
822:rotator cuff
739:(2): 30–32.
736:
732:
711:
707:
670:
666:
643:
639:
626:
593:
589:
583:
566:
562:
556:
523:
519:
501:
496:
489:
456:
452:
418:
414:
380:
376:
334:
330:
284:
280:
254:
253:(in Latin).
250:
240:
187:
179:
167:
158:
128:
102:
101:
78:
849:teres major
837:teres minor
646:(2): 59–63.
164:Development
68:Identifiers
1509:Categories
1447:posterior:
1415:interossei
1372:hypothenar
1162:mobile wad
925:brachialis
575:1301827777
337:(1): 3–9.
232:References
1472:anterior:
1410:lumbrical
1213:supinator
1143:posterior
935:posterior
755:238886068
569:(1): 23.
481:207024098
195:pathology
176:Functions
155:Variation
125:Structure
1272:extensor
1060:anterior
948:anconeus
907:anterior
805:Shoulder
699:36320946
618:42145116
571:ProQuest
540:27056052
473:24573895
351:24849464
311:18780016
257:: 28–29.
205:See also
191:swelling
1045:Forearm
991:lateral
817:deltoid
795:of the
793:Muscles
690:9615604
610:5911774
548:8544399
435:3805622
397:9523974
359:8863347
302:2584220
27:Details
1437:fascia
1425:palmar
1420:dorsal
1334:thenar
1277:flexor
1254:fascia
1176:brevis
1014:spaces
996:medial
963:fascia
920:biceps
859:fascia
753:
697:
687:
667:Cureus
616:
608:
573:
546:
538:
479:
471:
433:
395:
357:
349:
309:
299:
199:lipoma
45:Artery
33:System
1293:other
1204:deep:
1110:deep:
1007:other
751:S2CID
636:(PDF)
614:S2CID
544:S2CID
500:[
477:S2CID
355:S2CID
115:wrist
90:[
74:Latin
57:Nerve
1515:Hand
1319:Hand
1174:and
695:PMID
606:PMID
536:PMID
469:PMID
431:PMID
393:PMID
347:PMID
307:PMID
281:HAND
119:cyst
111:hand
892:Arm
797:arm
741:doi
716:doi
685:PMC
675:doi
598:doi
528:doi
461:doi
423:doi
385:doi
339:doi
297:PMC
289:doi
1511::
749:.
737:19
735:.
731:.
712:66
710:.
693:.
683:.
671:14
669:.
665:.
642:.
638:.
612:.
604:.
594:53
592:.
567:13
565:.
542:.
534:.
524:38
522:.
510:^
475:.
467:.
457:12
455:.
443:^
429:.
419:12
417:.
405:^
391:.
381:23
379:.
367:^
353:.
345:.
335:37
333:.
319:^
305:.
295:.
283:.
279:.
263:^
201:.
151:.
121:.
1052:)
1048:(
899:)
895:(
861::
785:e
778:t
771:v
757:.
743::
722:.
718::
701:.
677::
644:1
620:.
600::
577:.
550:.
530::
483:.
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387::
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341::
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291::
285:3
255:4
94:]
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