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The flexor pollicis brevis has two heads a superficial and a deep. The flexor pollicis brevis (FPB) is typically an ulnar-innervated muscle. Due to a common interconnection between the median and ulnar nerves in the hand (Riche-Cannieu interconnection), the Median nerve may innervate the FPB in 35%
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to flexor pollicis brevis. Despite the name, adductor pollicis is chiefly responsible for rotation and opposition. This muscle is not in the thenar group of muscles, and is supplied by the
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The innervation of these muscles by the median nerve is unusual, as most of the intrinsic muscles on the palm of the hand are supplied by the ulnar nerve. The lateral two
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innervate the opponens pollicis and/or abductor pollicis brevis. Regardless of their final innervation, the nerves that reach the thenar muscles arise from the
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the thumb, bringing it against the fingers. This is a very important movement, as most of human hand dexterity comes from this action.
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of people. It is innervated by the Ulnar nerve in 50% of people and by both the median and ulnar nerves in 15%.
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Gupta, S; Michelsen-Jost, H (February 2012). "Anatomy and function of the thenar muscles".
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The opponens pollicis and abductor pollicis brevis are normally innervated by the
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666:"Intrinsic Muscles of the Hand — Wheeless' Textbook of Orthopaedics"
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The following three muscles are considered part of the thenar eminence:
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The ulnar nerve is exclusively responsible for the innervations of the
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Mound at the base of the thumb formed by the intrinsic group of muscles
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The mucous sheaths of the tendons on the anterior surface of the
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lies deep to abductor pollicis brevis. As its name suggests it
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at The
Anatomy Lesson by Wesley Norman (Georgetown University)
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You can help by providing page numbers for existing citations.
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The muscles in this location are usually innervated by the
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Another muscle that controls movement of the thumb is
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The adductor pollicis is typically innervated by the
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553:Carpal tunnel and thenar and hypothenar eminences
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430:the thumb, curling it up in the palm. (The
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517:. They all control movement of the thumb.
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196:Learn how and when to remove this message
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426:, which lies next to the abductor, will
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100:Relevant discussion may be found on the
371:is the mound formed at the base of the
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714:(3rd ed.). Dubuque: Wm C Brown.
489:deep palmar branch of the ulnar nerve
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416:the thumb. This muscle is the most
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686:"Applied MSK anatomy of the hand"
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710:Van De Graaff, Kent M. (1992).
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375:on the palm of the hand by the
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241:Transverse section across the
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739:lesson5mus&tendonsofhand
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452:. It lies deeper and more
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351:Anatomical terms of muscle
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589:Comparison facing thumbs
411:Abductor pollicis brevis
289:Control movement of the
266:Superficial palmar arch
149:This article cites its
1370:abductor digiti minimi
1360:opponens digiti minimi
1327:flexor pollicis brevis
1176:extensor carpi ulnaris
1171:extensor digiti minimi
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424:Flexor pollicis brevis
32:anatomical terminology
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1072:flexor carpi radialis
577:Comparison, posterior
1439:extensor retinaculum
1077:flexor carpi ulnaris
565:Comparison, anterior
420:of the thenar group.
381:muscles of the thumb
93:factual accuracy is
1267:antebrachial fascia
1201:anatomical snuffbox
1012:triangular interval
969:intermuscular septa
861:infraspinous fascia
856:supraspinous fascia
601:Hypothenar eminence
504:hypothenar eminence
1469:palmar aponeurosis
1464:flexor retinaculum
1444:extensor expansion
1288:osborne's ligament
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1033:compartments
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805:rotator cuff
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694:. Retrieved
690:the original
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669:. Retrieved
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621:Hand Clinics
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470:median nerve
467:
464:Nerve supply
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320:A01.2.07.023
307:
278:Median nerve
192:
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168:January 2011
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55:
54:Please help
51:
832:teres major
820:teres minor
481:ulnar nerve
458:ulnar nerve
418:superficial
297:Identifiers
1492:Categories
1430:posterior:
1398:interossei
1355:hypothenar
1145:mobile wad
908:brachialis
696:2008-01-16
671:2008-01-16
627:(1): 1–7.
607:References
57:improve it
1455:anterior:
1393:lumbrical
1196:supinator
1126:posterior
918:posterior
460:instead.
402:Structure
102:talk page
63:talk page
1255:extensor
1043:anterior
931:anconeus
890:anterior
788:Shoulder
641:22117918
595:See also
497:T1 roots
396:(thenar)
95:disputed
1028:Forearm
974:lateral
800:deltoid
778:of the
776:Muscles
442:opposes
414:abducts
285:Actions
255:Details
151:sources
1420:fascia
1408:palmar
1403:dorsal
1317:thenar
1260:flexor
1237:fascia
1159:brevis
997:spaces
979:medial
946:fascia
903:biceps
842:fascia
726:Print.
718:
639:
454:distal
261:Artery
247:digits
228:digits
1276:other
1187:deep:
1093:deep:
990:other
654:θέναρ
394:θέναρ
391:
373:thumb
355:[
344:61520
303:Latin
291:thumb
273:Nerve
243:wrist
224:wrist
1498:Hand
1302:Hand
1157:and
716:ISBN
637:PMID
495:and
428:flex
367:The
315:TA98
245:and
226:and
153:but
875:Arm
780:arm
629:doi
379:of
339:FMA
332:306
327:TA2
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635:.
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493:C8
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