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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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655:"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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542:Carpal tunnel and thenar and hypothenar eminences
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89:Relevant discussion may be found on the
360:is the mound formed at the base of the
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703:(3rd ed.). Dubuque: Wm C Brown.
478:deep palmar branch of the ulnar nerve
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504:recurrent branch of the median nerve
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405:the thumb. This muscle is the most
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364:on the palm of the hand by the
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230:Transverse section across the
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728:lesson5mus&tendonsofhand
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340:Anatomical terms of muscle
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578:Comparison facing thumbs
400:Abductor pollicis brevis
278:Control movement of the
255:Superficial palmar arch
138:This article cites its
1359:abductor digiti minimi
1349:opponens digiti minimi
1316:flexor pollicis brevis
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1160:extensor digiti minimi
1101:flexor pollicis longus
421:flexor pollicis longus
413:Flexor pollicis brevis
21:anatomical terminology
1234:bicipital aponeurosis
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566:Comparison, posterior
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554:Comparison, anterior
409:of the thenar group.
370:muscles of the thumb
82:factual accuracy is
1256:antebrachial fascia
1190:anatomical snuffbox
1001:triangular interval
958:intermuscular septa
850:infraspinous fascia
845:supraspinous fascia
590:Hypothenar eminence
493:hypothenar eminence
1458:palmar aponeurosis
1453:flexor retinaculum
1433:extensor expansion
1277:osborne's ligament
1155:extensor digitorum
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991:quadrangular space
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683:. Retrieved
679:the original
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658:. Retrieved
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610:Hand Clinics
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453:Nerve supply
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309:A01.2.07.023
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267:Median nerve
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157:January 2011
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44:
43:Please help
40:
821:teres major
809:teres minor
470:ulnar nerve
447:ulnar nerve
407:superficial
286:Identifiers
1481:Categories
1419:posterior:
1387:interossei
1344:hypothenar
1134:mobile wad
897:brachialis
685:2008-01-16
660:2008-01-16
616:(1): 1–7.
596:References
46:improve it
1444:anterior:
1382:lumbrical
1185:supinator
1115:posterior
907:posterior
449:instead.
391:Structure
91:talk page
52:talk page
1244:extensor
1032:anterior
920:anconeus
879:anterior
777:Shoulder
630:22117918
584:See also
486:T1 roots
385:(thenar)
84:disputed
1017:Forearm
963:lateral
789:deltoid
767:of the
765:Muscles
431:opposes
403:abducts
274:Actions
244:Details
140:sources
1409:fascia
1397:palmar
1392:dorsal
1306:thenar
1249:flexor
1226:fascia
1148:brevis
986:spaces
968:medial
935:fascia
892:biceps
831:fascia
715:Print.
707:
628:
443:distal
250:Artery
236:digits
217:digits
1265:other
1176:deep:
1082:deep:
979:other
643:θέναρ
383:θέναρ
380:
362:thumb
344:[
333:61520
292:Latin
280:thumb
262:Nerve
232:wrist
213:wrist
1487:Hand
1291:Hand
1146:and
705:ISBN
626:PMID
484:and
417:flex
356:The
304:TA98
234:and
215:and
142:but
864:Arm
769:arm
618:doi
368:of
328:FMA
321:306
316:TA2
1483::
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62:)
58:(
23:.
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