Flexor Pollicis Brevis: Difference between revisions
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== Description == | == Description == | ||
Flexor Pollicis Brevis(FPB) is present on the radial border of the palm. FPB is one of the muscle of the thenar eminence of the hand. | |||
It also falls under the intrinsic muscle of the hand.<ref>Okwumabua E, Sinkler MA, Bordoni B. [https://www.ncbi.nlm.nih.gov/books/NBK537229/ Anatomy, Shoulder and Upper Limb, Hand Muscles]. StatPearls [Internet]. 2020 Jan.</ref> Flexor Pollicis Brevis is the small, narrow muscle consisting of the outer and inner portions. The outer portion is termed as the superficial head and the inner portion is termed as the deep head of the muscle.<ref name=":0">Koca K, Ekinci S, Ege T, Ozyurek S, Kurklu M, Battal B, Basbozkurt M. B[https://journals.sagepub.com/doi/full/10.4137/CMAMD.S8443 ilateral congenital absence of flexor pollicis brevis and abductor pollicis brevis muscles with bilateral thenar atrophy]: a case report. Clinical Medicine Insights: Arthritis and Musculoskeletal Disorders. 2012 Jan;5:CMAMD-S8443.</ref> | |||
=== Origin === | === Origin === | ||
The superficial Head is originated from the crest of the trapezium and flexor retinaculum. | |||
The deep head is originated from trapezoid and capitate bones and also from the palmar ligaments of the distal row of carpals bones. <ref name=":1">Caetano EB, da Cunha Nakamichi Y, de Andrade RA, Sawada MM, Nakasone MT, Vieira LA, Sabongi RG. [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5721304/ Flexor Pollicis Brevis Muscle]. Anatomical Study and Clinical Implications. The open orthopaedics journal. 2017;11:1321.</ref> | |||
=== Insertion === | === Insertion === | ||
The deep head unit with the superficial head after passing deeply from Flexor Pollicis Longus tendon on the radial sesamoid bone and the base of the proximal phalanx of the thumb.<ref name=":1" /> | |||
=== Nerve === | === Nerve === | ||
The superficial head has a single innervation by the median nerve and the deep head has a double innervation by the ulnar nerve(deep branch) and the median nerve ( recurrent branch).<ref name=":1" /> | |||
=== Artery === | === Artery === | ||
It is supplied by the branches of the radial artery.<ref name=":0" /> | |||
== Function == | == Function == | ||
Flexor Pollicis Brevis flex the metacarpophalangeal and carpometacarpal joints leading to the opposition of the thumb and, if continued, produces the medial rotation of the thumb. Due to this function, we are able to manipulate objects and create tools. It plays role in fine movements like precision, pinching, and power griping.<ref>Gupta S, Michelsen-Jost H. [https://www.sciencedirect.com/science/article/abs/pii/S0749071211000874?via%3Dihub Anatomy and function of the thenar muscles.] Hand clinics. 2012 Feb 1;28(1):1-7.</ref> | |||
== Clinical relevance == | == Clinical relevance == | ||
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<references /> | <references /> | ||
[[Category:Anatomy]] [[Category:Muscles]] | [[Category:Anatomy]] | ||
[[Category:Muscles]] | |||
Revision as of 18:28, 9 October 2020
Original Editor - User Name
Top Contributors - Kakshya Rupakheti, Shaimaa Eldib and Khloud Shreif
Description[edit | edit source]
Flexor Pollicis Brevis(FPB) is present on the radial border of the palm. FPB is one of the muscle of the thenar eminence of the hand.
It also falls under the intrinsic muscle of the hand.[1] Flexor Pollicis Brevis is the small, narrow muscle consisting of the outer and inner portions. The outer portion is termed as the superficial head and the inner portion is termed as the deep head of the muscle.[2]
Origin[edit | edit source]
The superficial Head is originated from the crest of the trapezium and flexor retinaculum.
The deep head is originated from trapezoid and capitate bones and also from the palmar ligaments of the distal row of carpals bones. [3]
Insertion[edit | edit source]
The deep head unit with the superficial head after passing deeply from Flexor Pollicis Longus tendon on the radial sesamoid bone and the base of the proximal phalanx of the thumb.[3]
Nerve[edit | edit source]
The superficial head has a single innervation by the median nerve and the deep head has a double innervation by the ulnar nerve(deep branch) and the median nerve ( recurrent branch).[3]
Artery[edit | edit source]
It is supplied by the branches of the radial artery.[2]
Function[edit | edit source]
Flexor Pollicis Brevis flex the metacarpophalangeal and carpometacarpal joints leading to the opposition of the thumb and, if continued, produces the medial rotation of the thumb. Due to this function, we are able to manipulate objects and create tools. It plays role in fine movements like precision, pinching, and power griping.[4]
Clinical relevance[edit | edit source]
Assessment[edit | edit source]
Treatment[edit | edit source]
Resources[edit | edit source]
- ↑ Okwumabua E, Sinkler MA, Bordoni B. Anatomy, Shoulder and Upper Limb, Hand Muscles. StatPearls [Internet]. 2020 Jan.
- ↑ 2.0 2.1 Koca K, Ekinci S, Ege T, Ozyurek S, Kurklu M, Battal B, Basbozkurt M. Bilateral congenital absence of flexor pollicis brevis and abductor pollicis brevis muscles with bilateral thenar atrophy: a case report. Clinical Medicine Insights: Arthritis and Musculoskeletal Disorders. 2012 Jan;5:CMAMD-S8443.
- ↑ 3.0 3.1 3.2 Caetano EB, da Cunha Nakamichi Y, de Andrade RA, Sawada MM, Nakasone MT, Vieira LA, Sabongi RG. Flexor Pollicis Brevis Muscle. Anatomical Study and Clinical Implications. The open orthopaedics journal. 2017;11:1321.
- ↑ Gupta S, Michelsen-Jost H. Anatomy and function of the thenar muscles. Hand clinics. 2012 Feb 1;28(1):1-7.
