Abductor Pollicis Brevis: Difference between revisions

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'''Original Editor '''- [[User:User Name|User Name]]
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== Description<ref>Cael C. Functional anatomy. Philadelphia, PA: Wolters Kluwer/Lippincott, Williams & Wilkins; 2011.</ref>  ==
[[File:Abductor pollicis brevis.png|thumb|418x418px]]
Abductor pollicis brevis  [[muscle]] is the most lateral and superficial of the three muscles forming the thenar emirence.


=== '''Origin'''<ref>Palastanga N, Field D, Soames R. Anatomy and human movement. 4th ed. Oxford: Butterworth-Heinemann; 2002.</ref> ===
=== Description  ===
It takes its origin from the front of transverse carpal ligament, extending into the tubercles of scaphoid and trapezium with an occasional contribution from the tendon of abductor pollicis [[Abductor pollicis longus|longus]].
Abductor pollicis brevis [[muscle]] is the most lateral and superficial of the three muscles forming the thenar em<nowiki/>inence.<ref>Cael C. Functional anatomy. Philadelphia, PA: Wolters Kluwer/Lippincott, Williams & Wilkins; 2011</ref>


=== Insertion<ref>Lippert L, Lippert L. Clinical kinesiology and anatomy. 4th ed. Philadelphia: F.A. Davis; 2006.</ref> ===
=== Origin ===
The muscle has a short [[Tendon Anatomy|tendon]] which attaches  to the radial side of the base of the proximal phalanx of the thumb.
It takes its origin from the front of transverse carpal ligament, extending into the tubercles of scaphoid and trapezium with an occasional contribution from the tendon of [[Abductor pollicis longus|abductor pollicis longus.]]<ref>Palastanga N, Field D, Soames R. Anatomy and human movement. 4th ed. Oxford: Butterworth-Heinemann; 2002.</ref>


=== Nerve<ref name=":0">Tiwana MS, Sinkler MA, Bordoni B. Anatomy, Shoulder and Upper Limb, Triceps Muscle. StatPearls [Internet]. 2020 May 30.</ref> ===
=== Insertion  ===
[[Median Nerve|Median]] nerve C8, T1.
The muscle has a short [[Tendon Anatomy|tendon]] which attaches to the radial side of the base of the proximal phalanx of the thumb.<ref>Lippert L, Lippert L. Clinical kinesiology and anatomy. 4th ed. Philadelphia: F.A. Davis; 2006.</ref>  


=== Artery<ref name=":0" /> ===
=== Nerve ===
Princeps pollicis artery.
[[Median Nerve|Median nerve]] C8, T1.<ref name=":0">Tiwana MS, Sinkler MA, Bordoni B. Anatomy, Shoulder and Upper Limb, Triceps Muscle. StatPearls [Internet]. 2020 May 30</ref>


== Function<ref>The Muscles of the Hand - Thenar - Hypothenar - TeachMeAnatomy [Internet]. Teachmeanatomy.info. 2020 [cited 21 September 2020]. Available from: <nowiki>https://teachmeanatomy.info/upper-limb/muscles/hand/?fbclid=IwAR12pBXShD88Na_jqJc6bSMhslR1-4F573kwF60ZHdV3C67U7380Itmqgxk#Lumbricals</nowiki></ref> ==
=== Artery ===
It acts to abduct the carpometacarpal joint of the thumb.
Princeps pollicis artery.<ref name=":0" />


== Clinical relevance<ref>Harrison M. Common problems. Neurological Skills. 1987;:63-99.</ref>  ==
=== Function ===
* [[carpal tunel syndrome]].
It acts to abduct the carpometacarpal joint of the thumb.<ref>The Muscles of the Hand - Thenar - Hypothenar - TeachMeAnatomy [Internet]. Teachmeanatomy.info. 2020 [cited 21 September 2020]. Available from: <nowiki>https://teachmeanatomy.info/upper-limb/muscles/hand/?fbclid=IwAR12pBXShD88Na_jqJc6bSMhslR1-4F573kwF60ZHdV3C67U7380Itmqgxk#Lumbricals</nowiki></ref>
* Median and [[Ulnar Nerve|ulnar]] nerve lesion.
 
=== Clinical relevance<ref>Harrison M. Common problems. Neurological Skills. 1987;:63-99.</ref>  ===
* [[Carpal Tunnel Syndrome|Carpal tunel syndrome]]
* Median and [[Ulnar Nerve|ulnar nerve]] lesion
* [[Syringomyelia]]
* [[Syringomyelia]]
* [[Motor neurone disease]]
* [[Motor Neurone Disease MND|Motor neurone disease]]
* [[Peripheral neuropathy]]  
* [[Neuropathic Pain|Peripheral neuropathy]]  
 
=== Assessment  ===
The function can be tested by providing resistance to abduction up and away from the plane of the palm.<ref>UC San Diego's Practical Guide to Clinical Medicine [Internet]. Meded.ucsd.edu. 2020 [cited 22 September 2020]. Available from: <nowiki>https://meded.ucsd.edu/clinicalmed/joints3.html</nowiki></ref>
{{#ev:youtube|v=IYLm6rL3v-I|width}}<ref>MMT Abductor pollicis brevis & Adductor pollicis. Available from: https://www.youtube.com/watch?v=IYLm6rL3v-I&feature=emb_logo [Last accessed 1/10/2020]</ref>
 
=== Strength Tips  ===
There are some useful exercises to strengthen the abductor pollicis brevis muscle which include many common techniques that you can do in your own home on your own time.


== Assessment<ref>UC San Diego's Practical Guide to Clinical Medicine [Internet]. Meded.ucsd.edu. 2020 [cited 22 September 2020]. Available from: <nowiki>https://meded.ucsd.edu/clinicalmed/joints3.html</nowiki></ref> ==
{{#ev:youtube|pYsZLTrUT1I|width}}<ref>Exercises to Strengthen the Abductor Pollicis Brevis Muscle : Sports Conditioning. Available from: https://www.youtube.com/watch?v=pYsZLTrUT1I&feature=emb_logo [Last accessed 30/9/2020]</ref>
Function can be tested by providing resistance to abduction  up and away  from the plane of the palm.


== StrengthTips  ==


== Resources  ==
=== References  ===


<references />
<references />
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[[Category:Anatomy]]  
[[Category:Anatomy]]  
[[Category:Muscles]]
[[Category:Muscles]]
[[Category:Hand - Anatomy]]
[[Category:Hand - Muscles]]

Latest revision as of 18:07, 9 October 2020

Original Editor - User Name

Top Contributors - Anneta Adamou, Saumya Srivastava, Chrysolite Jyothi Kommu and Kim Jackson

Description[edit | edit source]

Abductor pollicis brevis muscle is the most lateral and superficial of the three muscles forming the thenar eminence.[1]

Origin[edit | edit source]

It takes its origin from the front of transverse carpal ligament, extending into the tubercles of scaphoid and trapezium with an occasional contribution from the tendon of abductor pollicis longus.[2]

Insertion[edit | edit source]

The muscle has a short tendon which attaches to the radial side of the base of the proximal phalanx of the thumb.[3]

Nerve[edit | edit source]

Median nerve C8, T1.[4]

Artery[edit | edit source]

Princeps pollicis artery.[4]

Function[edit | edit source]

It acts to abduct the carpometacarpal joint of the thumb.[5]

Clinical relevance[6][edit | edit source]

Assessment[edit | edit source]

The function can be tested by providing resistance to abduction up and away from the plane of the palm.[7]

[8]

Strength Tips[edit | edit source]

There are some useful exercises to strengthen the abductor pollicis brevis muscle which include many common techniques that you can do in your own home on your own time.

[9]


References[edit | edit source]

  1. Cael C. Functional anatomy. Philadelphia, PA: Wolters Kluwer/Lippincott, Williams & Wilkins; 2011
  2. Palastanga N, Field D, Soames R. Anatomy and human movement. 4th ed. Oxford: Butterworth-Heinemann; 2002.
  3. Lippert L, Lippert L. Clinical kinesiology and anatomy. 4th ed. Philadelphia: F.A. Davis; 2006.
  4. 4.0 4.1 Tiwana MS, Sinkler MA, Bordoni B. Anatomy, Shoulder and Upper Limb, Triceps Muscle. StatPearls [Internet]. 2020 May 30
  5. The Muscles of the Hand - Thenar - Hypothenar - TeachMeAnatomy [Internet]. Teachmeanatomy.info. 2020 [cited 21 September 2020]. Available from: https://teachmeanatomy.info/upper-limb/muscles/hand/?fbclid=IwAR12pBXShD88Na_jqJc6bSMhslR1-4F573kwF60ZHdV3C67U7380Itmqgxk#Lumbricals
  6. Harrison M. Common problems. Neurological Skills. 1987;:63-99.
  7. UC San Diego's Practical Guide to Clinical Medicine [Internet]. Meded.ucsd.edu. 2020 [cited 22 September 2020]. Available from: https://meded.ucsd.edu/clinicalmed/joints3.html
  8. MMT Abductor pollicis brevis & Adductor pollicis. Available from: https://www.youtube.com/watch?v=IYLm6rL3v-I&feature=emb_logo [Last accessed 1/10/2020]
  9. Exercises to Strengthen the Abductor Pollicis Brevis Muscle : Sports Conditioning. Available from: https://www.youtube.com/watch?v=pYsZLTrUT1I&feature=emb_logo [Last accessed 30/9/2020]