radial styloid process
{{Short description|Bone projection on the radius}}
{{Infobox bone
| Name = Radial styloid process
| Latin = processus styloideus radii
| Caption = Bones of left forearm. Anterior aspect. (Styloid process of radius labeled at bottom right.)
| Image2 = Human arm bones diagram.svg
| Caption2 = Human arm bones diagram
}}
The radial styloid process is a projection of bone on the lateral surface of the distal radius bone.
Structure
The radial styloid process is found on the lateral surface of the distal radius bone.{{Citation|last1=Mansfield|first1=Paul Jackson|title=Chapter 6 - Structure and Function of the Wrist|date=2019-01-01|url=http://www.sciencedirect.com/science/article/pii/B9780323544986000060|work=Essentials of Kinesiology for the Physical Therapist Assistant (Third Edition)|pages=120–140|editor-last=Mansfield|editor-first=Paul Jackson|place=St. Louis (MO)|publisher=Mosby|language=en|isbn=978-0-323-54498-6|access-date=2021-01-07|last2=Neumann|first2=Donald A.|editor2-last=Neumann|editor2-first=Donald A.}} It extends obliquely downward into a strong, conical projection. The tendon of the brachioradialis attaches at its base.{{Cite journal|last1=Freehafer|first1=Alvin A.|last2=Hunter Peckham|first2=P.|last3=Keith|first3=Michael W.|last4=Mendelson|first4=Laurel S.|date=1988-01-01|title=The brachioradialis: Anatomy, properties, and value for tendon transfer in the tetraplegic|url=https://dx.doi.org/10.1016%2F0363-5023%2888%2990210-9|journal=The Journal of Hand Surgery|language=en|volume=13|issue=1|pages=99–104|doi=10.1016/0363-5023(88)90210-9|pmid=3351238|issn=0363-5023}} The radial collateral ligament of the wrist attaches at its apex. The lateral surface is marked by a flat groove for the tendons of the abductor pollicis longus and extensor pollicis brevis.
Clinical significance
Breakage of the radius at the radial styloid is known as a Chauffeur's fracture; it is typically caused by compression of the scaphoid bone of the hand against the styloid.
De Quervain syndrome causes pain over the styloid process of the radius.{{Citation|last=Cooper|first=Cynthia|title=28 - Elbow, Wrist, and Hand Tendinopathies|date=2014-01-01|url=http://www.sciencedirect.com/science/article/pii/B9780323091046000286|work=Fundamentals of Hand Therapy (Second Edition)|pages=383–393|editor-last=Cooper|editor-first=Cynthia|place=St. Louis|publisher=Mosby|language=en|doi=10.1016/b978-0-323-09104-6.00028-6|isbn=978-0-323-09104-6|access-date=2020-12-12}}{{Citation|last1=Howard|first1=Thomas M|title=Chapter 48 - Therapeutic and Diagnostic Injections and Aspirations|date=2008-01-01|url=http://www.sciencedirect.com/science/article/pii/B9781416031970100473|work=The Sports Medicine Resource Manual|pages=574–597|editor-last=Seidenberg|editor-first=Peter H.|place=Philadelphia|publisher=W.B. Saunders|language=en|doi=10.1016/b978-141603197-0.10047-3|isbn=978-1-4160-3197-0|access-date=2020-12-12|last2=Rassner|first2=Leslie H|editor2-last=Beutler|editor2-first=Anthony I.}} This is due to the passage of the inflamed extensor pollicis brevis tendon and abductor pollicis longus tendon around it.{{Citation|last=Waldman|first=Steven D.|title=52 - de Quervain's Tenosynovitis|date=2019-01-01|url=http://www.sciencedirect.com/science/article/pii/B9780323547314000529|work=Atlas of Common Pain Syndromes (Fourth Edition)|pages=204–207|editor-last=Waldman|editor-first=Steven D.|place=Philadelphia|publisher=Elsevier|language=en|doi=10.1016/b978-0-323-54731-4.00052-9|isbn=978-0-323-54731-4|access-date=2020-12-12}}
The styloid process of the radius is a useful landmark during arthroscopic resection of the scaphoid bone.{{Citation|last1=Tomaino|first1=Matthew M.|title=CHAPTER 37 - Arthroscopic/Open Distal Scaphoid Resection|date=2010-01-01|url=http://www.sciencedirect.com/science/article/pii/B9781416056461000370|work=Principles and Practice of Wrist Surgery|pages=397–402|editor-last=Slutsky|editor-first=David J.|place=Philadelphia|publisher=W.B. Saunders|language=en|isbn=978-1-4160-5646-1|access-date=2020-12-12|last2=Leit|first2=Michael}}
A prominent styloid process of the radius makes applying a wrist splint more difficult.{{Citation|title=CHAPTER 8 - Design Principles|date=2005-01-01|url=http://www.sciencedirect.com/science/article/pii/B9780801675225500137|work=Hand and Upper Extremity Splinting (Third Edition)|pages=210–236|editor-last=Fess|editor-first=Elaine Ewing|place=Saint Louis|publisher=Mosby|language=en|doi=10.1016/b978-080167522-5.50013-7|isbn=978-0-8016-7522-5|access-date=2020-12-12|editor2-last=Gettle|editor2-first=Karan S.|editor3-last=Philips|editor3-first=Cynthia A.|editor4-last=Janson|editor4-first=J. Robin}}
References
{{Gray's}}
External links
- {{PSUAnatomy|skel/hand2}}
{{Bones of upper extremity}}
{{Portal bar|Anatomy}}
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