Radial styloid process

The radial styloid process is a projection of bone on the lateral surface of the distal radius bone.

Radial styloid process
Human arm bones diagram
Details
Identifiers
Latinprocessus styloideus radii
TA98A02.4.05.015
TA21225
FMA23524
Anatomical terms of bone

Structure

The radial styloid process is found on the lateral surface of the distal radius bone.[1] It extends obliquely downward into a strong, conical projection. The tendon of the brachioradialis attaches at its base.[2] 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.[3][4] This is due to the passage of the inflamed extensor pollicis brevis tendon and abductor pollicis longus tendon around it.[4][5]

The styloid process of the radius is a useful landmark during arthroscopic resection of the scaphoid bone.[6]

A prominent styloid process of the radius makes applying a wrist splint more difficult.[7]

References

Public domain This article incorporates text in the public domain from page 220 of the 20th edition of Gray's Anatomy (1918)

  1. Mansfield, Paul Jackson; Neumann, Donald A. (2019-01-01), Mansfield, Paul Jackson; Neumann, Donald A. (eds.), "Chapter 6 - Structure and Function of the Wrist", Essentials of Kinesiology for the Physical Therapist Assistant (Third Edition), St. Louis (MO): Mosby, pp. 120–140, ISBN 978-0-323-54498-6, retrieved 2021-01-07
  2. Freehafer, Alvin A.; Hunter Peckham, P.; Keith, Michael W.; Mendelson, Laurel S. (1988-01-01). "The brachioradialis: Anatomy, properties, and value for tendon transfer in the tetraplegic". The Journal of Hand Surgery. 13 (1): 99–104. doi:10.1016/0363-5023(88)90210-9. ISSN 0363-5023. PMID 3351238.
  3. Cooper, Cynthia (2014-01-01), Cooper, Cynthia (ed.), "28 - Elbow, Wrist, and Hand Tendinopathies", Fundamentals of Hand Therapy (Second Edition), St. Louis: Mosby, pp. 383–393, doi:10.1016/b978-0-323-09104-6.00028-6, ISBN 978-0-323-09104-6, retrieved 2020-12-12
  4. Howard, Thomas M; Rassner, Leslie H (2008-01-01), Seidenberg, Peter H.; Beutler, Anthony I. (eds.), "Chapter 48 - Therapeutic and Diagnostic Injections and Aspirations", The Sports Medicine Resource Manual, Philadelphia: W.B. Saunders, pp. 574–597, doi:10.1016/b978-141603197-0.10047-3, ISBN 978-1-4160-3197-0, retrieved 2020-12-12
  5. Waldman, Steven D. (2019-01-01), Waldman, Steven D. (ed.), "52 - de Quervain's Tenosynovitis", Atlas of Common Pain Syndromes (Fourth Edition), Philadelphia: Elsevier, pp. 204–207, doi:10.1016/b978-0-323-54731-4.00052-9, ISBN 978-0-323-54731-4, retrieved 2020-12-12
  6. Tomaino, Matthew M.; Leit, Michael (2010-01-01), Slutsky, David J. (ed.), "CHAPTER 37 - Arthroscopic/Open Distal Scaphoid Resection", Principles and Practice of Wrist Surgery, Philadelphia: W.B. Saunders, pp. 397–402, ISBN 978-1-4160-5646-1, retrieved 2020-12-12
  7. Fess, Elaine Ewing; Gettle, Karan S.; Philips, Cynthia A.; Janson, J. Robin, eds. (2005-01-01), "CHAPTER 8 - Design Principles", Hand and Upper Extremity Splinting (Third Edition), Saint Louis: Mosby, pp. 210–236, doi:10.1016/b978-080167522-5.50013-7, ISBN 978-0-8016-7522-5, retrieved 2020-12-12
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