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Anatomical snuffbox
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==Structure== ===Boundaries=== * The medial border (ulnar side) of the snuffbox is the [[tendon]] of the [[extensor pollicis longus]] * The lateral border (radial side) is a pair of parallel and intimate tendons, of the [[extensor pollicis brevis]] and the [[abductor pollicis longus]].<ref name="titleChapter 10: THE FOREARM">{{cite web |url=http://www.dartmouth.edu/~humananatomy/part_2/chapter_10.html#chpt_10_muscles_back |title=Chapter 10: THE FOREARM |access-date=2008-01-05 | archive-url= https://web.archive.org/web/20071209190234/http://www.dartmouth.edu/~humananatomy/part_2/chapter_10.html| archive-date= 9 December 2007 | url-status= live}}</ref> (Accordingly, the anatomical snuffbox is most visible, having a more pronounced concavity, during thumb [[Extension (kinesiology)|extension]].) * The [[Anatomical terms of location#Proximal and distal|proximal]] border is formed by the [[Radial styloid process|styloid process]] of the [[Radius (bone)|radius]] * The [[Anatomical terms of location#Proximal and distal|distal]] border is formed by the approximate apex of the schematic snuffbox [[isosceles]] triangle. * The floor of the snuffbox varies depending on the position of the wrist, but both the [[Trapezium (bone)|trapezium]] and primarily the [[scaphoid]] can be palpated. === Neurovascular anatomy === Deep to the tendons which form the borders of the anatomical snuff box lies the [[radial artery]], which passes through the anatomical snuffbox on its course from the normal radial pulse detecting area, to the proximal space in between the first and second [[metacarpals]] to contribute to the [[Superficial palmar arch|superficial]] and [[deep palmar arch]]es. In the anatomical snuffbox, the radial artery is closely related (<2 mm) with the [[superficial branch of radial nerve]] near the styloid process of radius in 48%, while in 24% the radial artery is openly related to the [[lateral cutaneous nerve of forearm]].<ref>{{Cite journal|last=Robson|first=A. J.|last2=See|first2=M. S.|last3=Ellis|first3=H.|date=2008|title=Applied anatomy of the superficial branch of the radial nerve|journal=Clinical Anatomy|volume=21|issue=1|pages=38β45|doi=10.1002/ca.20576|issn=1098-2353|pmid=18092362}}</ref> The [[cephalic vein]] arises within the anatomical snuffbox, while the [[Superficial branch of radial nerve|dorsal cutaneous branch]] of the [[radial nerve]] can be palpated by stroking along the extensor pollicis longus with the dorsal aspect of a fingernail.
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