The pisiform is the only moving structure of the canalis carpi. In the power grip, it undergoes a posterior and medial movement, limited by the pisohamate ligament. This motion is indispensable for a good prehension. The strength of the pisohamate ligament effectively balances the dislocation tendency the flexors carpi ulnaris exert on the pisiform.
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The ulnar nerve is surrounded by the tendon expansion of the flexor carpi ulnaris muscle at the wrist: an anatomical study of Guyon's canal.
Anat Sci Int
June 2021
Department of Rehabilitation Sciences, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe, 654-0142, Japan.
The ulnar tunnel (Guyon's canal) is an osseofibrous tunnel for the ulnar nerve and artery. With regard to the proximal palmar wall (palmar carpal ligament) of the ulnar tunnel, detailed anatomical data such as attachment sites, fibrous continuity to surroundings, and variations have not been clearly described. In this study, topology of Guyon's canal was examined, especially to the palmar side of the ulnar nerve, focusing on the continuity of tendinous structures to reveal a more detailed constitution of Guyon's canal.
View Article and Find Full Text PDFAssessment of pisotriquetral misalignment with magnetic resonance imaging: Is it associated with trauma?
Eur Radiol
July 2017
Department of Radiology, Seoul National University Bundang Hospital, 300 Gumidong, Bundang-Gu, Seongnam-City, Gyeongi-Do, 463-707, Korea.
Objective: Our objective was to determine whether there is an association between pisotriquetral (PT) malalignment and acute distal radius fracture by using magnetic resonance imaging (MRI).
Methods: We evaluated 138 patients who underwent 3-T MRI of the wrists. Group A comprised 85 patients with acute distal radius fracture, and group B comprised 53 patients without trauma.
Feasibility and limitations of endoscopy in Guyon's canal.
Wideochir Inne Tech Maloinwazyjne
September 2014
Medical Centre of Postgraduate Education, Warsaw, Poland.
Introduction: This retrospective report summarizes observations from eight operations where the endoscopically assisted approach was used to explore Guyon's canal syndromes of idiopathic aetiology.
Aim: To evaluate the feasibility and limitations of endoscopic Guyon's canal release performed from a distal forearm incision.
Material And Methods: Eight charts and video records of eight ulnar tunnel syndrome patients presenting concomitant idiopathic Guyon's canal syndromes were retrospectively reviewed.
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