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Procedure-Oriented Torsional Anatomy of the Carpal Tunnel

Chiou-Tan, Faye Y. MD*; John, Joslyn MD*; Robinson, Lawrence R. MD; Cianca, John C. MD*; Taber, Katherine H. PhD*‡§

Journal of Computer Assisted Tomography: May/June 2018 - Volume 42 - Issue 3 - p 492–495
doi: 10.1097/RCT.0000000000000703
Graphic Anatomy

This is the fourth in a series of papers related to the concept of torsional anatomy. The objective of this paper is to provide musculoskeletal ultrasound anatomy of the carpal tunnel region in the position of hemispastic flexion as a reference for diagnostic and relevant needle procedures.

From the *Department of Physical Medicine and Rehabilitation, Baylor College of Medicine, Center for Trauma Rehabilitation Research, Quentin Mease Hospital, Harris County Hospital District, Houston, TX;

Division of Physical Medicine and Rehabilitation, Department of Medicine, University of Toronto, Toronto, Canada;

Veterans Affairs Mid-Atlantic (VISN 6) Mental Illness Research, Education, and Clinical Center, Durham; and

§Research and Academic Affairs Service Line, WG Hefner Veterans Affairs Medical Center, Salisbury, NC.

Received for publication October 26, 2017; accepted October 27, 2017.

Correspondence to: Faye Y. Chiou-Tan, MD, Department of Physical Medicine and Rehabilitation, Quentin Mease Hospital, Suite No. 240, 3601 N MacGregor Way, Houston, TX 77004 (e-mail:

The authors declare no conflict of interest.

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