pISSN 2288-6982
eISSN 2288-7105



Review Article

Phys. Ther. Korea 2021; 28(4): 235-244

Published online November 20, 2021

© Korean Research Society of Physical Therapy

Understanding the Left Right Judgement Test: A Literature Review

Asall Kim1,2 , PT, BPT, Chung-hwi Yi3 , PT, PhD

1Department of Physical Therapy, The Graduate School, Yonsei University, Wonju, 2Department of Rehabilitation Medicine, Seoul National University Bundang Hospital, Seongnam, 3Department of Physical Therapy, College of Software and Digital Healthcare Convergence, Yonsei University, Wonju, Korea

Correspondence to: Chung-hwi Yi

Received: September 15, 2021; Revised: September 29, 2021; Accepted: October 1, 2021

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background: The body schema, which is constantly updated using somatosensory information, enables accurate movement. Since pain is reported as a possible source to alter the body schema, the left right judgement test (LRJT) has been widely used in the pain rehabilitation. However, there was a lack of consistency in the effect of the pain on the LRJT results, and for the effect of the LRJT as a part of intervention programs for pain patients. The deeper understand of the LRJT is necessary for better reproducibility, and to expand the therapeutic applications of the LRJT in the pain and musculoskeletal rehabilitation.
Objects: This literature review aimed to understand the LRJT and to study the potential of the LRJT for therapeutic applications.
Methods: The PubMed database was searched for studies relevant to LRJT. To establish the query set, the term was regarded from various perspectives.
Results: The selected studies were classified into three categories: LRJT development, factors influencing LRJT, and therapeutic applications.
Conclusion: Left right judgement test is the evaluation tool for the integrity of body schema as well as a tool for implicit motor imagery. Pain, proprioception, and other factors influence the performance of the LRJT.

Keywords: Body image, Functional laterality, Judgment, Rehabilitation