Corrigendum: Analgesic Effects of Compression at Trigger Points Are Associated With Reduction of Frontal Polar Cortical Activity as Well as Functional Connectivity Between the Frontal Polar Area and Insula in Patients With Chronic Low Back Pain: A Randomized Trial
Kanae Kodama1 
Kouichi Takamoto1,2 
Hiroshi Nishimaru1 
Jumpei Matsumoto1 Yusaku Takamura1 Shigekazu Sakai1 Taketoshi Ono1 
Hisao Nishijo1*- 1Department of System Emotional Science, Faculty of Medicine, University of Toyama, Toyama, Japan
- 2Department of Sports and Health Sciences, Faculty of Human Sciences, University of East Asia, Shimonoseki, Japan
by Kodama, K., Takamoto, K., Nishimaru, H., Matsumoto, J., Takamura, Y., Sakai, S., et al. (2019). Front. Syst. Neurosci. 13:68. doi: 10.3389/fnsys.2019.00068
In the original article, there was an error. It was erroneously stated that the hemodynamic activity during compression at a non-MTrP decreased instead of increased and increased instead of decreased during compression at an MTrP.
A correction has been made to Results, Hemodynamic Responses, paragraph one:
“Compression significantly affected cerebral hemodynamic activity. Figure 4 shows typical examples of hemodynamic responses during compression for 30 s at MTrPs and non-MTrPs, shown as effect sizes of Oxy-Hb concentration. The topographical maps of effect sizes indicated that hemodynamic activity increased in the pPFC during compression at a non-MTrP (left panel in A), while hemodynamic activity decreased in the pPFC during compression at an MTrP (left panel in B). Temporal patterns of Oxy-Hb signals showed similar changes; oxy-Hb signals gradually increased in the pPFC during compression at non-MTrPs (right panel in A), while Oxy-Hb concentration gradually decreased in the pPFC during MTrP compression (right panel in B).”
The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.
Keywords: chronic low back pain, myofascial trigger point, prefrontal cortex, hemodynamic activity, oscillation, functional connectivity
Citation: Kodama K, Takamoto K, Nishimaru H, Matsumoto J, Takamura Y, Sakai S, Ono T and Nishijo H (2020) Corrigendum: Analgesic Effects of Compression at Trigger Points Are Associated With Reduction of Frontal Polar Cortical Activity as Well as Functional Connectivity Between the Frontal Polar Area and Insula in Patients With Chronic Low Back Pain: A Randomized Trial. Front. Syst. Neurosci. 13:81. doi: 10.3389/fnsys.2019.00081
Received: 03 December 2019; Accepted: 16 December 2019;
Published: 23 January 2020.
Edited by:
James W. Grau, Texas A&M University, United StatesReviewed by:
César Fernández-de-las-Peñas, Rey Juan Carlos University, SpainNoureddin Nakhostin Ansari, Tehran University of Medical Sciences, Iran
Copyright © 2020 Kodama, Takamoto, Nishimaru, Matsumoto, Takamura, Sakai, Ono and Nishijo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Hisao Nishijo, nishijo@med.u-toyama.ac.jp