Motion tracking and electromyography assist the removal of mirror hand contributions to fNIRS images acquired during a finger tapping task performed by children with cerebral palsy

Nathan Hervey; Bilal Khan; Laura Shagman; Fenghua Tian; Mauricio R. Delgado; Kirsten Tulchin-Francis; Angela Shierk; Linsley Smith; Dahlia Reid; Nancy J. Clegg; Hanli Liu; Duncan MacFarlane; George Alexandrakis

doi:10.1117/12.2004352

8 March 2013 Motion tracking and electromyography assist the removal of mirror hand contributions to fNIRS images acquired during a finger tapping task performed by children with cerebral palsy

Nathan Hervey, Bilal Khan, Laura Shagman, Fenghua Tian, Mauricio R. Delgado, Kirsten Tulchin-Francis, Angela Shierk, Linsley Smith, Dahlia Reid, Nancy J. Clegg, Hanli Liu, Duncan MacFarlane, George Alexandrakis

Author Affiliations +

Proceedings Volume 8565, Photonic Therapeutics and Diagnostics IX; 856563 (2013) https://doi.org/10.1117/12.2004352
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

Functional neurological imaging has been shown to be valuable in evaluating brain plasticity in children with cerebral palsy (CP). In recent studies it has been demonstrated that functional near-infrared spectroscopy (fNIRS) is a viable and sensitive method for imaging motor cortex activities in children with CP. However, during unilateral finger tapping tasks children with CP often exhibit mirror motions (unintended motions in the non-tapping hand), and current fNIRS image formation techniques do not account for this. Therefore, the resulting fNIRS images contain activation from intended and unintended motions. In this study, cortical activity was mapped with fNIRS on four children with CP and five controls during a finger tapping task. Finger motion and arm muscle activation were concurrently measured using motion tracking cameras and electromyography (EMG). Subject-specific regressors were created from motion capture and EMG data and used in a general linear model (GLM) analysis in an attempt to create fNIRS images representative of different motions. The analysis provided an fNIRS image representing activation due to motion and muscle activity for each hand. This method could prove to be valuable in monitoring brain plasticity in children with CP by providing more consistent images between measurements. Additionally, muscle effort versus cortical effort was compared between control and CP subjects. More cortical effort was required to produce similar muscle effort in children with CP. It is possible this metric could be a valuable diagnostic tool in determining response to treatment.

Citation Download Citation

Nathan Hervey, Bilal Khan, Laura Shagman, Fenghua Tian, Mauricio R. Delgado, Kirsten Tulchin-Francis, Angela Shierk, Linsley Smith, Dahlia Reid, Nancy J. Clegg, Hanli Liu, Duncan MacFarlane, and George Alexandrakis "Motion tracking and electromyography assist the removal of mirror hand contributions to fNIRS images acquired during a finger tapping task performed by children with cerebral palsy", Proc. SPIE 8565, Photonic Therapeutics and Diagnostics IX, 856563 (8 March 2013); https://doi.org/10.1117/12.2004352

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available