Article

Behavior Research Methods, Instruments, & Computers

, Volume 29, Issue 4, pp 589-594

First online:

Design and efficacy of a head-coil bite bar for reducing movement-related artifacts during functional MRI scanning

  • V. MenonAffiliated withDepartment of Psychiatry and Behavioral Sciences, Stanford University School of MedicineVeterans Affairs Palo Alto Health Care System Email author 
  • , K. O. LimAffiliated withDepartment of Psychiatry and Behavioral Sciences, Stanford University School of MedicineVeterans Affairs Palo Alto Health Care System
  • , J. H. AndersonAffiliated withVeterans Affairs Palo Alto Health Care System
  • , J. JohnsonAffiliated withDepartment of Psychiatry and Behavioral Sciences, Stanford University School of MedicineVeterans Affairs Palo Alto Health Care System
  • , A. PfefferbaumAffiliated withDepartment of Psychiatry and Behavioral Sciences, Stanford University School of MedicineVeterans Affairs Palo Alto Health Care System

Abstract

This article describes the design, construction, application, and effectiveness of a simple bite bar for use with an MRI whole-head coil to reduce head-movement-related artifacts during functional brain imaging. The device is comfortable to use and allows considerable flexibility in positioning the subject’s head. Eleven subjects were scanned while performing a motor-sequencing experiment with and without the bite bar. The bite bar was generally effective in reducing maximum head movement to less than 0.5 mm (translation) and 0.5° (rotation).