title: A method to capture six-degrees-of-freedom mechanical measurements of isometric shoulder and elbow torques during event-related fMRI.
abstract: Functional magnetic resonance imaging (fMRI) experiments investigating cortical activity while controlling task performance are difficult to conduct due to the high magnetic field environment and a lack of compatible measurement tools. We describe a method to measure the generation of isometric shoulder and elbow torques with a six-degrees-of-freedom (DOF) load cell during an event-related fMRI study. Feasibility of this method is demonstrated by finding cortical activity on the motor cortices in a participant during an event-related study of shoulder abduction and elbow flexion. The described methodology permits researchers to control and measure intersubject and intrasubject motor task performance during event-related brain imaging.
authors.affiliation: Biomedical Engineering Department, Northwestern University, Chicago, IL, USA.
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Krainak
authors.forename: Todd B
authors.initials: TB
authors.lastname: Parrish
authors.forename: Julius P A
authors.initials: JP
authors.lastname: Dewald
mesh_terms: D000328:Adult; D016477:Artifacts; D001921:Brain / Q000502:physiology*; D004551:Elbow Joint / Q000502:physiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005071:Evoked Potentials / Q000502:physiology*; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008365:Manometry / Q000295:instrumentation / Q000379:methods; D018482:Muscle, Skeletal / Q000502:physiology; D009213:Myography / Q000295:instrumentation* / Q000379:methods; D016059:Range of Motion, Articular; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012785:Shoulder Joint / Q000502:physiology*; D014159:Transducers