title: The synchronous neural interactions test as a functional neuromarker for post-traumatic stress disorder (PTSD): a robust classification method based on the bootstrap.
abstract: Traumatic experiences can produce post-traumatic stress disorder (PTSD) which is a debilitating condition and for which no biomarker currently exists (Institute of Medicine (US) 2006 Posttraumatic Stress Disorder: Diagnosis and Assessment (Washington, DC: National Academies)). Here we show that the synchronous neural interactions (SNI) test which assesses the functional interactions among neural populations derived from magnetoencephalographic (MEG) recordings (Georgopoulos A P et al 2007 J. Neural Eng. 4 349-55) can successfully differentiate PTSD patients from healthy control subjects. Externally cross-validated, bootstrap-based analyses yielded >90% overall accuracy of classification. In addition, all but one of 18 patients who were not receiving medications for their disease were correctly classified. Altogether, these findings document robust differences in brain function between the PTSD and control groups that can be used for differential diagnosis and which possess the potential for assessing and monitoring disease progression and effects of therapy.
authors.affiliation: Brain Sciences Center, US Department of Veterans Affairs Medical Center (11B), Minneapolis, MN 55417, USA. omega@umn.edu
authors.forename: A P
authors.initials: AP
authors.lastname: Georgopoulos
authors.forename: H-R M
authors.initials: H-RM
authors.lastname: Tan
authors.forename: S M
authors.initials: SM
authors.lastname: Lewis
authors.forename: A C
authors.initials: AC
authors.lastname: Leuthold
authors.forename: A M
authors.initials: AM
authors.lastname: Winskowski
authors.forename: J K
authors.initials: JK
authors.lastname: Lynch
authors.forename: B
authors.initials: B
authors.lastname: Engdahl
mesh_terms: D001921:Brain / Q000187:drug effects / Q000503:physiopathology*; D005260:Female; D006801:Humans; D015225:Magnetoencephalography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011336:Probability; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013313:Stress Disorders, Post-Traumatic / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology*