Attention is a core function in cognition and also the most prevalent cognitive deficit in mild traumatic brain injury
(mTBI). Predictive timing is an essential element of attention functioning because sensory processing and execution of
goal-oriented behavior are facilitated by temporally accurate prediction. It is hypothesized that impaired synchronization
between prediction and external events accounts for the attention deficit in mTBI. Other cognitive and somatic or
affective symptoms associated with mTBI may be explained as secondary consequences of impaired predictive timing.
Eye-Tracking Rapid Attention Computation (EYE-TRAC) is the quantification of predictive timing with indices of
dynamic visuo-motor synchronization (DVS) between the gaze and the target during continuous predictive visual
tracking. Such quantification allows for cognitive performance monitoring in comparison to the overall population as
well as within individuals over time. We report preliminary results of normative data and data collected from subjects
with a history of mTBI within 2 weeks of injury and post-concussive symptoms at the time of recruitment. A substantial
proportion of mTBI subjects demonstrated DVS scores worse than 95% of normal subjects. In addition, longitudinal
monitoring of acute mTBI subjects showed that initially abnormal DVS scores were followed by improvement toward
the normal range. In summary, EYE-TRAC provides fast and objective indices of DVS that allow comparison of
attention performance to a normative standard and monitoring of within-individual changes.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jun Maruta ; Jianliang Tong ; Stephanie W. Lee ; Zarah Iqbal ; Alison Schonberger, et al.
"EYE-TRAC: monitoring attention and utility for mTBI", Proc. SPIE 8371, Sensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring II; and Biometric Technology for Human Identification IX, 83710L (May 1, 2012); doi:10.1117/12.927790; http://dx.doi.org/10.1117/12.927790