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Research Article Open Access
Mild traumatic brain injury (mTBI) caused by blast-related and blunt head trauma is frequently encountered in clinical practice. Understanding the nuances between these two distinct types of injury leads to a more focused approach by clinicians to develop better treatment strategies for patients. In this study, we evaluated two separate cohorts of mTBI patients to ascertain whether any difference exists in vestibular-ocular reflex (VOR) testing (n 55 enrolled patients: 34 blunt, 21 blast) and vestibular-spinal reflex (VSR) testing (n 72 enrolled patients: 33 blunt, 39 blast). The VOR group displayed a preponderance of patients with blunt mTBI, demonstrating normal to high-frequency phase lag on rotational chair testing, whereas patients experiencing mTBI from blast-related causes revealed a trend toward low-frequency phase lag on evaluation. The VSR cohort showed that patients with posttraumatic migraineassociated dizziness tended to test higher on posturography. However, an indepth look at the total patient population in this second cohort reveals that a higher percentage of blast-exposed patients exhibited a significantly increased latency on motor control testing as compared to patients with blunt head injury ( p < .02). These experiments identify a distinct difference between blunt-injury and blast-injury mTBI patients and provide evidence that treatment strategies should be individualized on the basis of each mechanism of injury.
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Author(s): Michael E Hoffer Chadwick Donaldson Kim R Gottshall Carey Balaban and Ben J Balough
blast, head trauma, mild traumatic brain injury, vestibular disorders, war injuries