Acute Assessment of Traumatic Brain Injury and Post-Traumatic Stress After Exposure to a Deployment-Related Explosive Blast.

Introduction: Traumatic brain injury (TBI) and post-traumatic stress disorder (PTSD) are two of the signature injuries in military service members who have been exposed to explosive blasts during deployments to Iraq and Afghanistan. Acute stress disorder (ASD), which occurs within 2-30 d after trauma exposure, is a more immediate psychological reaction predictive of the later development of PTSD. Most previous studies have evaluated service members after their return from deployment, which is often months or years after the initial blast exposure.

Utility of a multimodal neurophysiologic assessment tool in distinguishing between individuals with and without a history of mild traumatic brain injury.

This was a preliminary validation study of a multimodal concussion assessment battery incorporating eye-tracking, balance, and neurocognitive tests on a new hardware platform, the Computerized Brain Injury Assessment System. Using receiver-operating characteristics analyses, (1) we identified a subset of the most discriminating neurophysiological assessment tests involving smooth pursuit eye movement tracking errors, corrective saccade counts, a balance score ratio sensitive to vestibular balance performance, and two neurocognitive tests of response speed and memory/incidental learning; (2) we demonstrated the enhancement in discriminatory capability of detecting concussion-related deficits through the combination of the identified subset of assessments; and (3) we demonstrated the effectiveness of a robust and readily implemented global scoring approach was demonstrated for both eye track and balance assessment tests. These results are significant in introducing a comprehensive solution for concussion assessment that incorporates an economical, compact, and mobile hardware system and an assessment battery that is multimodal and time efficient and whose efficacy has been demonstrated on a preliminary basis.

Drop-Jump Landing Varies With Baseline Neurocognition: Implications for Anterior Cruciate Ligament Injury Risk and Prevention.

Background: Neurocognitive status may be a risk factor for anterior cruciate ligament (ACL) injury. Neurocognitive domains such as visual attention, processing speed/reaction time, and dual-tasking may influence ACL injury risk via alterations to neuromuscular performance during athletic tasks. However, the relationship between neurocognition and performance during athletic tasks is not yet established.

Sports concussion assessment and management: future research directions.

Over the past 2 decades, major progress has been achieved toward advancing the translational science of sport-related concussion (SRC), paving the way for evidence-based guidelines for injury diagnosis, evaluation and management. Several key empirical questions on the basic and clinical science of SRC, however, remain unanswered. The aim of this summary article is to highlight gaps in the existing science of SRC and to propose a platform for the next generation of SRC research.

Return to combat duty after concussive blast injury.

Little data exist regarding the acute assessment of blast concussion and the course of recovery in the combat zone, as most research has examined service members long after they have returned home. This manuscript examined a case series of 377 service members seen for acute concussion evaluation following medical evacuation from the battlefield in Helmand Province, Afghanistan. Of these, 111 were assessed for concussion prior to their return to the continental USA for other severe physical injuries.

Mild traumatic brain injury: lessons learned from clinical, sports, and combat concussions.

Over the past forty years, a tremendous amount of information has been gained on the mechanisms and consequences of mild traumatic brain injuries. Using sports as a laboratory to study this phenomenon, a natural recovery curve emerged, along with standards for managing concussions and returning athletes back to play. Although advances have been made in this area, investigation into recovery and return to play continues.

Differential rates of recovery after acute sport-related concussion: electrophysiologic, symptomatic, and neurocognitive indices.

Purpose: To determine if motor evoked potentials (MEPs), postconcussion signs and symptoms, and neurocognitive functions follow a similar recovery pattern after concussion.

Methods: Nine collegiate athletes with acute concussion (>24 hours after injury) participated in this retrospective time series design. Transcranial magnetic stimulation was applied over the motor cortex, and MEPs were recorded from the contralateral upper extremity.

Movements during sleep correlate with impaired attention and verbal and memory skills in children with adenotonsillar hypertrophy suspected of having obstructive sleep disordered breathing.

Background: Children with obstructive sleep disordered breathing (OSDB) have both impaired cognitive performance and frequent movements during sleep. It is not known whether movements during sleep are related to cognitive function.

Methods: We studied 56 children with adenotonsillar hypertrophy suspected of having OSDB with actigraphy for six consecutive days and nights, followed by cognitive and performance tests.

The relationship between psychological distress and baseline sports-related concussion testing.

Objective: This study examined the effect of psychological distress on neurocognitive performance measured during baseline concussion testing.

Design: Archival data were utilized to examine correlations between personality testing and computerized baseline concussion testing. Significantly correlated personality measures were entered into linear regression analyses, predicting baseline concussion testing performance.

A preliminary investigation of motor evoked potential abnormalities following sport-related concussion.

Background: Assessment of concussion is primarily based on self-reported symptoms, neurological examination and neuropsychological testing. The neurophysiologic sequelae and the integrity of the corticomotor pathways could be obtained by evaluating motor evoked potentials (MEPs).

Objectives: To compare MEPs obtained through transcranial magnetic stimulation (TMS) in acutely concussed and non-concussed collegiate athletes.

A review of driving simulator parameters relevant to the Operation Enduring Freedom/Operation Iraqi Freedom veteran population.

There is currently a pressing need for safe, reliable, cost-effective methods of evaluating driving ability. With recent improvements in virtual reality technology, driving simulators seem to offer a promising alternative to on-road methods of driving assessment. One population at risk for driving difficulties may be veterans returning from combat in Iraq or Afghanistan.

Neuropsychological consequences of boxing and recommendations to improve safety: a National Academy of Neuropsychology education paper.

Boxing has held appeal for many athletes and audiences for centuries, and injuries have been part of boxing since its inception. Although permanent and irreversible neurologic dysfunction does not occur in the majority of participants, an association has been reported between the number of bouts fought and the development of neurologic, psychiatric, or histopathological signs and symptoms of encephalopathy in boxers. The purpose of this paper is to (i) provide clinical neuropsychologists, other health-care professionals, and the general public with information about the potential neuropsychological consequences of boxing, and (ii) provide recommendations to improve safety standards for those who participate in the sport.

Recommendations for diagnosing a mild traumatic brain injury: a National Academy of Neuropsychology education paper.

A special interest group of the American Congress of Rehabilitation Medicine [ACRM; Mild Traumatic Brain Injury Committee. (1993). Definition of mild traumatic brain injury.

Secretive recording of neuropsychological testing and interviewing: official position of the National Academy of Neuropsychology.

Neuropsychologists are occasionally asked to have neuropsychological testing observed via the presence of a third party, through one-way mirrors, or with audio or video monitoring or recording devices. The primary reasons for not allowing observation are its effect on the validity of the examination results and the security of copyrighted test materials. To overcome the problem of observer effects on the examinee's performance, some individuals have suggested that examinations be monitored or recorded without the examinee's awareness (i.

SLAM on the stand: how the sports-related concussion literature can inform the expert witness.

Mild head injury is a controversial topic because patients may have subtle deficits and widely varied outcomes. Accordingly, neuropsychologists are frequently asked to provide expert testimony about the nature of mild head injury. This article discusses how the sports-related concussion literature, including the concept of baseline assessment, can inform expert witnesses who are asked to provide such testimony.

Long-term outcomes and prognostic factors in pediatric patients with severe traumatic brain injury and elevated intracranial pressure.

Object: The management strategies and outcomes in pediatric patients with elevated intracranial pressure (ICP) following severe traumatic brain injury (TBI) are examined in this study.

Methods: This study was a retrospective review of a prospectively acquired pediatric trauma database. More than 750 pediatric patients with brain injury were seen over a 10-year period.

The prediction of change: normative neuropsychological trajectories.

While the application of normative standards is vital to the practice of clinical neuropsychology, data regarding normative change remains scarce despite the frequency of serial assessments. Based on 285 normal individuals, we provide co-normed baseline data with demographic adjustments and test-retest standardized regression based (SRB) models for three time points for several measures. These models delineate normal, expected change across time, and yield standardized z-scores that are comparable across tests.

Community-integrated brain injury rehabilitation: Treatment models and challenges for civilian, military, and veteran populations.

Traumatic brain injury (TBI) is a major health problem in civilian, military, and veteran populations. Individuals experiencing moderate to severe TBI require a continuum of care involving acute hospitalization and postacute rehabilitation, including community reintegration and, one would hope, a return home to function as a productive member of the community. In the military, the goal is to help individuals with TBI return to active duty or make an optimal return to civilian life if the extent of their injuries necessitates a "medical board" discharge.

Neuropsychological evaluation in the diagnosis and management of sports-related concussion.

A mild traumatic brain injury in sports is typically referred to as a concussion. This is a common injury in amateur and professional athletics, particularly in contact sports. This injury can be very distressing for the athlete, his or her family, coaches, and school personnel.

Learning disabilities: the need for neuropsychological evaluation.

A learning disability (LD) is a neurobiological disorder that presents as a serious difficulty with reading, arithmetic, and/or written expression that is unexpected, given the individual's intellectual ability. A learning disability is not an emotional disorder nor is it caused by an emotional disorder. If inadequately or improperly evaluated, a learning disability has the potential to impact an individual's functioning adversely and produce functional impairment in multiple life domains.

Comparative utility of Barona Formulae, Wtar demographic algorithms, and WRAT-3 reading for estimating premorbid ability in a diverse research sample.

Various Barona formulae, a WTAR algorithm based on demographic data, and WRAT-3 oral reading methods of estimating premorbid ability were compared in a diverse research sample of 119 subjects. These methods were correlated with one another and with a modified version of the Raven Standard Progressive Matrices. Descriptive data are provided to illustrate advantages and disadvantages of various methods of estimating premorbid ability when no formal intellectual testing is available.

Reduced time in bed and obstructive sleep-disordered breathing in children are associated with cognitive impairment.

Objective: The purpose of this study was to determine if reduced time in bed as well as the degree of obstructive sleep-disordered breathing predicted the risk of impaired cognitive function in children with adenotonsillar hypertrophy suspected of having obstructive sleep-disordered breathing.

Design: We studied 56 children, aged 6 to 12 years, with adenotonsillar hypertrophy referred for suspected obstructive sleep-disordered breathing. Children were given a sleep diary and underwent wrist actigraphy for 6 consecutive days and nights.