The Role of Hypoxia on Subconcussive Head Impacts

Status Completed

Clinical Trial Summary

The purpose of this study is to examine the combined effects of hypoxia and a short bout of subconcussive head impacts on neurocognitive and ocular-motor function and plasma expression of brain-derived blood biomarkers.

Clinical Trial Description

The purpose of the pilot study is to observe preliminary trends in neural response to subconcussive head impacts in hypoxic condition. This work will provide a critical un-tested knowledge regarding the combined effects of subconcussion and hypoxic condition (mimicking high altitude), which will be used in our upcoming grant proposal to the Department of Defense (DoD). Military personnel, particularly those who are deployed to Afghanistan, are constantly subjected to hypoxic condition, given that the majority of military land operations in Afghanistan occur at 2000-3000 meters (6500-10,000 feet). This level of altitude does not elicit major side effects, yet neural functions may experience some degree of perturbation (i.e., slowed reaction time, altered night vision). Concurrently, these military personnel, who operate at high altitudes, often incur subconcussive forces to the head. These subconcussive head impacts can be induced by exposure to, for example, flash-bang grenades, artillery fire, recoilless rifle, improvised explosive devices (IEDs), and head collision. The combined effects of these two stressors have the potential to attenuate one's readiness, operational efficiency, and overall brain function, but the combined effects have never been studied to date. As a result, one of four study topics that the Defense Centers of Excellence deems urgent is: Document the effects of altitude exposure on mild traumatic brain injury (mTBI) and blast-induced neurotrauma (BINT). To answer the question, we hypothesized that there will be an exponential worsening in neurocognitive function and in ocular-motor system functioning, and increased plasma expression of brain-derived biomarkers, after subconcussive head impacts under hypoxic conditions. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT04624152
Study type	Interventional
Source	Indiana University
Contact
Status	Completed
Phase	N/A
Start date	October 22, 2018
Completion date	May 1, 2019

View Details

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.