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Marines with combined anti-armor team conduct weapon familiarization training June 3 at the North Training Area at Combined Arms Training Center Camp Fuji. It was the first time for many of the Marines to fire the AT-4 light anti-armor weapon. The Marines are with the CAAT of Weapons Company, 3rd Battalion, 6th Marine Regiment, which is currently assigned to 4th Marine Regiment, 3rd Marine Division, III Marine Expeditionary Force, under the unit deployment program. The combat correspondent captured the photo at a shutter speed of 1/160th of a second, creating a multiple-exposure effect of the AT-4 gunner, as well as capturing the dust being shaken from the Marines’ helmets as a result of the shockwave created from the concussion of the weapon’s back-blast. (U.S. Marine Corps photo by Cpl. Adam B. Miller/Released)
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Traumatic Brain Injury

A traumatic brain injury – or TBI – is the disruption of normal brain function caused by an external force, including a jolt or blow to the head. Not all blows or jolts to the head cause a TBI. A TBI may be classified as:

  • Mild (most common, also called a concussion)
  • Moderate
  • Severe
  • Penetrating

Possible Symptoms

  • Headaches
  • Dizziness or balance problems
  • Fatigue
  • Feeling depressed, anxious or irritable
  • Nausea
  • Sensitivity to light and sound
  • Sleep problems
  • Trouble with memory and attention
  • Vision changes
  • Impulsivity

For more information, download the What You Should Know About Concussions and Concussion Signs and Symptoms fact sheets.

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Last Updated: March 07, 2024
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