It is thought that the forces from the injury disrupt the normal cellular activities in the reticular activating system located in these areas, and that this disruption produces the loss of consciousness often seen in concussion. The parts of the brain most affected by rotational forces are the midbrain and diencephalon. Studies with athletes have shown that the amount of force and the location of the impact are not necessarily correlated to the severity of the concussion or its symptoms, and have called into question the threshold for concussion previously thought to exist at around 70-75 g. The amount of rotational force is thought to be the major type of force to cause concussion and the largest component in its severity. In rotational movement, the head turns around its center of gravity, and in angular movement it turns on an axis other than its center of gravity. Concussion may be caused by impact forces, in which the head strikes or is struck by something, or impulsive forces, in which the head moves without itself being subject to blunt trauma (for example, when the chest hits something and the head snaps forward).įorces may cause linear, rotational, or angular movement of the brain, or a combination of these types of motion. The brain is surrounded by cerebrospinal fluid, one of the functions of which is to protect it from light trauma, but more severe impacts or the forces associated with rapid acceleration and deceleration may not be absorbed by this cushion. Punches in boxing deliver more rotational force to the head than impacts in sports such as football, and boxing carries a higher risk of concussion than football. and Australia, transportation is the largest cause. For example, in Scotland and Sweden, falls account for the greatest percentage of MHIs, while in the U.S. The relative contribution of causes of mild head injury differs by region, gender, and age. infantry soldiers who return from the Iraq War meeting the criteria for MTBI. Soldiers are at elevated risk for concussion from causes such as bomb blasts, with as many as 15% of U.S. Among children aged 5 to 14, sports and bicycle accidents cause the greatest number of concussions.

The leading causes of MTBI in adults are falls and vehicle accidents, and other causes include sports injuries, assaults, industrial and work-related injuries, and injuries that occur in the home. It's easy! Click here to learn about editing. Please help WikiDoc by adding more content here. Risk calculators and risk factors for Concussion causesĮditor-In-Chief: C. Natural History, Complications and PrognosisĪmerican Roentgen Ray Society Images of Concussion causesĪll Images X-rays Echo & Ultrasound CT Images MRIĭirections to Hospitals Treating Concussion Differentiating Concussion from other Diseases

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