“Mild” traumatic brain injuries can often cause
significant emotional, physical, and cognitive impairments. Associated outcomes can include depression,
post-concussion symptoms, disability, underemployment, low income, and marital
instability. Yet, mild traumatic brain
injuries often go undetected because of the inability of conventional imaging
tests to identify them.
According to the International Brain Injury
Association, few patients with mild traumatic brain injuries have visible
injuries such as fractures, contusions, and hemorrhages found in a head CT
scan.
There is still some debate about what defines a
mild traumatic brain injury. The most
widely accepted definition was set out by the American Congress of
Rehabilitation Medicine. It is a patient
“who has had a traumatically induced physiological disruption of brain
function, as manifested by at least one of the following:
1.
any
period of loss of consciousness;
2.
any
loss of memory for events immediately before or after the accident;
3.
any
alteration in mental state at the time of the accident (e.g., feeling dazed,
disoriented, or confused); and
4.
focal
neurological deficit(s) that may or may not be transient;
but where the severity of the injury
does not exceed the following:
·
loss
of consciousness approximately 30 minutes or less;
·
after
30 minutes, an initial Glasgow Coma Scale (GCS) of 13-15; and
·
post-traumatic
amnesia (PTA) not greater than 24 hours”.
Recent technological advancements have improved
our ability to detect mild traumatic brain injuries. These advancements include positron emission
tomography (PET), single photon emission computerized tomography (SPECT),
functional magnetic resonance imaging (fMRI) and diffuse tensor imaging (DTI).
Anyone who sustains a head injury should be
assessed by a medical professional with expertise in assessing traumatic brain
injuries. Early symptoms of a mild traumatic brain injury include headache,
vomiting, nausea, dizziness or vertigo, and problems with memory.
By Geoffrey Duckworth





