G. Triplett et al., INCIDENCE OF HEAD-INJURY - LASTING EFFECTS AMONG COLLEGE-STUDENTS ANDWORKING ADULTS IN THE GENERAL-POPULATION, Perceptual and motor skills, 83(3), 1996, pp. 1344-1346
224 (21%) of 1067 persons in a nonclinical population surveyed had one
or more head injuries resulting in unconsciousness. They had a total
of 306 head injuries with 113 (31%) of them resulting in lasting neuro
logical effects. Both in a pilot project and in the main study, headac
he mns the most commonly reported of an array of symptoms that are ess
entially a postconcussion syndrome.