SUMMARY Two hundred and thirty-seven Nigerians with missile head injury were treated at the University College Hospital (UCH) lbadan, between July 1964 and January 1970. Among the 165 of these patients who have been followed up for over a year, the incidence of epilepsy has been 11-4 %, 18-75%, and 333 % in a follow-up period ranging between one to two years, two to three years, and three to five years respectively.Wounds in the parietal region, especially those at the vertex, were followed by epilepsy more frequently than injuries elsewhere on the head. Of these wounds, tangential skull injuries and through-and-through brain injuries were more epileptogenic than others.Fits which occurred within a fortnight of wounding have been designated as 'early' fits, and they appeared to differ in their aetiology from 'late' fits.The phenomenon of epilepsy occurring after injuries to the head must have been observed in the prehistoric era when man first clubbed man, but the earliest documented reference to the problem of post-traumatic epilepsy is credited by common consent to Hippocrates. He recorded right-sided convulsive seizures which followed injury to the left cerebral hemisphere, a contribution which kindled interest in the surgical aspects of traumatic epilepsy on which a vast amount of literature had accumulated by the middle of the sixteenth century (Davis, 1953). In later years, the wars in America, Europe, and Korea provided material for the study of epilepsy after missile wounds of the head. The type of injuries studied, the period after wounding selected for these studies, and the duration of observation varied from series to series so that the frequency of post-traumatic epilepsy in missile head wounds had been variously estimated by different observers. It was recorded at 137 % during the American Civil War and at 4-3 % during the FrancoPrussian war (Turner, 1923). Among the British soldiers with missile wounds of the head during the first world war, Sargent (1921) reported an incidence of 4-5%, Rawling (1922) 25%, Wagstaffe (1928) 9-8%, Stevenson (1931) 1-5%, Ascroft (1941) 34%, Denny-Brown (1942) 8A4%;and Credner (1930) documented an incidence of 38% among Germans with war head injuries. In a five-year follow-up of 820 brain-wounded patients from the second world war, Russell and Whitty (1952)