“…This has been reported in the literature to occur in some cases of manipulation of the cervical spine involving repeated, extreme extension andlor rotation movements of the head and neck (Beatty, 1977;Bladin and Merory, 1975;Bolton et al, 1989;Braun et al, 1983;Dadsetan and Skerhut, 1990;Danek, 1992;Easton and Sherman, 1977;Fast et al, 1987;Frisoni and Anzola, 1991;Frumkin and Baloh, 1990;Krueger and Okazaki, 1980;Lyness and Wagman, 1974;Okawara and Nibbelink, 1974;Parkin et al, 1978;Schellhas et al, 1980;Shimizu et al, 1988;Terrett, 1987;Thiel, 1991;Yang et al, 1992).…”