The development of convulsive seizures in the grasshopper mouse (Onychomys torridus).

Open-field tests were administered to 29 male and 50 female southern grasshopper mice (Onychomys torridus) at 10-day intervals from 30-100 days of age. Convulsive seizures were observed to occur in 9 males and 23 females during at least 1 of the open-field tests. No significant differences appeared in the seizure characteristics of male and female subjects. The potential of O. torridus as an animal model of human epilepsy is discussed.