Paroxysms of cough followed by inspiratory whoop and vomiting suggests pertussis. The inter-ictal EEG shows occipital paroxysms, often demonstrating fixation-off sensitivity. EEG showed occipital paroxysms and MRI was normal. Alwyn H. Gentry objected strenuously and warned against "succumbing to further paroxysms of unwarranted splitting". Her EEGs showed occipital paroxysms, but this normalized by the age of 10 years. The paroxysms would abate after a few minutes of the victim inhaling the mixture. Heath was experimenting in 1953 on inducing paroxysms (orgasms) onto human brains.