1.5.2 Probable migraine with aura

A retired accountant reports his fourth documented attack of a strange warning sensation, always on the left side of his head. He again struggles to characterise it beyond a mounting, energised quality, more of a positive symptom than any fading or numbness. He is adamant it was not visual, not tingling or numb, not affecting his speech, not causing any limb weakness, not restricted to a single eye, and not accompanied by vertigo, unsteadiness or double vision, so no brainstem-type features at all. On this occasion, as on the previous three, a headache developed within the hour of the sensation beginning. He remains on medication for hypertension and has never smoked; his younger brother has been treated for headaches in the past, though he is unsure of the details.