Migraine attack restores the response of vascular smooth muscle cells to nitric oxide but not to norepinephrine

Figure 3 Forearm blood flow response to infusion of norepinephrine at the rate of 280 μg/L per minute into the brachial artery in patients with migraine during or free from headache, and control subjects. The patients with migraine were studied during the interictal period (group M) or the headache attack (group MH). Data (mean ± SE) were analyzed by paired t test vs baseline and unpaired t test among groups. ^bP < 0.01 vs baseline; ^cP < 0.05 vs controls.