Figure 3.

Partial correlation between cerebral blood flow (CBF) values within the primary somatosensory cortex and clinically reported headache characteristics (controlling for global CBF). Clinical variables include (from left to right) migraine frequency (per month), number of cutaneous allodynia (CA) symptoms, duration of migraine (years), and age of the patients (years). Note that the right primary somatosensory cortex was positively correlated with migraine attack frequency. [Color figure can be viewed at http://wileyonlinelibrary.com]