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. Author manuscript; available in PMC: 2008 Jul 22.
Published in final edited form as: Drug Dev Res. 2007;68(7):469–475. doi: 10.1002/ddr.20216

Fig. 1.

Fig. 1

BOLD responses to black-white gratings with a spatial frequency of 0.3 to 9 cycles per degree (cpd) in MwA patients (M) and non-headache controls (N). *P<0.02; **P<0.005. (Reprinted from Huang et al., 2003, with permission from Wiley-Blackwell.)