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. Author manuscript; available in PMC: 2010 Feb 10.
Published in final edited form as: Neuroimage. 2007 Nov 22;39(4):1510. doi: 10.1016/j.neuroimage.2007.11.015

Fig. 3.

Fig. 3

BOLD and CBF changes in the visual cortex (VC) compared to lentiform nuclei (LN) of the basal ganglia for both hypercapnia and functional activation. The panels show average response curves and standard deviations (13 subjects) for the LN and VC ROIs based on CBF activated voxels. (A) CBF responses to hypercapnia, (B) BOLD responses to hypercapnia, (C) CBF responses to activation, and (D) BOLD responses to activation. The overall larger response in VC compared to LN may reflect differences in effective amplitude of the separate visual and motor stimuli driving the two regions, but the relative response amplitudes reflect differences in the coupling of CBF and CMRO2 changes between the two regions. The solid black lines indicate stimulus presentation.