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Fig. 2 | BioMedical Engineering OnLine

Fig. 2

From: Impacts of stimulus parameters and configurations on motor cortex direct electrical stimulation using intrinsic optical imaging: a pilot study

Fig. 2

Effects of current intensity modulation. (A) Typical optical responses to bipolar (top line) and monopolar (bottom line) stimulations with different current intensities. Vessel maps obtained with green light were shown on the far left. Significant changing areas were labeled with red lines. A: anterior; L: lateral. (B) Maximum reflectance changes to current intensity changes among all rats imaged. The cortical responses showed a near-linear relationship with amplitude changes. The black line with gray shadows indicates the calculated changing ratios of monopolar to bipolar stimulations. (C) Calculated changing area ratios of momopolar to bipolar stimulations. The pixels of the areas having more than 3‰, 5‰, 7‰ reflectance changes were calculated respectively

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