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. 2007 Nov 30;4:46. doi: 10.1186/1743-0003-4-46

Figure 13.

Figure 13

Reciprocity. A resistor network where a current source is introduced in the brain and the a potential difference is measured at an electrode pair, and visa versa: (a) a current source Irx MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacPC6xNi=xH8viVGI8Gi=hEeeu0xXdbba9frFj0xb9qqpG0dXdb9aspeI8k8fiI+fsY=rqGqVepae9pg0db9vqaiVgFr0xfr=xfr=xc9adbaqaaeGacaGaaiaabeqaaeqabiWaaaGcbaGaemysaK0aaSbaaSqaaiabdkhaYnaaBaaameaacqWG4baEaeqaaaWcbeaaaaa@3038@ is introduced and the potential UAB is measured, and (b) a current source IAB is introduced and a potential Vrx MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacPC6xNi=xH8viVGI8Gi=hEeeu0xXdbba9frFj0xb9qqpG0dXdb9aspeI8k8fiI+fsY=rqGqVepae9pg0db9vqaiVgFr0xfr=xfr=xc9adbaqaaeGacaGaaiaabeqaaeqabiWaaaGcbaGaemOvay1aaSbaaSqaaiabdkhaYnaaBaaameaacqWG4baEaeqaaaWcbeaaaaa@3052@ is measured.