Patent ID: 7283877

Claim:
A method of recording and processing neural response (NR), the method comprising: (a) providing a stimulating electrode, E 1 , and a stimulating electrode, E 2 , and a recording electrode ER; (b) recording RC, in response to a combination of a first, sub-threshold stimulus pulse, S 1 at E 1 , having amplitude A and a second, sub-threshold stimulus pulse, S 2 at E 2 , having amplitude B, wherein S 1 and S 2 are applied simultaneously and, when added together, provide a supra-threshold stimulus amplitude C; (c) recording R 1 , in response to a sub-threshold stimulus pulse, S 1 delivered through electrode E 1 ; (d) recording R 2 , in response to a sub-threshold stimulus pulse, S 2 delivered through electrode E 2 ; (e) recording R 0 , in response to no stimulation at any stimulating electrodes; and (f) processing the recordings to yield an estimated NR in accordance with the relation: NR=RC−(R 1 +R 2 )+R 0 , wherein the steps (b), (c), (d) and (e) may be performed in any order.