1. A nerve mapping and monitoring system comprising: a. a multi-polar stimulation unit; b. an electrical connector having a first end and a second end, wherein the first end is coupled with the multi-polar simulation unit; c. an instrument having a grid array, wherein the grid array comprises a plurality of electrodes, wherein each of the plurality of electrodes is configured to be stimulated by the multi-polar stimulation unit; d. a recording element, wherein the recording element is configured to detect a muscle response elicited by the grid array; and e. a computer system, wherein the computer system is configured to monitor the muscle response elicited by the grid array such that neural structures can be identified and avoided.