Patent Document ID: 4649482
Application ID: 06646613
Patent Flag: 1

Claim One:
1. An apparatus for displaying a topographical map of brain electrical acitivity of a patient, comprising: sensor means disposed on a patient's head for providing changeable amplitude sign input activity signals responsive to said brain electrical activity; processing means responsive to said changeable amplitude sign input activity signals for providing an amplified and digitized form of said input activity signals; means for providing a video output responsive to said amplified and digitized input activity signals, said video output incluidng a set of interpolated input activity signals for positions between the locations of said sensor means with said positions including selected locations along at least two interpolated lines generated between adjacent pairs of lines formed by connecting the locations of said sensor means and at least two of said interpolated lines between each said adjacent pairs of lines being generated from distinguishable appropriate combinations of said input activity signals, said interpolated input activity signals generated line--by--line and displayed while a next successive adjacent line for display is being generated; and means for displaying said topographical map of said brain electrical activity responsive to said video output.