A method, system and apparatus for detecting a disorder of the central nervous system, comprises: recording an EMG from muscle groups on left and right hands of patient separating a gesture writing action into time intervals of postural and writing activity recording EMG activity from the same muscle groups during a resting time period determining a plurality of indicators, comprising: identifying tremor peaks in EMG spectral density determining muscle tone like stiffness from EMG spectral density determining muscle weakness from EMG intensities determining patterns of correlation waves determining a delay from when a subject started writing after hearing an audio signal determining the time of writing activity, when a pen is touching a tablet determining the heights and shapes of characters from pen traces on a tablet and assigning a point value to every indicator and calculating a combined score based on the point values.
