With digital timer for determining Neuro – Pixicity, muscle tone, balance and motor co-ordination in rats and mice. Consisting of two out three or four compartment of 75mm width each with a rotating rod of 25mm diameter having speeds of 5,10, 15,20 R.P.M. with time interval counters in each compartments. Models type size: B. Fitted with digital timer & digital rpm controller instead of manual rpm controller, rpm range 5 rpm to 25 rpm, rpm accuracy +- 3 rpm fitted with D.C. motor: