A rodent enclosure dimensioned in length, width and height so as to allow a rodent to run freely along the length of the enclosure, but not turn around without standing on its hind legs The enclosure has a floor with bars extending transversely to allow access for a force sensor's probe from below. A force measurement device for use with the rodent enclosure to measure the tactile response of a rodent comprising a measurement probe connected to a device body. The probe has a tip which can be engaged with a rodent's paw through the floor of the enclosure The device body has a fixed body part and a rotatable body part arranged to allow relative rotation between them A rotation sensor detects the relative rotation and outputs a measurement parameter having values that are calibrated against force values associated with forces applied to the probe's tip
