A mouse was placed on a stainless bar (50 cm length, 2 mm diameter, elevated up to 37 cm from a surface) at a point midway between the supports and observed for 30 sec in four separate trials. The amount of time spent hanging was recorded and scored according to the following system [41]: 0, fell off; 1, hung onto the bar with two forepaws; 2, in addition to 1, attempted to climb onto the bar; 3, hung onto the bar with two forepaws and one or both hind paws; 4, hung onto the bar with all four paws with tail wrapped around the bar; 5, escaped to one of the supports.