File:Experimental-H-type-and-L-type-bovine-spongiform-encephalopathy-in-cattle-observation-of-two-1746-6148-8-22-S2.ogv

English: L-type BSE (L1) L-type BSE-inoculated steer at 17 mpi (prior to cull), 'nervous form'. This steer displays head shyness in the crush (head shaking or tossing when observed from the front) and over-reactivity to testing of the menace response and touching of the head and upper neck with artery forceps. It refuses to walk towards the end of the corridor ('freezes') on its own but runs with hypermetric hind limb movements in this direction when other cattle are led out. It has considerable difficulty in rising (animal marked by arrow) with dragging its body along the floor of the pen (rising score 2).