Description: Segment 1 Crow discusses the theories of philosopher Jeremy Bentham which leads him into an introduction to his lecture on the neurological basis of reward. A short film is shown in which a rat, with electrodes implanted in its brain is shown to receive a reward when it presses a lever. Crow explains how this works, using a diagram of the rat's brain. He then talks about drugs which have an effect on the neuronal reward mechanisms. Time start: 00:00:00:00 Time end: 00:05:47:00 Length: 00:05:47:00 Segment 2 Crow talks about the Falck-Hillarp technique which studies reward systems in the rat's brain. Further diagrams show sections through the brain to reveal the dopamine neurones. Time start: 00:05:47:00 Time end: 00:10:21:00 Length: 00:04:34:00 Segment 3 Crow continues to look at cross sections of the brain in diagrams. He then discusses an experiment on electrically stimulated rats, comparing levels of noradrenaline. Time start: 00:10:21:00 Time end: 00:16:05:00 Length: 00:05:54:00 Segment 4 A further film clip is shown of a rat with electrodes implanted in its brain, again, stimulating reward when it presses a lever. The rat has electrodes first in its dopamine centres, then in the locus coeruleus. Time start: 00:16:05:00 Time end: 00:21:19:00 Length: 00:05:14:00