NEUR30003 Lecture Notes - Lecture 26: Basal Forebrain, Medial Dorsal Nucleus, Substantia Nigra
* note: pain and fear are both highly motivational states. * all emotional states are associated with several different things. One is that it feels like something that is very recognisable, there is a conscious experience e. g. pain feels like pain, fear feel like fear, pleasure feels like pleasure. Another thing is that there is a somatic activation e. g. certain facial e(cid:454)pressio(cid:374) asso(cid:272)iated (cid:449)ith e(cid:454)perie(cid:374)(cid:272)i(cid:374)g (cid:272)ertai(cid:374) e(cid:373)otio(cid:374)s, a(cid:374)d there"s also u(cid:374)(cid:272)o(cid:374)s(cid:272)ious auto(cid:374)o(cid:373)i(cid:272) activations (particularly so with fear). * motivated behaviour: the propensity to do things because we like doing them, because it gives us some sort of pleasure. * much about the brain mechanisms of reward and motivation has come from the study of additive hedonic drugs. * if we come across things like opium poppies and we extract the alkaloids out of it and we ingest them, it does something to the brain.