In this paradigm, flies are exposed to an odor together with an unconditioned stimulus (US) of either an electric shock punishment or a sugar reward, and then to another odor without the US.
Huxley's tale, with its initial focus on Bernard's discontent and obsession with the lovely Lenina, their subsequent visit to and return from a "reservation" with an unconditioned "savage" in tow, and the final destruction of the free-thinking John by the future society, would seem to lend itself well to a three-act structure.
The degree of freezing displayed by the Reelin-treated AS mice compared with mock treated AS mice (F2,30 = 79.93, P < 0.0001) suggested that Reelin treatment restored the ability to associate a context with an unconditioned stimulus.
Hippocampal activity in extinction may be context-dependent (Kalisch et al., 2006), and the hippocampus may be specifically involved in the encoding of an association between a context, a conditioned stimulus (CS), and an unconditioned stimulus (US) (Alvarez et al., 2008; Lang et al., 2009).
In fear conditioning, a conditioned stimulus (CS) such as a tone and/or context is paired with an unconditioned stimulus (US), such as an electric shock that naturally generates a freezing response (i.e. fearful behavior).
More specifically, the idea of the "world" purports to be an idea of an unconditioned but somehow still sensible object (cf. A479/B509).
Therefore, we developed a pain-relevant fear conditioning paradigm using a movement as a conditioned stimulus (CS) and a painful electrocutaneous stimulus as an unconditioned stimulus (US) to examine the acquisition of fear of movement-related pain in healthy subjects.
Occasion setters are stimuli that signal that a conditioned stimulus (CS), that is otherwise without consequence, will be followed by an unconditioned stimulus (US); as a result the CS elicits a greater conditioned response (CR) when it is preceded by the occasion setter than when it is presented alone.
The read-out that is measured in contextual and cued fear conditioning is a freezing response that occurs following the pairing of an unconditioned stimulus (US), such as a foot shock, with a conditioned stimulus (CS), such as a particular context or cue (tone) [ 15- 17].
