Aversive Conditioning and Learning by Robert Brush

By Robert Brush

"very little fabric of this sort used to be released"

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Furthermore, the heart rate change to the CS occurred only when direct sympathetic stimulation had an effect. This result is consistent with the view that the conditioned heart rate increase is a sympathetically controlled response. These data support the hypothesis that difficulties in performing an operantly conditioned heart rate response under deep curarization could stem from the blocking action of curare on peripheral autonomie synapses and not from the prevention of skeletal responding. Operantly conditioned heart rate responses do occur independently of overt movement, and these responses would probably be seen stably in all dogs if Ί η the dogs described in the text, the peripheral autonomie nerves were not cut.

Therefore, the contrast is between events which occur just after the CS and those which do not. It is obvious, however, that as the time interval between the CS and US increases, there is no a priori method for determining when the US stops occurring after the CS and begins to take place in the non-CS period. 1. Autonomie Avetsive Conditioning 51 (Pr(US/CS)). This can be considered a more general form of Lashley's position and will be called the dependency position. This position is contrasted with the contiguity view which states that the essential condition for classical conditioning is the pairing of CS and US in temporal contiguity (called the "pairings" position by Rescorla).

1. Autonomie Aversive Conditioning 41 Recently DiCara and Miller (1968e,f) and DiCara and Weiss (1968) have studied the correlation between heart rate and skeletal responding in rats using a somewhat different approach. that employed in the paper described earlier (DiCara and Miller, 1968b). After the rats recovered from curarization, the appropriate CS was presented and measurements were made during the intertriai interval of heart rate, skeletal activity and respiration. In the normal state, there was no difference in heart rate between the groups trained to increase and decrease heart rate just before CS presentations began.

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