Amygdaloid unit activity during classical conditioning of the nictitating membrane response in rabbit

摘要: Single and multiple unit activity was recorded from the amygdaloid nuclei in awake unanesthestized rabbits during classical conditioning of nictitating membrane (NM) response. Over half o recordings complex demonstrated changes firing rate following presentation tone conditioned stimulus (CS) or corneal air-puff unconditioned (US). Of records that were responsive to training stimuli, 58% showed responses CS 73% US. Amygdaloid either US tended be a long latency (greater than 70 msec), duration 250 modest increase (less 2 fold) firing. There no statistically significant differences between spontaneous rates, response latencies, magnitudes, type distributions seen unpaired (control) paired presentations. However, four 18 single groups tested both developed new enhanced onset training. All these basolateral lateral nuclei. Although few did develop alterations after CS-US pairing, majority indicated essentially same patterns occur as it is therefore unlikely critical neuronal underlying NM within complex. Other possible roles for are considered.