PSY260H1 Chapter Notes - Chapter 4: Inferior Olivary Nucleus, Pontine Nuclei, Eyeblink Conditioning
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Thompson realized that by removing / lesioning the cerebellum, rabbits no longer showed classical condition of new and old learning. Adapted from the diagram in gluck, mercado + myers textbook. 2 places where both cs & us converge: purkinje cells, interpositus nucleus. Interpositus nucleus firing matches eyeblink behaviour: presence of eyeblink = neuron firing. Purkinje cells are always firing (at random) but well-trained animals have periods where they aren"t firing: corresponds with airpuff us, because purkinje inhibit interpositus nucleus. 1. 3 brain stimulation as a substitute for behavioural training. If you stimulate the inferior olive (associated with airpuff us) paired with pontine nuclei (specific to a tone cs: you can actually elicit classical conditioning behaviour where the ur/ cr (eyeblink) is exactly like a trained rabbit. Interpositus: formation & executing response: you remove it, you remove all classical conditioning ability. Cerebellar cortex: response timing: severely impairs but does not eliminate eyeblink conditioning.
