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  • Title: Neural unit activity in the trigeminal complex with interpositus or red nucleus inactivation during classical eyeblink conditioning.
    Author: Clark RE, Lavond DG.
    Journal: Behav Neurosci; 1996 Feb; 110(1):13-21. PubMed ID: 8652062.
    Abstract:
    During classical conditioning, many neurons in the trigeminal complex of rabbits exhibit activity that is related to the conditioned stimulus (tone), the unconditioned stimulus (airpuff), or to the conditioned response (eyeblink). For these reasons the trigeminal complex has been hypothesized to be a brainstem locus for the neuronal plasticity associated with conditioning. In this experiment, the learning-related activity (unit activity associated with the conditioned response) in the trigeminal is abolished when either the red nucleus or interpositus nucleus of the cerebellum is temporarily inactivated by cooling, but the stimulus-evoked activity is unaffected by cooling. This study and previous results support the suggestion that the learning-related activity seen in the trigeminal is driven by the interpositus by way of the red nucleus.
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