Superior cerebellar peduncle lesions selectively abolish the ipsilateral classically conditioned nictitating membrane/eyelid response of the rabbit

Unilateral lesions of the ipsilateral superior cerebellar peduncle as it leaves the body of the cerebellum to enter the brainstem were found to abolish or severely impair a previously conditioned nictitating membrane (NM)/eyelid response without effecting the unconditioned response or conditioning of the contralateral NM/eyelid.