ERIC Number: EJ818779
Record Type: Journal
Publication Date: 2008-Nov
Abstractor: As Provided
Reference Count: 0
Ontogenetic Change in the Auditory Conditioned Stimulus Pathway for Eyeblink Conditioning
Freeman, John H.; Campolattaro, Matthew M.
Learning & Memory, v15 n11 p823-828 Nov 2008
Two experiments examined the neural mechanisms underlying the ontogenetic emergence of auditory eyeblink conditioning. Previous studies found that the medial auditory thalamus is necessary for eyeblink conditioning with an auditory conditioned stimulus (CS) in adult rats. In experiment 1, stimulation of the medial auditory thalamus was used as a CS in rat pups trained on postnatal days (P) 17-18, 24-25, or 31-32. All three age groups showed significant acquisition relative to unpaired controls. However, there was an age-related increase in the rate of conditioning. Experiment 2 examined the effect of inactivating the medial auditory thalamus with muscimol on auditory eyeblink conditioning in rats trained on P17-18, 24-25, or 31-32. Rat pups trained on P24-25 and P31-32, but not P17-18, showed a significant reduction in conditioned responses following muscimol infusions. The findings suggest that the thalamic contribution to auditory eyeblink conditioning continues to develop through the first postnatal month.
Descriptors: Animals, Auditory Stimuli, Conditioning, Children, Eye Movements, Experiments, Cognitive Processes
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A