CS-specific modifications of auditory evoked potentials in the behaviorally conditioned ratстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 13 сентября 2017 г.
Аннотация:The current report provides a detailed analysis of the changes in the first two components of the auditory
evoked potential (AEP) that accompany associative learning. AEPs were recorded from the primary auditory
cortex before and after training sessions. Experimental subjects underwent one (n = 5) or two (n = 7)
days of conditioning in which a tone, serving as a conditioned stimulus (CS), was paired with mild foot
shock. Control subjects received one (n = 5) or two (n = 7) days of exposure to the same stimuli delivered
randomly. Only animals receiving paired CS-US training developed a conditioned tachycardia response to
the tone. Our analyses demonstrated that both early components of the AEP recorded from the granular
layer of the cortex undergo CS-specific associative changes: (1) the first, negative component (occurring
21 ms following tone onset) was significantly augmented after one and two days of training while
maintaining its latency, and (2) the second, positive component (occurring 50 ms following tone onset)
was augmented after two days of training, and showed a significant reduction in latency after one and
two days of training. We view these changes as evidence of increased cortical synchronization, thereby
lending new insight into the temporal dynamics of neural network activity related to auditory learning.