Abstract
Objective To study the involvement of the anterior thalamic nuclei (ANT) in the cognitive processes. Methods We recorded the event-related potentials (ERPs) by visual and auditory memory encoding-recognition tasks by intracerebral recordings in patients with pharmacoresistent epilepsy who underwent the deep brain stimulation (DBS) surgery of the anterior thalamic nuclei with depth electrodes implanted bilaterally in the ANT. We compared the results with epilepsy-surgery candidates with depth electrodes implanted bilaterally in the hippocampus. Results In the ANT we recorded ERPs during the visual encoding and visual and auditory recognition tasks. No significant ERPs were recorded during the encoding phase by auditory stimuli in ANT. In hippocampus ERPs were recorded by visual and auditory memory encoding and recognition tasks. In the recognition tasks (visual and auditory) the ERPs in ANT preceded the ERPs in hippocampus. Conclusions ERPs are elicited by visual memory encoding and recognition, as well as by auditory recognition memory processes, but not by encoding auditory memory processing in the ANT. The ANT precedes the hippocampus in the memory recognition pathway. Key message ANT has a specific role in the memory processes, especially the memory recognition.
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