Region- and Layer-Specific Activation of the Higher Order Auditory Cortex Te2 after Remote Retrieval of Fear or Appetitive Memories
| Autor: | Annamaria Renna, Marco Cambiaghi, Tiziana Sacco, Anna Grosso, Luisella Milano, Benedetto Sacchetti |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Male Fear memory Echoic memory Cognitive Neuroscience Conditioning Classical Wistar Appetite Auditory cortex 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine long-term memory Encoding (memory) Emotional memory Biological neural network Avoidance Learning Animals Rats Wistar Early Growth Response Protein 1 Auditory Cortex Long-term memory cortical circuits Fear emotional learning expression of immediate early genes Classical Rats 030104 developmental biology auditory cortex Acoustic Stimulation Mental Recall Psychology Immediate early gene Neuroscience 030217 neurology & neurosurgery Cognitive psychology Conditioning |
| Zdroj: | Cerebral cortex (New York, N.Y. : 1991). 27(6) |
| ISSN: | 1460-2199 |
| Popis: | The auditory cortex is involved in encoding sounds which have acquired an emotional-motivational charge. However, the neural circuitry engaged by emotional memory processes in the auditory cortex is poorly understood. In this study, we investigated the layers and regions that are recruited in the higher order auditory cortex Te2 by a tone previously paired to either fear or appetitive stimuli in rats. By tracking the protein coded by the immediate early gene zif268, we found that fear memory retrieval engages layers II-III in most regions of Te2. These results were neither due to an enhanced fear state nor to fear-evoked motor responses, as they were absent in animals retrieving an olfactory fear memory. These layers were also activated by appetitive auditory memory retrieval. Strikingly, layer IV was recruited by fear, but not appetitive memories, whereas layer V activity was related to the behavioral responses displayed to the CS. In addition to revealing the layers and regions that are recruited in the Te2 by either fear or appetitive remote memories, our study also shows that the neural circuitry within the Te2 that processes and stores emotional memories varies on the basis of the affective motivational charge of tones. |
| Databáze: | OpenAIRE |
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