The cholinergic system modulates negative BOLD responses in the prefrontal cortex once electrical perforant pathway stimulation triggers neuronal afterdischarges in the hippocampus
| Autor: | Alberto Arboit, Frank Angenstein, Karla Krautwald |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Male
blood supply [Perforant Pathway] pharmacology [Pilocarpine] pharmacology [Muscarinic Agonists] Hippocampus pharmacology [Scopolamine] Stimulation metabolism [Hippocampus] pharmacology [Muscarinic Antagonists] blood supply [Hippocampus] Prefrontal cortex Neurons Cerebral blood volume (CBV) Perforant Pathway Pilocarpine blood supply [Prefrontal Cortex] Neurology metabolism [Neurons] Cerebrovascular Circulation Cholinergic system negative BOLD response Cardiology and Cardiovascular Medicine electrophysiology scopolamine pilocarpine medicine.drug Scopolamine metabolism [Prefrontal Cortex] Prefrontal Cortex Hyperemia Muscarinic Antagonists Muscarinic Agonists Right hippocampus medicine Animals ddc:610 Rats Wistar metabolism [Perforant Pathway] business.industry metabolism [Hyperemia] Original Articles Rats Electrophysiology nervous system Neurology (clinical) business Neuroscience |
| Zdroj: | Journal of cerebral blood flow & metabolism 42(2), 364-380 (2022). doi:10.1177/0271678X211049820 Journal of cerebral blood flow & metabolism, 42(2):364-380 Journal of Cerebral Blood Flow & Metabolism |
| DOI: | 10.1177/0271678X211049820 |
| Popis: | Repeated high-frequency pulse-burst stimulations of the rat perforant pathway elicited positive BOLD responses in the right hippocampus, septum and prefrontal cortex. However, when the first stimulation period also triggered neuronal afterdischarges in the hippocampus, then a delayed negative BOLD response in the prefrontal cortex was generated. While neuronal activity and cerebral blood volume (CBV) increased in the hippocampus during the period of hippocampal neuronal afterdischarges (h-nAD), CBV decreased in the prefrontal cortex, although neuronal activity did not decrease. Only after termination of h-nAD did CBV in the prefrontal cortex increase again. Thus, h-nAD triggered neuronal activity in the prefrontal cortex that counteracted the usual neuronal activity-related functional hyperemia. This process was significantly enhanced by pilocarpine, a mACh receptor agonist, and completely blocked when pilocarpine was co-administered with scopolamine, a mACh receptor antagonist. Scopolamine did not prevent the formation of the negative BOLD response, thus mACh receptors modulate the strength of the negative BOLD response. |
| Databáze: | OpenAIRE |
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