论文
论文标题：Blood pressure pulsations modulate central neuronal activity via mechanosensitive ion channels
作者：Luna Jammal Salameh, Sebastian H. Bitzenhofer, Ileana L. Hanganu-Opatz, Mathias Dutschmann, Veronica Egger
期刊：Science
发表时间：2024/02/02
数字识别码：10.1126/science.adk8511
摘要：The transmission of the heartbeat through the cerebral vascular system causes intracranial pressure pulsations. We discovered that arterial pressure pulsations can directly modulate central neuronal activity. In a semi-intact rat brain preparation, vascular pressure pulsations elicited correlated local field oscillations in the olfactory bulb mitral cell layer. These oscillations did not require synaptic transmission but reflected baroreceptive transduction in mitral cells. This transduction was mediated by a fast excitatory mechanosensitive ion channel and modulated neuronal spiking activity. In awake animals, the heartbeat entrained the activity of a subset of olfactory bulb neurons within ~20 milliseconds. Thus, we propose that this fast, intrinsic interoceptive mechanism can modulate perception—for example, during arousal—within the olfactory bulb and possibly across various other brain areas.
