Effect of noxious somesthetic stimulation on the activity of neurons of the nucleus centralis of the amygdala.

摘要: Neurons (n = 107) were recorded, in anaesthetized rats, with extracellular micropipettes, the nucleus centralis of amygdala (Ce). The activity a large majority (77%) was exclusively or preferentially affected by noxious stimuli applied any area body. rest neurons not activated (21%) responded only to innocuous (2%). nociceptive classified into two groups: first group (34% whole population) mechanical and thermal stimuli; second (43% inhibited stimuli. groups precisely encoded range. Transcutaneous electrical stimulation suggested that Ce under influence A delta C fibers. These results demonstrate important input which according previous studies probably relays pontine parabrachial nucleus. In addition, they are good agreement involvement emotional, autonomic and/or behavioral reactions events.