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  • Title: [The relation between amygdaloid nucleus in rats and pain modulation].
    Author: Lv N, Sun MZ, Xu MY, Zhang JY, Cui HB.
    Journal: Zhongguo Ying Yong Sheng Li Xue Za Zhi; 2003 Aug; 19(3):265-8. PubMed ID: 21189595.
    Abstract:
    AIM: To research the influence of noxious stimuli on the electric activities of pain-related neurons in several subnuclei of Amygdaloid Nucleus in rats. METHODS: Trains of the electric impulses applied to the sciatic nerve were used as noxious stimuli. The discharges of neurons were channeled off by glass microelectrode. RESULTS: Pain-related neurons existed in several subnuclei of Amygdaloid Nucleus. When the noxious stimuli were administered the frequency of discharges of pain-excited neurons (PEN) was increased while the frequency of pain-inhibited neurons (PIN) was decreased to the lowest level. The electric activities of PEN and PIN were matched with each other. Intraperitoneal injection of morphine (10 mg/kg) antagonized the effects of noxious stimuli on the pain-related neurons. CONCLUSION: Several subnuclei of Amygdaloid Nucleus play an essential role in perceiving, integrating and transmitting the pain impulses. They are a part of the central nervous system in which pain information is controlled and managed.
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