Hernández-González M, Guevara M A, Cervantes M, Morali G, Corsi-Cabrera M
Instituto de Neurociencias, Universidad de Guadalajara, Jalisco, Mexico.
J Physiol Paris. 1998 Feb;92(1):43-50. doi: 10.1016/S0928-4257(98)80022-3.
The electrocorticogram (ECoG) from the prefrontal cortex was simultaneously recorded with the accelerometric signals of pelvic thrusting performed by male rats during sexual behavior. The changes in the prefrontal ECoG were precisely correlated in time with well defined elements of male rat copulation. Principal component analysis allowed to identify three distinct bands of frequencies in the frontal ECoG: the absolute power (AP) of the 4-16 Hz band was increased in the 500-ms periods before, during, and after the execution of pelvic thrusting in mount, intromission and ejaculation responses; the AP of the 18-24 Hz band was selectively increased during the execution of pelvic thrusting at the three copulatory responses, whereas the AP of the 26-32 Hz band was increased only during the pelvic moments of mount and intromission responses. These results show that the electroencephalographic activity of the prefrontal cortex of the male rat is related to the performance of sexual behavior, supporting the concept that this cortical area is involved in the organization of sequential behaviors, as sexual behavior.
在雄性大鼠性行为期间，同步记录前额叶皮质的脑皮质电图（ECoG）和骨盆推进行为的加速度信号。前额叶ECoG的变化在时间上与雄性大鼠交配的明确阶段精确相关。主成分分析能够识别前额叶ECoG中的三个不同频率带：在爬跨、插入和射精反应中骨盆推进执行前、期间和之后的500毫秒时间段内，4-16赫兹频段的绝对功率（AP）增加；在三种交配反应的骨盆推进执行期间，18-24赫兹频段的AP选择性增加，而26-32赫兹频段的AP仅在爬跨和插入反应的骨盆阶段增加。这些结果表明，雄性大鼠前额叶皮质的脑电图活动与性行为表现相关，支持了该皮质区域参与诸如性行为等顺序行为组织的概念。
