4。接受脑干网状结构上行 Nonspecific 激动系统冲动,使动物 projections 保持觉醒状态。切断此 通路,引起动物昏睡。 Thalamus Specific projections enso collateral axons Ascending Brainstem sensory reticular projections formation FIGURE 7. 4 The brainstem reticular formation ana retic ular activating system. Ascending sensory tracts send axon collateral fibers to the reticular formation These give rise to fibers synapsing in the intralaminar nuclei of the thala mus. From there, these nonspecific thalamic projections influence widespread areas of the cerebral cortex and limbic system4。接受脑干网状结构上行 激动系统冲动，使动物 保持觉醒状态。切断此 通路，引起动物昏睡