Brink E E, Jinnai K, Hirai N, Wilson V J
Brain Res. 1981 Jul 27;217(1):13-21. doi: 10.1016/0006-8993(81)90181-5.
Extracellular responses of vestibulospinal neurons projecting to neck segments (vestibulocollic neurons) to stimulation of cervical afferents were studied in decerebellate cats anesthetized with chloralose or decerebrated intercollicularly. These neurons were antidromically activated by microstimulation in the C2 ventral horn ipsilateral or contralateral to the vestibular nuclei. Contralateral neck afferents produce in vestibulocollic neurons the same responses they produce in other vestibulo-spinal neurons, although the response (early excitation, inhibition) which predominates varies with type of preparation. In intercollicular decerebrate cats, the main effect of stimulating the contralateral C2 ganglion was inhibition (latency greater than or equal to 6 msec), often followed by late excitation. Early excitation, at a latency less than 6 msec, was rarely seen, although it occurred in half the vestibulospinal neurons projecting to the cervical enlargement. In contrast to the results in decerebrate cats, stimulation of the contralateral C2 ganglion produced early excitation in over one-third of the vestibulocollic neurons studied in chloralose-anesthetized cats. Results on vestibulocollic neurons were similar whether the cells projected ipsilaterally or contralaterally, or whether or not the cells also projected to the cervical enlargement (branching neurons). The influence of cervical afferents on vestibulocollic neurons demonstrates supraspinal paths by which cervical afferents may act upon the neck and might modify vestibular reflexes of the neck.
在使用水合氯醛麻醉的去小脑猫或间脑间离断的去大脑猫中，研究了投射至颈部节段的前庭脊髓神经元（前庭颈神经元）对颈传入神经刺激的细胞外反应。通过在前庭核同侧或对侧的C2腹角进行微刺激，可逆向激活这些神经元。对侧颈传入神经在前庭颈神经元中产生的反应，与它们在其他前庭脊髓神经元中产生的反应相同，尽管占主导的反应（早期兴奋、抑制）会因制备类型而异。在间脑间离断的去大脑猫中，刺激对侧C2神经节的主要效应是抑制（潜伏期大于或等于6毫秒），随后常伴有晚期兴奋。潜伏期小于6毫秒的早期兴奋很少见，尽管它出现在投射至颈膨大的前庭脊髓神经元中的一半。与去大脑猫的结果相反，在水合氯醛麻醉的猫中，刺激对侧C2神经节在超过三分之一的所研究的前庭颈神经元中产生了早期兴奋。无论细胞是同侧投射还是对侧投射，或者细胞是否也投射至颈膨大（分支神经元），前庭颈神经元的结果都是相似的。颈传入神经对前庭颈神经元的影响表明了颈传入神经可能作用于颈部并可能改变颈部前庭反射的脊髓上通路。
