摘要
用HRP法研究了41只大鼠的前庭—丘脑投射。在丘脑腹前核(腹外侧核)、腹内侧核、中央外侧核、腹后核、丘脑后核、内侧膝状体大细胞部及外侧膝状体腹侧核等处分别注入HRP后,在前庭核簇的不同亚核中观察到标记细胞。证实了大鼠和猫及猴同样也有前庭—丘脑投射。并依前庭—丘脑投射的细胞起源和终止部位不同,可将前庭—丘脑投射大致分为两大类。第一类起自前庭核簇所有四个亚核,投射到丘脑的“非特异”核群,包括腹前核(可能还有腹外侧核),腹内侧核及中央外侧核,可能与维持并改变大脑皮层的兴奋性以及完成运动功能有关。第二类仅起自前庭内侧核和降核,投射到丘脑的腹后核及后核群(包括丘脑后核、内侧膝状体大细胞部及外侧膝状体腹侧核),可能和前庭感觉的传递以及前庭感觉和其它感觉的会聚有关。
Horseradish peroxidase(HRP)was injected in 41 rats to investigate thevestibulothalamic projections.Labelled neurons were observed in various subdivisionsof the vestibular nuclear complex following injections of the ventral anterior nucleus(VA),the ventral medial nucleus(VM),the central lateral nucleus(CL),the ventralposterior nucleus(VP),the nucleus posterior thalami(PO),the magnocellular partof the medial geniculate body(MGBmc),and the ventral nucleus of the lateralgeniculate body(LGV).From the present investigation it appears that generallyspeaking,there exist two distinct categories of vestibulothalamic projections withregard to origin as well as site of termination of the fibers.The first Category ofprojections appears to originate from all four vestibular nuclei(superior,lateral,medial,and descending)and terminate in the nonspecific thalamic nuclei includingVA,VM,and CL.It may be concerned with regulation of the general excitabilityof neurons in cortex and participation in motor performance.The second categoryof projections appears to originate only from the medial and descending vestibularnuclei and terminate in the ventral posterior nucleus and posterior group of thethalamus(including PO,MGBmc,and LGV).It may be associated with consciousvestibular perception and convergence of vestibular and somatic impulses.
作者
包新民
邝国陶
Bao Xinmin;Kuang Guotao(The Fourth Army Medical College)
出处
《解剖学报》
CAS
1983年第1期54-60,119,共8页
Acta Anatomica Sinica
