The lateral cervical nucleus in the cat: anatomic organization of cervicothalamic neurons.

摘要: The morphology of the lateral cervical nucleus (LCN) and organization cervicothalamic projection neurons were studied in cats which had received thalamic injections horseradish peroxidase (HRP). boundaries LCN defined following very large (HRP injections. Roughly 92-97% cells project contralaterally to thalamus; an additional 1.5% ipsillaterally. Computer-assisted measurements perikaryal areas demonstrated that there are two sizes cells, (175-900 micrometer 2) small (less than 175 2); localized medial third LCN. not labeled after HRP predomininantly small, medially-located neurons. Small into physiologically identified regions ventroposterior thalamus organized a topography consistent with observed (Craig Tapper, '78). Dorsolateral retrogradely from ventroposterolateralis, pars lateralis (VPL1), ventromedial medialis (VPL m), few ventroposteromedialis (VPM). A portion also each part thalamus. Some interspersion was even cases most well-restricted labeling. We conclude maintains basic somatotographic inherent variability, certain aspects consistently demonstrable both anatomically. Evidence obtained suggestive rostrocaudal inversion projection. projection, differentiation subpopulation, possible redefinition discussed light these results.