Three times as many lamina I neurons project to the periaqueductal gray than to the thalamus: a retrograde tracing study in the cat
Section snippets
Acknowledgements
The authors thank Mr. K. van Linschoten, Mr. M. Platteel and Mrs. E. Meyer for their histotechnical help and Professor Dr. G.N. van Vark for his advice about statistics.
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2022, NeuronCitation Excerpt :The next question is how primary sensory information is relayed to Tac1+ neurons. We used rabies-virus-mediated retrograde tracing to label inputs of Tac1+ neurons (Cui et al., 2017), as shown in Figure S5I. Labeled pre-synaptic cells were observed in the spinal trigeminal nucleus (Sp5), the gracile nucleus (Gr), and the cuneate nucleus (Cu) (Figures 3B, S5J, and S5K), areas shown to relay sensory information from the trigeminal ganglia and spinal cord to central brain regions (Abraira and Ginty, 2013; Erzurumlu et al., 2010), consistent with previous reports (Barbaresi and Mensà, 2016; Choi et al., 2020; Keay et al., 1997; Mantyh, 1982; Mouton and Holstege, 1998; Wiberg et al., 1987). These results provide anatomical evidence that l/vlPAG Tac1+ neurons relay somatosensory information from the periphery.
5.11 - Ascending Pathways: Anatomy and Physiology
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