title: Periaqueductal grey projection to the ventrobasal complex in the cat: an horseradish peroxidase study.
abstract: Horseradish peroxidase (HRP) was injected within the thalamic ventrobasal complex of 14 cats. The aim was to ascertain whether the periaqueductal grey matter (PAG) sends fibres to this complex. Retrogradely labelled cells were found within the PAG following HRP delivery either in the nucleus ventralis posterolateralis (VPL) or ventralis posteromedialis (VPM). PAG-VPL projection is only ipsilateral and arises mainly from lateral PAG, PAG-VPM projection is bilateral and originates from latero-ventral regions of the central grey. The hypothesis that PAG might control the activity of ventrobasal nociceptive neurones is proposed.
mesh_terms: D000344:Afferent Pathways / Q000033:anatomy & histology; D000818:Animals; D001370:Axonal Transport; D001921:Brain / Q000033:anatomy & histology*; D002415:Cats; D006735:Horseradish Peroxidase; D009474:Neurons / Q000502:physiology; D013788:Thalamus / Q000033:anatomy & histology
chemical_list: D006735:Horseradish Peroxidase