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Two groups of corticofugal neurons identified with the pontine stimulation in the cat parietal association cortex: an intracellular HRP study
Authors:A. Samejima   T. Yamamoto   J. Ito  H. Oka  
Affiliation:1. Department of Physiology, Fukui Medical School, Fukui 910-11, Japan;2. Department of Otolaryngology, Faculty of Medicine, Kyoto University, Kyoto 606, Japan;1. Jiangsu Province Key Laboratory of Anesthesiology, NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs, Xuzhou Medical University, Xuzhou, China;2. Department of Anesthesiology, Liyang People''s Hospital, Jiangsu Province, Liyang, China;3. Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China;4. Department of Anesthesiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China;1. State Key Laboratory of Digital Medical Engineering, Southeast University, Nanjing, China;2. School of Biological Science & Medical Engineering, Southeast University, Nanjing, China;3. Institute of Sports and Health, Nanjing, China;1. Department of Anesthesiology, the Fourth Clinical School of Medicine, Zhejiang Chinese Medical University, Hangzhou 310006, China;2. Department of Anesthesiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China;3. Department of Anesthesiology, Zhejiang University School of Medicine, Hangzhou 310006, China;4. Department of Anesthesiology, Affiliated Hangzhou First People''s Hospital, Westlake University School of Medicine, Hangzhou 310006, China;5. Department of Anesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China;6. Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University, 606-8501, Japan
Abstract:
A classification of the parietal corticofugal neurons was performed in cats under Nembutal anesthesia. Eighty-eight neurons were identified with antidromic activation by the pontine stimulation. Thirteen neurons were furthermore identified with intracellular HRP staining. In these neurons, we found the close correlation between morphological features and conduction velocities. The faster conducting group of the neurons had relatively large somata, sparsely spinous apical dendrites, tap root basal dendrites and wide apical dendritic fields. The slower group had small somata and numerous dendritic spines.
Keywords:parietal cortex   corticofugal neuron   intracellular horseradish peroxidase (HRP) staining   conduction velocity   dendritic spine   cat
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