Abstract
The present study determined that a population "nonclassical" sympathetic neurons in cats spinal cord contains catecholamines. They are localized in the central, dorsomedial, and lateral regions of the ventral horn of T1-T5 segments of the spinal cord. Electrophysiological study indicated that axonal conduction velocity is 7.3 +/- 0.5 m/s (ranging from 3.6 to 17.2 m/s). Possible functional roles of catecholamine-containing neurons of spinal cord include involvement in sympathetic control of cardiac cycle duration.
MeSH terms
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Adrenergic beta-Antagonists / pharmacology
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Animals
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Atropine / pharmacology
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Axons / drug effects
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Axons / physiology
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Catecholamines / physiology*
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Cats
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Electric Stimulation
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Ganglionic Blockers / pharmacology
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Heart / drug effects
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Heart / innervation*
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Neurons / drug effects
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Neurons / physiology*
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Propanolamines / pharmacology
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Quaternary Ammonium Compounds / pharmacology
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Spinal Cord / drug effects
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Spinal Cord / physiology*
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Sympathetic Nervous System / drug effects
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Sympathetic Nervous System / physiology*
Substances
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Adrenergic beta-Antagonists
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Catecholamines
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Ganglionic Blockers
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Propanolamines
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Quaternary Ammonium Compounds
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talinolol
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pentamine
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Atropine