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EnglishIn anaesthetized and paralyzed rabbits, electrical stimulation of the cervical sympathetic nerve at physiological frequencies induces in jaw muscle spindle afferents a short-latency decrease or suppression of discharge. This effect is very stereotyped in pattern and is attributed to direct sympathetic innervation of spindles. It is mediated by preganglionic S1-S2 sympathetic fiber groups. A longer-latency facilitatory effect follows, probably vasomotor in origin and mediated by S3-S4 groups. Both responses are eliminated by administration of alpha-adrenergic blocking agents. The latencies, patterns, thresholds, durations and reproducibility of these responses have been studied and the mechanisms possibly involved are discussed.
| Titolo: | A dual effect of sympathetic nerve stimulation on jaw muscle spindles. |
| Autori Riconosciuti: | |
| Autori: | PASSATORE M ;FILIPPI GM |
| Data di pubblicazione: | 1982 |
| Abstract: | In anaesthetized and paralyzed rabbits, electrical stimulation of the cervical sympathetic nerve at physiological frequencies induces in jaw muscle spindle afferents a short-latency decrease or suppression of discharge. This effect is very stereotyped in pattern and is attributed to direct sympathetic innervation of spindles. It is mediated by preganglionic S1-S2 sympathetic fiber groups. A longer-latency facilitatory effect follows, probably vasomotor in origin and mediated by S3-S4 groups. Both responses are eliminated by administration of alpha-adrenergic blocking agents. The latencies, patterns, thresholds, durations and reproducibility of these responses have been studied and the mechanisms possibly involved are discussed. |
| Volume: | 6 |
| Pagina iniziale: | 347 |
| Pagina finale: | 361 |
| Rivista: | JOURNAL OF THE AUTONOMIC NERVOUS SYSTEM |
| Appare nelle tipologie: | 03A-Articolo su Rivista |
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