Abstract
In rabbits, cats and rats anaesthetized, curarized, with the skull fixed in a stereotaxic apparatus, the peripheral stump of the cervical sympathetic nerve (c.s.n.) was electrically stimulated at frequencies within the physiological range and the isometric tension was recorded at the lower jaw. In a group of experiments the afferent discharges from the jaw elevator muscle spindles was also recorded, in the mesencephalic nucleus of the fifth cranial nerve.
Unilateral stimulation of the c.s.n. induced in jaw elevator muscles of rabbits an increase of tension of 5.5±0.5 g (latency: 0.5–2 s, time constant: 2.5–5 s) maintained with little or no decrement until the end of stimulation. This response proved not to be secondary to vasomotor changes since: i) approximately half of it was mediated by the fastest conducting component of the c.s.n. fibres, ii) it was not mimicked by a sudden reduction of blood supply to the muscles, iii) it was unaffected by 10 min bilateral occlusion of both the external and the internal carotid arteries. During c.s.n. stimulation the afferent discharge from spindles belonging to jaw elevator muscles exhibited an increase of firing (often preceded by a transient decrease) lasting throughout the stimulation. Also, the position sensitivity of all the spindle afferents tested was modified by the sympathetic stimulation.
The results presented are interpreted to suggest that the sympathetic system may induce an intrafusal muscle fibre contraction in jaw elevator muscles. The possible functional implications are also discussed.
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References
Ballard KJ (1978) Typical sympathetic noradrenergic endings in a muscle spindle of the cat. J Physiol 285:61P
Barker D, Saito M (1981) Autonomic innervation of receptors and muscle fibres in cat skeletal muscle. Proc Roy Soc Lond B 212:317–332
Bianconi R, Corazza R (1962) Sulla possibilità di risposte dissociate del sistema nervoso autonomo ortosimpatico. Arch Sci Biol 46:397–411
Boyd IA (1976) The response of fast and slow nuclear bag fibres and nuclear chain fibres in isolated cat muscle spindles to fusimotor stimulation, and the effects of intrafusal contraction on the sensory endings. Q J Exp Physiol 61:203–254
Bowman WC (1981) Effects of adrenergic activators and inhibitors on the skeletal muscles. In: Szekeres L (ed) Handbook of experimental pharmacology, Adrenergic activators and inhibitors, II. Chapter 2. Springer, Berlin Heidelberg New York, p 47
Calma I, Kidd GL (1962) The effect of adrenaline on muscle spindles in cat. Arch Ital Biol 100:381–393
Carli G, Diete-Spiff K, Pompeiano O (1967) Mechanisms of muscles spindle excitation. Arch Ital Biol 105:273–289
Celander O, Folkow B (1953) A comparison of the sympathetic vasomotor fibre control of the vessels within the skin and the muscles. Acta Physiol Scand 29:241–250
Dresel P, Wallentin I (1966) Effects of sympathetic vasoconstrictor fibres, noradrenaline and vasopressin on the intestinal vascular resistance during constant blood flow or blood pressure. Acta Physiol Scand 66:427–436
Dubner R, Sessle BJ, Storey AT (1978) Peripheral components of motor control. In: Dubner R, Sessle BJ, Storey AT (eds) The neural basis of oral and facial function. Plenum Press, New York, p 211
Eccles JC (1935) The action potential of the superior cervical ganglion. J Physiol (Lond.) 85:179–206
Eldred E, Schnitzlein HN, Buchwald J (1960) Response of muscle spindles to stimulation of the sympathetic trunk. Exp Neurol 2:13–25
Filippi GM, Grassi C, Passatore M (1983) The possible action of the cervical sympathetic nerves on intrafusal fibres of jaw muscle spindles in rabbit. J Physiol (Lond) 340:27–28P
Folkow B (1952) Impulse frequency in sympathetic vasomotor fibres correlated to the release and elimination of the transmitten. Acta Physiol Scand 25:49–76
Francini F, Peruzzi P, Staderini C (1978) Effects of sympathetic lumbar trunk stimulation on the myotatic reflex activity on the quadriceps muscle in decerebrate cat. Boll Soc Ital Biol Sper 54:1353–1356
Fukami Y (1984) Active force and sensory response of single isolated cat muscle spindles in vitro. J Neurophysiol 52:1131–1139
Goodwin GM, McCloskey DI, Matthews PBC (1972) The contribution of muscle afferents to kinaesthesia shown by vibration induced illusions of movement and by the effects of paralysing joint afferents. Brain 95:707–748
Hiiemae K (1971) The structure and function of the jaw muscles in the rat (Rattus norvegicus L.). III. The mechanis of the muscles. Zool J Linn Soc 50:111–132
Hughes R, Chapple DJ (1976) Effect of non-depolarizing neuromuscular blocking agents on peripheral autonomic mechanims in cats. Brit J Anaesth 48:59–68
Hunt CC (1960) The effect of sympathetic stimulation on mammalian muscle spindles. J Physiol (Lond) 151:332–341
Hunt CC, Jami L, Laporte U (1982) Effects of stimulating the lumbar sympathetic trunk on cat hindlimb muscle spindles. Archs Ital Biol 120:371–384
Hunter JI (1925) The sympathetic innervation on striated muscle. I. The dual innervation of striated muscle. Br Med J 1:197–201
Karlsen K (1965) The location of motor end plates and the distribution and histological structure of muscle spindles in jaw muscles of the rat. Acta Odontol Scand 23:521–547
Kollai M, Koizumi K, Brooks CMc (1978) Nature of differential sympathetic discharges in chemoreceptor reflex. Proc Nat Acad Sci USA 75:5239–5243
Korner PI (1971) Integrative neural cardiovascular control. Physiol Rev 51:312–367
Korner PI (1979) Central nervous control of autonomic cardiovascular function. In: Berne RM (ed) Handbook of physiology; the cardiovascular system, I. Williams-Wilkins, Baltimore, MD, p 691
Langelaan JW (1915) On muscle tonus. Brain 38:235–380
Matthews BHC (1933) Nerve endings in mammalian muscle. J Physiol (Lond) 78:1–53
Matthews PBC (1972) Mammalian muscle receptors and their control actions. Edward Arnold Ltd, London, p 140
Mosso A (1904) Teoria della tonicità muscolare fondata sulla doppia innervazione dei muscoli striati. Rend R Acad Lincei 13:174–180
Ninomija I, Irisawa H (1975) Non-uniformity of the sympathetic nerve activity in response to baroreceptor inputs. Brain Res 87:313–322
Passatore M (1976) Physiological characterization of efferent cervical sympathetic fibres influenced by changes of illumination. Exp Neurol 53:71–81
Passatore M, Filippi GM (1982) A dual effect of sympathetic nerve stimulation on jaw muscle spindles. J Auton Nerv Syst 6:347–361
Passatore M, Filippi GM, Grassi C (1985) Cervical sympathetic nerve stimulation can induce an intrafusal muscle fibre contraction in the rabbit. In: Boyd IA, Gladden MH (eds) The muscle spindle. Macmillan Press, London (in press)
Perroncito A (1903) Sulle terminazioni nervose nei muscoli a fibre striate. Congr Soc Ital Patol Firenze
Peruzzi P, Staderini G, Ambrogi Lorenzini C (1970) Integrated effects of sympathetic lumbar trunk stimulation on myotatic reflex activity of the ankle muscles of the cat. Life Sci 9:61–65
Phillips C (1931) On posture and postural reflex action: the effect of unilateral lumbar sympathetic chain extirpation. Brain 54:320–329
Polosa C (1968) Spontaneous activity of sympathetic preganglionic neurons. Can J Physiol Pharmacol 46:887–896
Richmond FJR, Abrahams VC (1975) Morphology and distribution of muscle spindles in dorsal muscles of the cat neck. J Neurophysiol 38:1322–1339
Santini M, Ibata Y (1971) The fine structure of thin unmyelinated axons within muscle spindles. Brain Res 33:289–302
Weijs WA, Dantuma R (1981) Functional anatomy of the masticatory apparatus in the rabbit (Orytolagus cuniculus L.). Neth J Zool 31:99–147
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This investigation was supported by CNR (Progetto Finalizzato: Medicina Preventiva e Riabilitativa — Sottoprogetto: Controllo del Dolore)
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Passatore, M., Grassi, C. & Filippi, G.M. Sympathetically-induced development of tension in jaw muscles: the possible contraction of intrafusal muscle fibres. Pflugers Arch. 405, 297–304 (1985). https://doi.org/10.1007/BF00595681
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DOI: https://doi.org/10.1007/BF00595681