Prejunctional dopamine receptors modulate twitch responses to parasympathetic nerve stimulation in the rabbit isolated rectococcygeus muscle
نویسندگان
چکیده
منابع مشابه
Presence of prejunctional D2-dopaminoceptors and α2-adrenoceptors on the cholinergic nerve of the common bile duct of guinea pig
On most adrenergic and cholinergic nerve terminals, prejunctional α-adrenoceptors belonging to the α2-subtype have been identified. Activation of these receptors will decrease the release of norepinephrine. It has been reported that several isolated tissue preparations contain prejunctional dopamine receptors, the stimulation of which inhibits neurotransmission. It has remained uncertain whethe...
متن کاملMEDIAN NERVE STIMULATION PO TENTIATES THE MU SCLE RESPONSES TO TRANS C RANIAL MAGNETIC STIMULATION
Motor responses evoked by transcranial magnetic stimulation OMS) or transcranial electrical stimulation (TCS) can be facilitated by a prior conditioning stimulus to an afferent nerve. Two facilitation periods are described short (SI), when the nerve stimulus is given near 0 to 10 ms after cranial stimulation, and long (LI), when nerve stimulation is given 25-60 ms before the cranial stimula...
متن کاملVascular responses to stimulation of receptors in muscle by capsaicin.
WEBB-PEPLOE, MICHAEL M., DAVID BRENDER, AND JOHN T. SHEPHERD. Vascular responses to stimulation of receptors in muscle by 1 $vaicin. Am. J. Physiol. 222( 1) : 189-195, 1972.-In dogs anesthetized with thiopentone and chloralose, a’nd with both vagi ancl carotid sinus nerves sectioned, the injection of capsaicin into one iliac artery caused a reflex constriction of hindlimb, gut, and renal resist...
متن کاملModulation by neuropeptide Y of parasympathetic nerve-evoked nasal vasodilatation via Y2 prejunctional receptor.
1. In pentobarbitone anaesthetized dogs, preganglionic stimulation of the superior cervical sympathetic nerve (15V, 1 ms, 10 Hz) induced marked reduction of nasal arterial blood flow, whereas parasympathetic nerve stimulation (5 V, 1 ms, 10-30 Hz) evoked frequency-dependent vasodilatation. 2. Sympathetic nerve stimulation for 3 min at 10 Hz evoked significant (P < 0.05) and prolonged attenuatio...
متن کاملNo evidence for involvement of dopaminergic receptors in the positive inotropic action of dopamine on the isolated rabbit papillary muscle.
Experiments were carried out on the isolated rabbit papillary muscle driven at 0.5 Hz in order to further elucidate the mechanism of the positive inotropic effect evoked by dopamine. The dose-response curve for dopamine was not affected by the antagonists pimozide (10(-6) M), yohimbine (10(-5) M) pindolol (3 x 10(-8) M) and phentolamine (10(-6) M) when these agents were given separately. Only t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: British Journal of Pharmacology
سال: 1984
ISSN: 0007-1188
DOI: 10.1111/j.1476-5381.1984.tb16526.x