نتایج جستجو برای: parasympathetic
تعداد نتایج: 5078 فیلتر نتایج به سال:
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...
The parasympathetic vagus nerve supplies the heart and lung. Parasympathetic activity modifies rate force of contraction in Airway bronchial smooth muscle constriction hypersecretion mucus lungs. There is a link between these two components. Hence this study designed to find association Spectral analysis variability pulmonary function tests asthma patients. In study, 30 asthmatic patients were ...
چکیده ندارد.
The bradycardic response to baroreceptor stimulation is impaired in human and experimental hypertension. Because this bradycardia mainly depends on the vagus, this may reflect a reduced cardiac parasympathetic responsiveness, which would parallel the reduced cardiac adrenergic responsiveness observed in hypertension. To test this hypothesis, 12-week-old spontaneously hypertensive rats (n = 12) ...
Hypertension, cardiac hypertrophy, and heart failure (HF) are widespread and debilitating cardiovascular diseases that affect nearly 23 million people worldwide. A distinctive hallmark of these cardiovascular diseases is autonomic imbalance, with increased sympathetic activity and decreased parasympathetic vagal tone. Recent device-based approaches, such as implantable vagal stimulators that st...
Little is known about the neuronal voltage-gated sodium channels (NaVs) that control neurotransmission in the parasympathetic nervous system. We evaluated the expression of the α subunits of each of the nine NaVs in human, guinea pig, and mouse airway parasympathetic ganglia. We combined this information with a pharmacological analysis of selective NaV blockers on parasympathetic contractions o...
Neurotransmitters released from sympathetic and parasympathetic nerve terminals in the sinoatrial node (SAN) exert their effects via G-protein-coupled receptors. Integration of these different G-protein signals within pacemaker cells of the SAN is critical for proper regulation of heart rate and function. For example, excessive parasympathetic signaling can be associated with sinus node dysfunc...
Identification of human parasympathetic preganglionic neurons in pontomedullary regions has been largely based on studies using cholinesterase histochemical procedures, and so far there is no adequate account of the location of these cells. Nitric oxide synthase (NOS) is present in brainstem parasympathetic preganglionic salivatory neurons in the rabbit (Zhu et al., 1996). In the present study ...
BACKGROUND Ketamine increases both blood pressure and heart rate, effects commonly thought of as sympathoexcitatory. The authors investigated possible central nervous system actions of ketamine to inhibit cardiac parasympathetic neurons in the brainstem by inhibiting multiple nicotinic excitatory mechanisms. METHODS The authors used a novel in vitro approach to study the effect of ketamine on...
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