نتایج جستجو برای: parasympathetic system
تعداد نتایج: 2233776 فیلتر نتایج به سال:
Entrainment is the integration or harmonization of oscillators. All organisms pulsate with myriad electrical and mechanical rhythms. Many of these rhythms emanate from synchronized pulsating cells (eg, pacemaker cells, cortical neurons). The cranial rhythmic impulse is an oscillation recognized by many bodywork practitioners, but the functional origin of this impulse remains uncertain. We propo...
Young men were subjected to laboratory inductions of anger and anxiety after undergoing a physiological assessment of vagal tone, an index of parasympathetic nervous system functioning that has been associated with emotion regulation in prior research. We tested whether: (i) young men’s emotional reactivity and recovery were associated with their global attachment style or their perceptions of ...
Autonomic nervous system plays an important role in the regulation of mammalian heart, and it is divided into the sympathetic and parasympathetic (vagal) subsystems. The parasympathetic (vagal) control of the atria involves modulation of chronotropic, dromotropic and inotropic activities, but the role of the parasympathetic innervation of the ventricles is still unclear. There is a common misco...
The parasympathetic nervous system plays an important role in the pathophysiology of atrial fibrillation. Catheter ablation, a minimally invasive procedure deactivating abnormal firing cardiac tissue, is increasingly becoming the therapy of choice for atrial fibrillation. This is inevitably associated with the obliteration of cardiac cholinergic neurons. However, the impact on ventricular elect...
The autonomic nervous system plays an important role in a wide range of visceral-somatic and mental diseases. Cardiac parameters, particularly heart rate as a physiological measure, are extremely sensitive to autonomic influences. Normally, the activities of the sympathetic and parasympathetic branches of the autonomic nervous system are in dynamic balance indicating healthy and flexible physio...
Paraganglioma are tumors that arise within the sympathetic and parasympathetic nervous system. About 10% of paraganglioma spread to distant sites. Malignant potential has been difficult to be determined by histologic characteristic and it is defined after a metastatic lesion or direct invasion found in a site with no residual embryonic paraganglionic tissue. In this case report, a 5...
BACKGROUND The parasympathetic nervous system contributes to the pathophysiology of multiple forms of allergic and nonallergic rhinitis. Stimulation of the parasympathetic nervous system leads to glandular activation, which produces watery secretions. In excess, these secretions discharge from the anterior Nares and produce the symptom of watery anterior rhinorrhea. METHOD Review of literatur...
BACKGROUND AND AIM Pranayama, the art of breath control, is considered to be the heart of yogic exercises. The present study was performed with the aim of evaluating the effect of Pranayama/Alternate Nostril Breathing (A.N.B.) on the parasympathetic nervous system in healthy young adult males. METHODS A comparative account of the expiratioin: inspiration ratio (E:I ratio) and the orthostatic ...
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...
The ratio between low-frequency (LF) and high-frequency (HF) spectral power of heart rate has been used as an approximate index for determining the autonomic nervous system (ANS) balance. An accurate assessment of the ANS balance can only be achieved if clear separation of the dynamics of the sympathetic and parasympathetic nervous activities can be obtained, which is a daunting task because th...
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