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Reflex syncope can occur in otherwise healthy individuals, and has many possible causes, often trivial ones such as prolonged standing with the legs locked. [ citation needed ] The main danger of vasovagal syncope (or dizzy spells from vertigo) is the risk of injury by falling while unconscious.
Efferent vagus nerve fibers innervating the pharynx and back of the throat are responsible for the gag reflex. In addition, 5-HT 3 receptor-mediated afferent vagus stimulation in the gut due to gastroenteritis is a cause of vomiting. [8] Stimulation of the vagus nerve in the cervix uteri (as in some medical procedures) can lead to a vasovagal ...
Brainstem lesions may include cranial nerve III, IV, VI and VIII nuclei, the medial thalamic nuclei, and the dorsal nucleus of the vagus nerve. Oedema may be found in the regions surrounding the third ventricle, and fourth ventricle, also appearing petechiae and small hemorrhages. [54] Chronic cases can present the atrophy of the mammillary ...
The results of the trial, published last month in a pair of studies in the journal Brain Stimulation, show that stimulating the vagus nerve can alleviate depressive symptoms, improve life quality ...
Vagus nerve stimulation can also increase the release of important brain chemicals such as serotonin and norepinephrine, which help regulate mood and are typically low in people with depression ...
Existing treatments aim to suppress the immune system to prevent further damage to nerve cells. A new study has developed a treatment that can help regenerate myelin with the potential to stop and ...
The inflammatory reflex is a neural circuit that regulates the immune response to injury and invasion. All reflexes have an afferent and efferent arc. The Inflammatory reflex has a sensory afferent arc, which is activated by cytokines and a motor or efferent arc, which transmits action potentials in the vagus nerve to suppress cytokine production.
In contrast, pseudobulbar palsy is a clinical syndrome similar to bulbar palsy but in which the damage is located in upper motor neurons of the corticobulbar tracts in the mid-pons (i.e., in the cranial nerves IX-XII), that is the nerve cells coming down from the cerebral cortex innervating the motor nuclei in the medulla.