Cerebral hemodynamic changes induced by sympathetic stimulation tests
نویسندگان
چکیده
منابع مشابه
Prefrontal hemodynamic changes produced by anodal direct current stimulation
Transcranial direct current stimulation (tDCS) is a noninvasive brain stimulation technique that has been investigated for the treatment of many neurological or neuropsychiatric disorders. Its main effect is to modulate the cortical excitability depending on the polarity of the current applied. However, understanding the mechanisms by which these modulations are induced and persist is still an ...
متن کاملOptical measurement of hemodynamic changes in the contralateral motor cortex induced by transcranial magnetic stimulation
Transcranial magnetic stimulation was used to activate the left motor cortex of four volunteers. The consequent hemodynamic changes in the right motor cortex were measured with optical imaging. Different stimulus intensities were applied, and a sham measurement was made in which the coil was tilted 90 degrees from its tangential orientation, so that it the induced electric field is not sufficie...
متن کاملCerebral Hemodynamic Changes Induced by a Lumbar Puncture in Good-Grade Subarachnoid Hemorrhage
BACKGROUND Patients with good-grade subarachnoid hemorrhage (SAH) are those without initial neurological deficit. However, they can die or present severe deficit due to secondary insult leading to brain ischemia. After SAH, in a known context of energy crisis, vasospasm, hydrocephalus and intracranial hypertension contribute to unfavorable outcome. Lumbar puncture (LP) is sometimes performed in...
متن کاملChanges in immunoglobulin A secretion induced by sympathetic and taste stimulation in the rat submandibular gland
Secretion of saliva is dependent on stimuli from autonomic nerves that are the effector arms of reflexes activated predominantly by taste and chewing. Nerve mediated stimulus evokes saliva secretion of water and proteins by different mechanisms. Secretion of submandibular saliva is controlled by the autonomic nervous system. The parasympathetic nervous system is the main controller of this secr...
متن کاملFluorescence Changes in Nerve Induced by Stimulation
It was previously assumed, on the basis of changes in the ultraviolet absorption spectrum and of increase in ionizable sulfhydryl groups, that during excitation the proteins of excitable structures undergo some structural rearrangements, and these rearrangements may be similar to those designated by the term transconformation. In the present experiments, it was observed that electrical stimulat...
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: Yonsei Medical Journal
سال: 1998
ISSN: 0513-5796
DOI: 10.3349/ymj.1998.39.4.322