Head | Neurology | Instability or Dizziness (Symptom)
Instability or Dizziness: Description
Dizziness is a disorder characterized by impaired sensation can progress to a loss of consciousness.
Instability or Dizziness: Causes
A dizziness is often benign, it may be a consequence of orthostatic hypotension (blood pressure decrease when the momentary passing quickly from a lying or sitting to standing position), a vagal ailments (slow heart rate and blood pressure fall), hypoglycaemia (low blood sugar concentration), a benign paroxysmal vertigo, making it a home search otorhinolaryngology, a thrill, an insufficient vertebrobasilar (arthritis of the spine, bringing about a dizziness when the head bends back, by compressing a arteries, which, in turn, often atheromatous).
Dizziness can have other causes, less common but more serious: a disorder of cardiac rhythm or conduction, a transient ischemic attack (partial or intermittent obstruction of the cerebral circulation), an intracerebral hematoma, especially after an injury or a brain tumour . Often, dizziness benign disappear at rest. Their persistence, the evolution of disturbances to indicate a worsening vertigo and is an invitation to a physician. For starters, to differentiate between true vertigo and a feeling that you have when no air, for example.
The causes of dizziness are numerous, but more or less serious. Depending on the origin of disorder is talking about causes of central origin and causes of peripheral origin. In the first case, the origin of these disorders lies in the brain than occurs in body position and orientation in space.
Regarding dizziness caused by peripheral causes, they occur as a result of disruption in the bodies responsible for motion analysis and dissemination of the brain. Central causes: benign or malignant brain tumours, multiple sclerosis, stroke affecting the cerebellum, lack of vascularity, compression, etc. small cerebral arteries of the brain.