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The usual symptoms are tinnitus, ataxia, difficulty with coordination, vertigo, nausea, vomiting, and hearing loss. [10] [11] It is not unusual for other symptoms of decompression sickness to be present simultaneously, which can make diagnosis easier, but sometimes only vestibular symptoms manifest.
The caloric reflex test is designed to test the function of the vestibular system and can determine the cause of vestibular symptoms. The reflex test consists of pouring water into the external auditory canal of a patient and observing nystagmus, or involuntary eye movement. With normal vestibular function, the temperature of the water has an ...
Voice stress analysis (VSA) and computer voice stress analysis (CVSA) are collectively a pseudoscientific technology that aims to infer deception from stress measured in the voice. The CVSA records the human voice using a microphone, and the technology is based on the tenet that the non-verbal, low-frequency content of the voice conveys ...
Central vertigo is less common and is caused by a problem in the brain. It might be in the brain stem. It could also be in the back part of the brain, called the cerebellum.
Voice problems that require voice analysis most commonly originate from the vocal folds or the laryngeal musculature that controls them, since the folds are subject to collision forces with each vibratory cycle and to drying from the air being forced through the small gap between them, and the laryngeal musculature is intensely active during speech or singing and is subject to tiring.
Spasmodic dysphonia, also known as laryngeal dystonia, is a disorder in which the muscles that generate a person's voice go into periods of spasm. [1] [2] This results in breaks or interruptions in the voice, often every few sentences, which can make a person difficult to understand. [1]
Benign vertigo episodes generally last less than one minute. [2] The Dix-Hallpike test typically produces a period of rapid eye movements known as nystagmus in this condition. [1] In Ménière's disease there is often ringing in the ears, hearing loss, and the attacks of vertigo last more than twenty minutes. [9]
Usual onset: Age from 50s to 70s [2] Duration: Episodes less than a minute [3] Risk factors: Older age, minor head injury [3] Diagnostic method: Positive Dix–Hallpike test after other possible causes have been ruled out [1] Differential diagnosis: Labyrinthitis, Ménière's disease, stroke, vestibular migraine [3] [4] Treatment