<unk>  begins with some stressor, trauma, or psychological distress. Usually the physical symptoms of the syndrome affect the senses or movement. Common symptoms include blindness, partial or total paralysis, inability to speak, deafness, numbness, difficulty swallowing, incontinence, balance problems, seizures, tremors, and difficulty walking. The symptom of feeling unable to breathe, but where the lips are not turning blue, can indicate<unk>  or sleep paralysis. Sleep paralysis and narcolepsy can be ruled out with sleep tests. These symptoms are attributed to<unk>  when a medical explanation for the afflictions cannot be found. Symptoms of<unk>  usually occur suddenly.<unk>  is typically seen in people aged 10 to 35, and affects between 0.011% and 0.5% of the general population.<unk>  can present with motor or sensory symptoms including any of the following: Motor symptoms or deficits: * Impaired coordination or balance * Weakness/paralysis of a limb or the entire body (hysterical paralysis or motor<unk> s) * Impairment or loss of speech (hysterical aphonia) * Difficulty swallowing (dysphagia) or a sensation of a lump in the throat * Urinary retention * Psychogenic non-epileptic seizures or convulsions * Persistent dystonia * Tremor, myoclonus or other movement<unk> s * Gait problems (astasia-abasia) * Loss of consciousness (fainting) Sensory symptoms or deficits: * Impaired vision (hysterical blindness), double vision * Impaired hearing (deafness) * Loss or disturbance of touch or pain sensation<unk>  symptoms typically do not conform to known anatomical pathways and physiological mechanisms. It has sometimes been stated that the presenting symptoms tend to reflect the patient's own understanding of anatomy and that the less medical knowledge a person has, the more implausible are the presenting symptoms. However, no systematic studies have yet been performed to substantiate this statement.
Conversion disorder
Somatization disorder
Otodental syndrome
Malingering
Bruxism
Anterior cerebral artery syndrome
Perisylvian syndrome
Diencephalic syndrome