Psychogenic nonepileptic seizures are episodes of movement, sensation, or behaviors that are similar to epileptic seizures but do not have a neurologic origin; rather, they are somatic manifestations of psychologic distress. Patients with psychogenic nonepileptic seizures frequently are misdiagnosed and treated for epilepsy. Video-electroencephalography monitoring is preferred for diagnosis. From 5 to 10 percent of outpatient epilepsy patients and 20 to 40 percent of inpatient epilepsy patients have psychogenic nonepileptic seizures.
Unformatted text preview: 373. Explain the function of the auditory tube. The function of the auditory tube ( Eustachian tube ) is to maintain equal air pressure on both sides of the tympanic membrane, which is necessary for normal hearing. 374. Distinguish between the osseous and the membranous labyrinths.
Ear tubes. Overview. Ear tubes (tympanostomy tubes, ventilation tubes, pressure equalization tubes) are tiny, hollow cylinders, usually made of plastic or metal, that are surgically inserted into the eardrum. An ear tube creates an airway that ventilates the middle ear and prevents the accumulation of fluids behind the eardrum. Ear tubes are often recommended for children who have persistent fluid buildup behind the eardrum, especially if the condition causes hearing loss and affects speech development.