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.
Tympanostomy tube: A small plastic tube inserted into the eardrum to keep the middle ear aerated for a prolonged period of time.These ventilating tubes usually remain in place for 6 months to several years. Eventually, most will move out of the eardrum (extrude) and fall out into the ear canal. Also called ear tubes.ympanostomy tube: A small plastic tube inserted into the eardrum to keep the middle ear aerated for a prolonged period of time.