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.
The ear is divided into three components, the outer ear (pinna), the middle ear, and the inner ear. Each component of the ear has its unique functions. The external ear consist of two portions, the first being the pinna, the skin covered flabby cartilage of the ear visible on both sides of the head.The basic function of the outer ear or pinna is to protect the eardrum (tympanic membrane).earing The most basic function of the ear is hearing. The following is the short description of the hearing process: The first step is when the pinna collects external sounds that enter through the meatus or ear canal as sound waves. The ear drum begins to vibrate as these sound waves strikes.