Authoritarian regimes are also sometimes subcategorized by whether they are personalistic or populist. Personalistic authoritarian regimes are characterized by arbitrary rule and authority exercised mainly through patronage networks and coercion rather than through institutitions and formal rules..
Fluid accumulation is the most common cause of conductive hearing loss in the middle ear, especially in children. Major causes are ear infections or conditions that block the eustachian tube, such as allergies or tumors.
Otosclerosis is one of the most common causes of progressive deafness in young adults. 'Otosclerosis is caused by an abnormal growth of bone in the ears, which causes hearing loss. In most cases, a surgical operation will restore the hearing. Otosclerosis has to do with the three small bones in the middle ear, more specifically the stapes. A part of the bone will grow abnormally and this bone growth will prevent the stapes from vibrating normally in response to sound.