This thesis is concerned with the analysis of the mastoid electroencephalogram (EEG) using parametric modelling and neural network techniques in order to assess the vigilance of a human subject. One possible application of this work would be the design of a monitoring system for tracking the transitions within the vigilance continuum. A system for monitoring the vigilance of individuals involve...

OBJECTIVES To present a series of temporal en plaque meningiomas involving the middle ear or mastoid, whose main symptoms suggested a serous otitis media. STUDY DESIGN AND SETTINGS Multicentric retrospective study reviewing clinical records originating from eight tertiary referral centers. MATERIALS AND METHODS The clinical records of 10 patients presenting with signs and symptoms suggestin...

Introduction. Osteoma of the temporal bone is a very uncommon benign tumor of bone. Osteomas may occur in the external auditory canals but are reported to be very rare in the mastoid bone. Case Report. A 36-year-old male presented to our department with a hard swelling behind the right ear diagnosed as osteoma. Complete excision was done through a postauricular approach. Histopathology confirme...

THE problem of healing in mastoid cavities is still with us despite many advances in knowledge and operative techniques. The optimal cavity should be small, completely lined by nourishing epithelium and accessible through an adequate meatus. The problem is as old as otology itself but it has received renewed impetus and urgency from the belated recognition that however successful tympanoplasty ...

A 39-year-old male was admitted to our clinic with symptoms of headache, dizziness, nausea, otalgia, otorrhea, tinnitus, and hearing loss in both ears for 3 weeks. Physical examination revealed edema in the tympanic membrane and external ear canal, and pain by palpation in the mastoid area bilaterally. There was no nystagmus, and the rest of the physical examination was otherwise normal. Tempor...

OBJECTIVE To develop a staging system for congenital cholesteatoma in predicting the likelihood of residual disease. DESIGN Retrospective analysis of data from a case series, to identify predictors of residual disease. SETTING Tertiary care pediatric hospital. PARTICIPANTS Children undergoing surgical removal of congenital cholesteatoma. There were 156 patients, with 160 cholesteatomas; 4...

Introduction The objectives of mastoidectomy in cholesteatoma are a disease-free and dry ear, the prevention of recurrent disease, and the maintenance of hearing or the possibility to reconstruct an affected hearing mechanism. Canal wall down mastoidectomy has been traditionally used to achieve those goals with greater or lesser degrees of success. However, canal wall down is an aggressive appr...

OBJECTIVES To describe middle ear ventilation route blockage, relieved during middle ear endoscopic surgery, and to analyze its association with mastoid hypopneumatization/sclerotization. STUDY DESIGN Prospective case series with intraoperative analyses, and with a case-control computed tomographic scan comparison. METHODS Intraoperative findings during endoscopic middle ear surgery are des...