Anatomy.-The tympanic membrane is the same size in the new-born as in the adult. It lies almost horizontal in the plane of the base of the skull, so that its lateral border is almost in the same plane as the superior wall of the meatus. Thus the postero-superior quadrant, the region in which bulging is usually detected, is very near the surface and next the inner limit of the superior wall of t...

In this study lateral differences in tympanic membrane temperature (T(Ty)) were explored as a correlate of either impulsive or cautious responding in Go-No-Go tasks. Thirty-two women and men performed two sustained attention to response tasks (Go-No-Go tasks). Those with warmer right in comparison to left tympanic membranes were more cautious, and those with warmer left in comparison to right t...

UNLABELLED The use of animal samples is important in otologic research and understanding the anatomy of their ears help make proper use of them in research projects. AIM to study guinea pig's and rat's ears under light microscopy(LM) and scanning electron microscopy(SEM) and understand their anatomical advantages in basic otologic research. MATERIALS AND METHODS The temporal bones, tympanic...

A 6-year-old girl with Down syndrome was referred to our team for joint management. She was having severe speech and language difficulties. Her hearing was assessed, and the pure tone audiometry showed a moderate conductive hearing loss (40 dB) in the left ear and profound hearing loss in the right ear. A CT scan and MRI of temporal bone (Figs. 1 and 2) revealed a hypodense mass in the left tym...

OBJECTIVE To explain a clinical observation: a notch in the stimulus spectrum during transient evoked otoacoustic emission measurement in ears with secretory otitis media. METHODS The effects of tympanic under-pressure were investigated using a pressure chamber. A model of the ear canal was also studied. RESULTS Tympanic membrane reflectance increased as a consequence of increased stiffness...

Introduction and Aim: The aim of the present study was to compare aural temperature measurements with conventional methods (axillary and oral) in patients with unilateral tympanic membrane perforation or myringosclerosis. The study also aimed to test the potential nasal use of infrared thermometer. Materials and Methods: Forty-four adult patients with monoaural tympanic membrane perforation and...

OBJECTIVE To describe a relatively unknown clinical entity - inflammatory cast of the tympanic membrane after acute otitis media - and its simple out-patient treatment. STUDY DESIGN Retrospective review of case series. SETTING Subspecialty practice at a tertiary hospital. PATIENTS Seven patients diagnosed previously with acute otitis media with perforation or otitis externa, and with pers...

OBJECTIVES To examine the favorable effects of vitamin E on tympanic membrane perforations induced mechanically in guinea pigs. STUDY DESIGN Bilateral tympanic membrane perforations of 1.8 mm were induced in 40 guinea pigs. The animals were randomly divided into two groups equal in number. One group remained untreated, while the other was administered vitamin E (100 mg/kg/day) through intramu...

We report the results of anatomical and vibrometric studies of the middle ear of the African clawed frog, Xenopus laevis. The cartilaginous tympanic disk of Xenopus shows pronounced sexual dimorphism, that of male frogs being much larger than that of females, relative to body size. The stapes footplate, however, is not enlarged in males. The cucullaris muscle was found to insert on the stapes i...

Mechanics of tympanic membrane (TM) is crucial for investigating the acoustic transmission through the ear. In this study, we studied the wrinkling behavior of tympanic membrane when it is exposed to mismatched air pressure between the ambient and the middle ear. The Rayleigh-Ritz method is adopted to analyze the critical wrinkling pressure and the fundamental eigenmode. An approximate analytic...