the authors used high-resolution computed tomography (hrct) for studying 52 congenitally malformed ears in 45 children between five and 10 years of age. in six children the malformations were bilateral. the malformations clinically manifested as microtia, atresia of the external auditory canal and conductive deafness. analyzing anatomical details and pathological changes on hrct axial sections ...

Osteomas of the external ear are uncommon benign tumors that need to be differentiated from the external ear canal exostoses, bony proliferations that are linked mainly to cold-water exposure. Clinical manifestations vary from no symptoms to recurrent local infections and external ear cholesteatoma. Objective: presenting a rare case that we did not find described in the published literature. A ...

The practical points in the differential diagnosis of the various acute painful conditions of the ear are not clearly mentioned in textbooks on the subject, and hence the following lines are meant to point out very briefly the important distinguishing features in their diagnosis. It is best to divide them into acute painful conditions of the external, middle and internal ear, and to referred pa...

Conventional external hearing aids can be generally subdivided into air-conduction hearing aids and bone-conduction hearing aids. Air-conduction hearing aids require the use of ear molds, which may be problematic in patients with chronic middle ear and ear canal infections, atresia of the external canal, or an ear canal that cannot accommodate an ear mold. Bone-conduction hearing aids function ...

Learning Objectives: After studying this article, the participant should be able to: 1. Understand the anatomy and embryology of the external ear. 2. Understand the anatomic causes of the prominent ear. 3. Understand the operative maneuvers used to shape the external ear. 4. Be able to sequence the otoplasty for consistent results. 5. Understand the possible complications of the otoplasty proce...

The external-ear transfer function for big brown bats (Eptesicus fuscus) contains two prominent notches that vary from 30 to 55 kHz and from 70 to 100 kHz, respectively, as sound-source elevation moves from -40 to +10 degrees. These notches resemble a higher-frequency version of external-ear cues for vertical localization in humans and other mammals. However, they also resemble interference not...

Ear pain, also known as earache or otalgia, is pain in the ear. The pain that originates inside the ear is called as Primary ear pain or otogenic otalgia. It can be caused by disease in the inner, middle, or external ear, but the three are difficult to distinguish in terms of the pain experienced [1]. If ear pain arises from pathologies in surrounding structures it is called as secondary or ref...

OBJECTIVES To investigate the best time of examination and section chosen of routine prenatal ultrasound screening for external ear abnormalities and evaluate the feasibility of examining the fetal external ear with ultrasonography. METHODS From July 2010 until August 2011, 42118 pregnant women with single fetus during 16-40 weeks of pregnancy were enrolled in the study. Fetal auricles and ex...

It has been suggested that the first spectral peak and the first two spectral notches of head-related transfer functions (HRTFs) are cues for sound localization in the median plane. Therefore, to examine the mechanism for generating spectral peaks and notches, HRTFs were calculated from four head shapes using the finite-difference time-domain method. The comparison between HRTFs calculated from...

Under natural conditions, animals encounter a barrage of sensory information from which they must select and interpret biologically relevant signals. Active sensing can facilitate this process by engaging motor systems in the sampling of sensory information. The echolocating bat serves as an excellent model to investigate the coupling between action and sensing because it adaptively controls bo...