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Dissection of the Auditory Bulla in Postnatal Mice: Isolation of the Middle Ear Bones and Histological Analysis
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High-resolution computed tomography of the middle ear and mastoid. Part I: Normal radioanatomy including normal
Radiology
|August 1, 1983
Abstract:
The use of high-resolution computed tomography (CT) to examine the middle ear and mastoid is discussed. Exceptional detail of the viscera of the middle ear was attained in almost all cooperative patients with proper technique. Important anatomical structures are illustrated and discussed, and the appropriate projection for depicting specific structures is emphasized. Normal variations, preoperative knowledge of which is important to the otologic surgeon, are also illustrated.
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01:13The Cochlea
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
01:10Computed Tomography
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Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...