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Anatomy of the Ear

Anatomy of the Ear

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...

The Cochlea

The 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.

The Auditory Ossicles

The Auditory Ossicles

The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...

Hair Cells

Hair Cells

Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.

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Related Experiment Video

Updated: Mar 13, 2026

Surgical Treatment of an Endolymphatic Sac Tumor

Surgical Treatment of an Endolymphatic Sac Tumor

Published on: May 26, 2023

Auricular pseudocysts.

Uwe Wollina¹, Anastasya A Chokoeva², Georgi Tchernev³

¹Department of Dermatology and Allergology, Academic Teaching Hospital Dresden-Friedrichstadt, Friedrichstrasse 41, 01067, Dresden, Germany. wollina-uw@khdf.de.

Wiener Medizinische Wochenschrift (1946)

|October 13, 2016

Summary

This summary is machine-generated.

Auricular pseudocysts, uncommon ear lesions, may stem from trauma. Minor invasive procedures offer effective treatment with low recurrence, avoiding disfigurement.

Keywords:

Benign lesions Differential diagnosis Pinna Surgery

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Area of Science:

Otolaryngology
Dermatology
Plastic Surgery

Background:

Auricular pseudocysts are rare, benign growths on the ear's pinna.
The exact cause is unknown, but repeated trauma is a suspected trigger.
Accurate diagnosis is crucial to prevent unnecessary or disfiguring treatments.

Observation:

These lesions require precise diagnosis to guide appropriate management.
Treatment strategies vary based on the pseudocyst's stage and severity.
Surgical interventions are the primary approach for managing auricular pseudocysts.

Findings:

Minor invasive surgical procedures demonstrate high efficacy in treating auricular pseudocysts.
These minimally invasive techniques are associated with favorable outcomes.
Low recurrence rates are observed following appropriate surgical intervention.

Implications:

Effective management of auricular pseudocysts can prevent cosmetic deformities.
Minimally invasive approaches offer a balance between efficacy and patient aesthetics.
Further research into the etiology may refine preventative strategies for auricular pseudocysts.