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Related Concept Videos

Anatomy of the Ear01:16

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...
Auditory Pathway01:15

Auditory Pathway

Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
The Cochlea01:13

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 Ossicles01:11

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...
Hearing01:31

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...

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Related Experiment Video

Updated: Jun 25, 2026

Selective Tracing of Auditory Fibers in the Avian Embryonic Vestibulocochlear Nerve
11:27

Selective Tracing of Auditory Fibers in the Avian Embryonic Vestibulocochlear Nerve

Published on: March 18, 2013

Functional groups in the avian auditory system.

Sarah M N Woolley1, Patrick R Gill, Thane Fremouw

  • 1Department of Psychology, Columbia University, New York, New York 10027, USA. sw2277@columbia.edu

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|March 6, 2009
PubMed
Summary
This summary is machine-generated.

Auditory neurons in songbirds are functionally grouped to process complex sound features like pitch, timbre, and rhythm. This organization is refined as auditory information ascends from the midbrain to the forebrain.

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Slicing the Embryonic Chicken Auditory Brainstem to Evaluate Tonotopic Gradients and Microcircuits

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Related Experiment Videos

Last Updated: Jun 25, 2026

Selective Tracing of Auditory Fibers in the Avian Embryonic Vestibulocochlear Nerve
11:27

Selective Tracing of Auditory Fibers in the Avian Embryonic Vestibulocochlear Nerve

Published on: March 18, 2013

In Ovo and Ex Ovo Methods to Study Avian Inner Ear Development
10:09

In Ovo and Ex Ovo Methods to Study Avian Inner Ear Development

Published on: June 16, 2022

Slicing the Embryonic Chicken Auditory Brainstem to Evaluate Tonotopic Gradients and Microcircuits
08:24

Slicing the Embryonic Chicken Auditory Brainstem to Evaluate Tonotopic Gradients and Microcircuits

Published on: July 12, 2022

Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Computational Neuroscience

Background:

  • Auditory perception relies on how auditory neurons encode acoustic features.
  • Understanding neural processing of complex sounds is crucial for deciphering perception.

Purpose of the Study:

  • To classify auditory neurons into functional groups based on their response properties.
  • To investigate how neural tuning for complex sound features evolves in the auditory pathway.

Main Methods:

  • Recorded electrophysiological responses of single auditory neurons in songbird midbrain and forebrain.
  • Calculated spectrotemporal receptive fields (STRFs) to measure neural tuning.
  • Utilized cluster analysis to classify neurons based on STRF shape.

Main Results:

  • Identified distinct functional groups of auditory neurons in both midbrain and forebrain.
  • These groups selectively process acoustic features related to pitch, timbre, and rhythm.
  • Found evidence of both inherited and emergent tuning properties as information ascends the auditory pathway.

Conclusions:

  • Auditory neurons are functionally specialized for extracting specific complex sound features.
  • Neural processing of sound involves hierarchical organization and refinement from midbrain to forebrain.
  • This study provides insights into the neural basis of auditory perception in songbirds.