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Related Concept Videos

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...
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.
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.
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...
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
Hair Cells01:22

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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Drivers and modulators in the central auditory pathways.

Charles C Lee1, S Murray Sherman

  • 1Department of Neurobiology, University of Chicago Chicago, IL, USA.

Frontiers in Neuroscience
|July 1, 2010
PubMed
Summary
This summary is machine-generated.

Researchers identified two distinct auditory glutamatergic pathways: "drivers" for information and "modulators" for modifying signals. This discovery clarifies the roles of poorly understood auditory pathways and aids in categorizing others.

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Neuroanatomy

Background:

  • The traditional model of auditory processing involves a linear pathway from the ear to the brain.
  • Numerous parallel ascending and descending pathways exist, but their functions in auditory processing remain unclear.

Purpose of the Study:

  • To differentiate between auditory glutamatergic pathways.
  • To define the roles of these pathways in auditory information processing.

Main Methods:

  • Identification of anatomical and physiological properties distinguishing auditory glutamatergic pathways.
  • Classification of pathways into "drivers" and "modulators" based on these properties.

Main Results:

  • Auditory glutamatergic pathways were categorized into two distinct groups: drivers and modulators.
  • Driver pathways are linked to primary information transmission, while modulators influence these streams.

Conclusions:

  • The driver/modulator classification provides insight into the functions of previously ambiguous auditory pathways.
  • This framework can be applied to further characterize unknown or misidentified pathways within the auditory system.