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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...
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.
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.
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.
Feedback Inhibition00:46

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.

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Related Experiment Video

Updated: Jun 13, 2026

In Vitro Wedge Slice Preparation for Mimicking In Vivo Neuronal Circuit Connectivity
10:31

In Vitro Wedge Slice Preparation for Mimicking In Vivo Neuronal Circuit Connectivity

Published on: August 18, 2020

Inhibitory neurons hear themselves during development.

Scott F Owen1, Richard W Tsien

  • 1Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA. sfowen@stanford.edu

Neuron
|May 4, 2010
PubMed
Summary
This summary is machine-generated.

Researchers discovered "preminis," a novel type of miniature synaptic event originating from presynaptic terminals in the cerebellum. These events, which occur in GABAergic neurons, may be crucial for developing neural circuits.

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Related Experiment Videos

Last Updated: Jun 13, 2026

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Published on: March 18, 2013

Area of Science:

  • Neuroscience
  • Cell Biology
  • Developmental Biology

Background:

  • Miniature synaptic events (MSEs) are crucial for understanding neural connectivity and circuit development.
  • Spontaneous neurotransmitter release, independent of action potentials, underlies MSEs.
  • MSEs are vital for neuronal circuit maintenance and development.

Discussion:

  • Trigo et al. report a novel class of MSEs termed "preminis."
  • Preminis originate from and are detected by presynaptic terminals of GABAergic neurons in the cerebellar molecular layer.
  • These events significantly outnumber conventional minis.

Key Insights:

  • Preminis are a newly identified type of miniature synaptic event.
  • They are specifically observed in GABAergic neurons within the developing cerebellum.
  • Their prevalence suggests a significant role in synaptic function.

Outlook:

  • The transient nature of preminis (present for <15 days post-birth) suggests a critical role in early neuronal wiring.
  • Preminis may be essential for the precise assembly of interneuron connections in the developing cerebellar circuitry.
  • Further research into preminis could reveal new mechanisms of synaptic development and plasticity.