Related Experiment Video
Updated: Aug 5, 2026
10:53
Optogenetic Stimulation of the Auditory Nerve
Published on: October 8, 2014
Triggered Calcium Lightning Programs Cochlear Development
Qiang Ma1, Hai-Peng Wang2, Yu-Meng Jiang1
1Department of Otorhinolaryngology Head & Neck Surgery Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai China.
Exploration (Beijing, China)
|July 28, 2026
Summary
Spontaneous calcium (Ca2+) lightning in cochlear supporting cells triggers widespread Ca2+ waves before hearing begins. This process is crucial for auditory system development and function.
Area of Science:
- Neuroscience
- Developmental Biology
- Auditory System Research
Background:
- Spontaneous calcium (Ca2+) waves are vital internal stimuli in the developing auditory system.
- The precise control and impact of these Ca2+ waves on auditory development remain unclear.
Purpose of the Study:
- To investigate the spatiotemporal dynamics of spontaneous Ca2+ waves in the early auditory system.
- To elucidate the mechanisms and functional significance of a novel Ca2+ phenomenon termed 'Ca2+ lightning' in cochlear development.
Main Methods:
- Utilized advanced imaging techniques to observe Ca2+ dynamics in cochlear supporting cells.
- Investigated the roles of specific ion channels (T-type Ca2+ channel, Ano1, Cx26) and genetic manipulation in Ca2+ wave propagation.
Main Results:
- Identified 'Ca2+ lightning,' an ultra-long, ultra-fast Ca2+ flash in inner supporting cells, preceding cochlear Ca2+ waves.
- Demonstrated that Ca2+ lightning propagation depends on the interplay of Cav3.2, Ano1, and Cx26.
- Showed that genetic deletion of these components disrupts Ca2+ lightning and impairs cochlear development.
Conclusions:
- Cochlear Ca2+ lightning and Ca2+ waves act in concert to orchestrate auditory system maturation before hearing onset.
- This Ca2+ signaling pathway is essential for the spatiotemporal development of the peripheral auditory system.
Related Concept Videos
01:22Hair 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.
01:15Auditory 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...
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
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.
01:27Feedback Regulation of Calcium Concentration
Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
01:25Long-term Potentiation
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...
Hebbian LTP
LTP can occur when presynaptic neurons...
01:35Long-term Potentiation
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.