Articles tagged with Cochlea
Researchers used trans-tympanic infrared laser stimulation of the cochlea to evoke reliable auditory-guided behaviour in awake animals, without invasive procedures or genetic modification. The study found that laser-evoked perception was processed through auditory pathways and could be controlled by changing radiant energy.
Researchers at Rice University develop a new way to model the cochlea's sound processing using graph signal processing, identifying broader functional relationships between sensory cells. The model, called GSP Cochlea, performs better in detecting signals in noise and may hold the key to personalized device settings for hearing aids.
Researchers found CI sound quality leads to a 32% variance in users' quality of life, while speech recognition has virtually no predictive power. The study challenges decades of clinical practice focusing on speech understanding in quiet environments.
Scientists have successfully kept a tiny sliver of the mammalian cochlea alive and functional outside the body for the first time. The innovation allowed them to capture the live biomechanics of the cochlea's remarkable auditory powers, including exceptional sensitivity and sharp frequency tuning.
Recent research reveals parvalbumin interneurons contribute to the tonotopic organization of the auditory cortex. PV inhibitory neurons are crucial for maintaining tonotopy strength. The study provides new insight into spatial encoding mechanisms of sensory information in the cortex.
Researchers adapted optical coherence tomography (OCT) to visualize tiny structures in the human inner ear, correlating fluid levels with a patient's degree of hearing loss. The findings may help clinicians diagnose and treat hearing loss more quickly and effectively.
Researchers at Waseda University developed a new technique using terahertz imaging to visualize the internal structure of the mouse cochlea with high resolution. The study successfully demonstrated the potential of THz imaging as a non-invasive diagnostic tool for auditory disorders and other medical applications.
Researchers have developed a non-invasive method to visualize the internal details of the mouse cochlea with micron-level spatial resolution using terahertz imaging. This technique has the potential to lead to a new diagnostic method for ear diseases and enable on-site diagnosis of hearing impairments.
A new study using OCT imaging revealed that nerve fibers in the inner ear adjust sound levels and compensate for hearing loss. In healthy mice, cochlear activity remained stable, but in mice with genetic hearing loss, cochlear function increased to enhance sensitivity.
A researcher has developed a novel drug delivery system that transports medications to the inner ear to prevent cisplatin-induced hearing loss. The system uses hydrogels and nanoparticles to deliver drugs that block calcium damage or protect hair cells, showing promising results in early-stage studies.
Researchers successfully increase inner ear synapses in young mice to produce supranormal hearing, supporting a hypothesis on the cause of hidden hearing loss in humans. The study suggests that preserving or increasing synapses may improve auditory processing and offer new treatment options for certain hearing disorders.
A research team has made a significant breakthrough in understanding the GPR156 receptor protein's role in maintaining auditory function. The study reveals that GPR156 exhibits sustained activity even without external stimuli, highlighting its potential as a target for treating congenital hearing impairments.
A study by Pierre Hakizimana at Linköping University found that the DC signal in the cochlea can provide an indication of ear health status, allowing the brain to decode faint sounds. The discovery may contribute to new research on diagnosing noise-induced hearing loss and has implications for preventing permanent damage from loud sounds.
Researchers developed a new method to deliver drugs into the inner ear, using the cerebrospinal fluid flow. This innovation restored hearing in deaf mice and may pave the way for gene therapy to treat human hearing loss.
Researchers found that deaf mice have nearly normal neural activity in the auditory system for two weeks after birth, suggesting a molecular mechanism for improved outcomes with early cochlear implants. This spontaneous activity helps train the brain to process sound before the ear canal opens.
Researchers found that bats lose their hearing in old age due to exposure to high noise levels in their colonies. The study suggests that bats may have evolved adaptations to cope with these noisy environments, which could provide insights into human age-related hearing loss.
Researchers generated cochlear avatars from stem cells, recreating hair cell function and transmitting electrical signals. This breakthrough enables the investigation of sensorineural hearing loss mechanisms and potential treatments.
A recent study published in Frontiers in Cell and Developmental Biology has found that the unique checkerboard pattern of cells in the organ of Corti is essential for proper hearing. The researchers discovered that when hair cells adhere to each other abnormally, it leads to apoptosis and a decrease in hair cell numbers, resulting in h...
A study by researchers at Linköping University and the Oregon Health and Science University has discovered that many cells in the inner ear react simultaneously to low-frequency sound, making it easier to experience these sounds. This new understanding may lead to improved cochlear implants for people with severe hearing impairments.
Genetic variants at 67 genomic regions were found to contribute to increased risk of age-related hearing loss. Visualized proteins reveal molecular components critical for sound conversion and transmission.
Researchers developed a flexible, self-powered device that translates sound waves into electrical signals, mimicking the inner ear's function. The device, implanted in a model ear, accurately recreated music files, offering a promising solution for treating hearing loss without batteries.
Researchers from USC Stem Cell discovered a latent regenerative potential in the inner ear's sensory cells. They found that epigenetic modifications regulate hair cell development and identified a key histone decoration, H3K4me1, that keeps supporting cells primed for transdifferentiation.
Researchers discovered that superoxide-producing cells in the inner ear cochlea increase with aging, noise damage, and ototoxic drugs, leading to age-related, noise-induced, and drug-induced hearing loss. Suppressing superoxide production or using Nox3 inhibitors may lead to new treatments for acquired hearing loss.
Scientists have discovered a novel deafness gene, TMEM43, linked to auditory neuropathy spectrum disorder (ANSD), a rare form of hearing loss that affects speech comprehension. The treatment involves cochlear implants, which have successfully restored speech discrimination in patients, offering new hope for those affected.
Researchers have developed an optical cochlear implant that uses light to stimulate auditory neurons, potentially improving frequency and intensity resolution. The new technology was tested on rodents and non-human primates, showing promise in enhancing speech comprehension.
Scientists at Uppsala University have created the first 3D map of the hearing nerve, tracing fine nerve threads and vibrating auditory organ to understand how frequencies are distributed. This new knowledge can lead to more effective cochlea implant treatments for the hearing-impaired.
A team of researchers generated a developmental map of the mouse inner ear's sound-sensing structure, providing insights into genetic programs that drive cell formation. The study sheds light on underlying causes of hearing loss linked to Ehlers-Danlos and Loeys-Dietz syndromes.
Scientists at Johns Hopkins Medicine identified two proteins, Activin A and follistatin, that precisely regulate hair cell birth in the mammalian inner ear. This discovery may lead to future therapies for restoring hearing in individuals with irreversible deafness.
Researchers discovered a link between cochlear shape and sex, enabling reliable sex determination from ancient remains. This breakthrough technique uses the cochlea's unique spiral shape to identify male and female individuals, including children and cases with DNA degradation.
Scientists at Linköping University found that the tectorial membrane stores calcium ions, which regulate sensory cell function. Temporary hearing loss occurs when the membrane's calcium ion concentration drops, but returns to normal once it replenishes.
A study published in PNAS reveals that the spatial organization of outer hair cells is crucial for amplifying and tuning sound. Researchers found that these cells can only produce high hearing sensitivity when arranged in their natural configuration with respect to surrounding structures.
A multi-disciplinary team will investigate the bush-cricket's ear and create 3D models to simulate its operation, producing theoretical circuitry for new acoustic sensors. This study aims to improve frequency analysis and sound capture in miniaturized devices.
Scientists at Rockefeller University have identified a molecule called Daple that helps construct and align the sensory hair bundles in the inner ear. These bundles are crucial for detecting sound, motion, and spatial orientation.
A Penn study reveals that ESRP1 gene mutations contribute to early hearing loss in humans, highlighting a critical molecular pathway involved in auditory development. The discovery opens up possibilities for new therapeutic approaches.
Researchers have developed a novel technique to deliver steroids directly into the cochlea, reducing hearing loss caused by cisplatin treatment in mice by 50%. This breakthrough has potential applications for treating various types of hearing loss and could also be used to deliver other drugs and therapies.
Researchers have identified two signaling molecules required for proper cochlea development. The study contributes to understanding of inner ear development and its potential goal of regenerating sensory hair cells, a key step toward reversing hearing loss in mammals.
Researchers found that nicotinamide riboside (NR) prevents noise-induced hearing loss by increasing the activity of protein sirtuin 3, which is critical for mitochondrial function. NR also showed promise in preventing long-term and short-term hearing loss, regardless of when it was administered.
Researchers discovered molecular brakes Hey1 and Hey2 regulate hair cell generation in the inner ear. Without them, cells are generated too early and disorganized, leading to hearing problems.
Researchers investigated how neurons in the inferior colliculus respond to paired sounds producing precedence-effect illusions. After local GABA application, responses to lagging stimuli were suppressed, providing a potential new approach for improving speech perception in patients with hearing aids under background noise.
Researchers investigated how neurons in the inferior colliculus respond to paired sounds producing precedence-effect illusions. Local gamma-aminobutyric acid application suppressed responses to lagging stimuli, providing a new approach for improving speech understanding in patients with hearing aids under background noise.
Researchers at Karolinska Institutet have identified a biological circadian clock in the cochlea that controls how well hearing damage heals. The discovery may lead to new treatment methods for hearing loss affecting up to 15% of the population.
Researchers at MIT have developed a new, low-power signal-processing chip that could lead to a wirelessly rechargeable cochlear implant without external hardware. The device uses the natural microphone of the middle ear and can be charged via an ordinary cell phone in two minutes.
New findings reveal how hair cells amplify sound at specific frequencies, a process missing in current hearing aids. The discovery may inspire the development of next-generation cochlear implants with location- and frequency-specific amplification.
A recent study used lentiviruses to deliver the Atoh1 gene to the cochlea of rats, resulting in increased transdifferentiation of supporting cells into hair cells. The treatment had no negative impact on auditory functions or hair cell numbers, suggesting a potential new approach for treating sensorineural hearing loss.
A study by Stanford researchers found that loud blasts can cause damage to the cochlea's hair cells and nerve cells, leading to permanent hearing loss. The researchers believe that treating the ear with certain medications after exposure to loud blasts may limit the damage.
Scientists discovered that the body's adaptation mechanism allows the cochlea to perform normally when exposed to noise stress. Constant exposure to loud noise can cause irreversible damage to high frequency hearing.
Researchers at Purdue University found that hearing impairment causes the inner ear's neurons to work harder in noisy environments. The study used chinchillas to measure physiological markers and confirmed a decrease in temporal coding of sounds with background noise.
Researchers have shown that gene therapy can induce the formation of extra sensory hair cells in young mice, but this approach has limitations in older animals. Introducing a specific gene called Atoh1 into the cochleae of young mice can produce electrical signals and connect with neurons.
Researchers developed a new cochlear implant with more electrodes and a thinner, more flexible wire, which can improve the quality of sound and preserve residual hearing. This innovation allows for more precise stimulation of the auditory nerve, resulting in better sound resolution.
Researchers at Tufts University have identified a hormone-like signaling system in the ear that helps protect against noise-induced hearing loss. The system, which mirrors the body's fight-or-flight response, works at lower intensity sounds than previously thought.
Researchers created a fast, low-power radio chip inspired by the human inner ear's cochlea, enabling wireless devices to receive cell phone, Internet, radio, and TV signals. The chip is faster than any human-designed spectrum analyzer and operates at much lower power.
A new study by University of Utah researchers reveals that tiny hair-like tubes atop hair cells in the ear act as flexoelectric motors to amplify sound mechanically. This discovery sheds light on how humans can hear very quiet sounds, and may also have implications for our sense of balance.
Scientists have created a biophysical methodology to retune functioning regions of the ear to recognize frequencies associated with damaged areas, which could remedy even substantial hearing loss. The method uses modifications that enable remapping of frequencies without losing auditory information.
A study at Vanderbilt University establishes a direct link between cochlea curvature and low-frequency hearing limit, providing new insights into the evolution of hearing. The research found that spiral-shaped cochleae are exclusive to mammals and have a significant effect on hearing ranges.
A new study contradicts a prevailing belief about otoacoustic emissions, revealing they travel through fluid in the inner ear rather than rippling along the basilar membrane. The findings offer insight into hearing loss and could lead to the development of tools to detect damage.
Researchers at Rutgers University have made a breakthrough in understanding the complex mechanisms behind cochlear implants. By studying the role of neurotrophin proteins, they may be able to develop a new generation of implants that can improve hearing for all patients, regardless of their level of impairment.
A research team has discovered a fundamental adaptive mechanism linking an animal's locomotion to its sensory systems. The study found that the dimensions of the three semicircular canals in the inner ear are linked to the type of movement produced by an animal's limbs.
Researchers developed a mathematical model of the cochlea that shows its spiral shape enhances low frequency sounds, increasing sensitivity by up to 20 decibels. This finding could lead to improved cochlear implants and better hearing outcomes.
Researchers have developed a new sensor based on a human organ that can detect specific frequencies of sound waves. The device, which is a microelectromechanical system, has three main benefits over existing artificial cochlea designs: mass production potential, comparable size, and efficiency.
Researchers at Emory University Health Sciences Center discovered the PCP pathway's role in shaping cochlea and hair cells. The study reveals that mutations in this pathway impact hearing and offers new insights into developing hearing restoration therapies.