Hair cells are the sensory receptors of both the auditory system and the vestibular system in the ears of all vertebrates, and in the lateral line organ of fishes. Through mechanotransduction , hair cells detect movement in their environment.

The cochlear hair cells in humans consist of one row of inner hair cells and three rows of outer hair cells (see Figure 13.4). The inner hair cells are the actual sensory receptors, and 95% of the fibers of the auditory nerve that project to the brain arise from this subpopulation.

5 hours ago · The cells were exposed to 440 Hz (A above middle C) and 14 KHz (near the highest pitch many people can detect). They observed changes in the cells’ behavior between cells exposed to these sounds ...

Sep 7, 2017 · The ear is the organ found in animals which is designed to perceive sounds. Most animals have some sort of ear to perceive sounds, which are actually high-frequency vibrations caused by the movement of objects in the environment.

In hearing, stereocilia transform the mechanical energy of sound waves into electrical signals for the hair cells, which ultimately leads to an excitation of the auditory nerve. Stereocilia are composed of cytoplasm with embedded bundles of cross-linked actin filaments.

Mar 6, 2023 · The ear divides into three distinct parts: the outer ear, middle ear, and inner ear. The external ear includes the auricle (pinna) and the external ear canal; both have a lining keratinized stratified squamous epithelium. [1]

The sensory cells of the inner ear, called hair cells, do not regenerate spontaneously and therefore, hair cell loss and subsequent hearing loss are permanent in humans. Conversely, functional hair cell regeneration can be observed in non …

Apr 3, 2025 · The results showed that cells in the inner ear, which are crucial for hearing, develop from two main types of stem cells. This knowledge could lead to new treatments for hearing loss.

Dec 1, 2024 · Several recent studies have performed single-cell transcriptomics on human inner ear organoids to interrogate cellular heterogeneity, reveal the developmental trajectories of sensory lineages and compare organoid-derived vesicles to the developing human inner ear.

Mar 4, 2025 · The results showed that cells in the inner ear, which are crucial for hearing, develop from two main types of stem cells. This knowledge could lead to new treatments for hearing loss. “Tracing the origin and development of cells gives us a unique opportunity to understand the basic mechanisms behind hearing loss,” says Emma Andersson.