The spiral (cochlear) ganglion is a group of neuron cell bodies in the modiolus, the conical central axis of the cochlea. These bipolar neurons innervate the hair cells of the organ of Corti.

In man, it is composed of 30 to 35,000 bipolar spiral ganglion neurons (SGNs) of two main types. Large and slightly myelinated type I neurons (accounting for more than 90%) are connected to inner hair cells; small and unmyelinated type II neurons are connected to outer hair cells.

Dec 14, 2020 · The spiral ganglion houses the cell bodies of the first order neurons (ganglion refers to a collection of cell bodies outside the central nervous system). These neurones receive information from hair cells in the Organ of Corti and travel within the osseous spiral lamina.

In response to a tone-burst presented at the CF, the temporal response of high-CF auditory nerve fibers (CF > 2 kHz, fibers that innervate the basal part of the cochlea) is characterized by a good synchronization at the beginning of the stimulation, an adaptation and a steady-state activity.

Aug 1, 2011 · The spiral ganglion neurons of the cochlea represent a defined and isolated population of primary sensory neurons of critical importance in the normal transmission of sound information to the brain, in both the normal hearing individual and the cochlear implant recipient.

Apr 16, 2018 · The cochlear spiral ganglion (SG) is formed by two populations of neurons, Type-I (AF-I, bipolar, and myelinated), and Type-II (AF-II, pseudounipolar, and unmyelinated) neurons which fibers innervate the organ of Corti (OC) inner …

Jan 20, 2025 · The spiral ganglion, also known as the cochlear ganglion, is an essential structure in the auditory system, playing a crucial role in hearing. It consists of a collection of nerve cells (ganglion cells) that transmit auditory information from the inner ear to the brain.

The cochlear ganglion is the sensory ganglion located within the spiral canal of the modiolus. It consists of bipolar cells that send fibers peripherally through the foramina nervosa to the spiral organ and centrally through the internal acoustic meatus to the cochlear nuclei of the brainstem (Dorland, 2011).

The spiral ganglion (Ganglion cochleare) “spirals” from the base of the modiolus to its midpoint. Dendrites of the ganglion cells form large afferent synapses at the basis of the inner hair cells; they use glutamate as the neurotransmitter.

Cochlear ganglion (a.k.a. spiral ganglion) is situated in a spiral canal within the bony modiolus, that forms the long axis of the cone-shaped cochlea. The ganglion comprises of cell bodies of afferent neurons (AF) whose dendrites transmit auditory information from the hair cells of the organ of Corti in the inner ear.