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The helicotrema is located in the inner ear, specifically at the apex of the cochlea. It is the small opening that connects the scala tympani and scala vestibuli, allowing for the movement of fluid within the cochlea. This structure plays a role in the transmission of sound waves along the cochlear duct.
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Where are low frequency sounds detected in the ear?
Low frequency sounds are detected in the ear by the hair cells located in the cochlea, specifically in the apex or helicotrema region. These hair cells are responsible for converting sound vibrations into electrical signals that are then transmitted to the brain via the auditory nerve.
What inner ear structure picks up vibrations of fluid in the cochlea and transmits them as sensory impluse to the brain?
Scala tympani is one of the perilymph-filled cavities in the cochlear labyrinth of the human ear. It is separated from the scala media by the basilar membrane, and it extends from the round window to the helicotrema, where it continues as scala vestibuli.The purpose of the perilymph-filled scala tympani and scala vestibuli is to transduce the movement of air that causes the tympanic membrane and the ossicles to vibrate, to movement of liquid and the basilar membrane. This movement is conveyed to the organ of Cortiinside the scala media, composed of hair cells attached to the basilar membrane and their stereo cilia embedded in the tectorial membrane. The movement of the basilar membrane compared to the tectorial membrane causes the sterocilia to bend. They then depolarise and send impulses to the brain via the cochlear nerve. This produces the sensation of sound.
