The helicotrema (from Greek: ἕλιξ [helix] meaning coil and τρη̂μα [trēma] meaning hole) is the part of the cochlear labyrinth where the scala tympani and the scala vestibuli meet.

The hair cells near this area best detect low frequency sounds.

[1][2] It is the main component of the cochlear apex.

[3] The hair cells near this area best detect low frequency sounds.

[1][4] The hair cells near the helicotrema are at higher risk of acoustic trauma than those in most other parts of the cochlea.