Pronunciation: [spˈa͡ɪ͡əɹə͡l lˈamɪnə] (IPA) 
The correct spelling of the word "Spiral Lamina" is pronounced as /ˈspaɪrəl ləˈmaɪnə/. "Spiral" refers to a curve that moves away from a central point, while "Lamina" means a thin layer or plate. In the context of anatomy, the spiral lamina is a thin bony plate located in the inner ear that surrounds the cochlear duct. It is an essential component of the organ of Corti, which is responsible for hearing sensations.
The term "spiral lamina" refers to a specific anatomical structure found within the inner ear. It is a 200-word dictionary definition of this term:
The spiral lamina is a delicate, coiled bony plate located in the cochlea of the inner ear. It is an essential component of the organ of hearing and plays a crucial role in the transmission and processing of sound waves. The cochlea, shaped like a spiral, consists of three main structures: the outer bony labyrinth, the inner membranous labyrinth, and the spiral lamina.
The spiral lamina separates the scala media, also known as the cochlear duct, from the scala tympani. It extends along the entire length of the cochlea, coiling around the modiolus, which is a central pillar-like structure. This coiling arrangement gives rise to the distinctive spiral shape of the cochlea.
Within the spiral lamina, there are specialized cells called inner and outer hair cells. These hair cells are responsible for converting sound vibrations into electrical signals that can be interpreted by the brain. The spiral lamina also houses the auditory nerve fibers, which transmit these electrical signals from the hair cells to the brain.
Additionally, the spiral lamina provides support and protection to the delicate structures within the cochlea. It is composed of compact bone with numerous tiny canals and blood vessels running through it, ensuring a constant supply of nutrients and oxygen.
In summary, the spiral lamina is a bony structure within the cochlea that separates the scala media from the scala tympani. It houses the vital inner and outer hair cells involved in sound reception and the auditory nerve fibers responsible for transmitting sound signals to the brain.
The word "Spiral Lamina" is derived from two different sources.
1. Spiral: The term "spiral" is derived from the Latin word spiralis, which means "winding" or "coiling". It is related to the Latin word spira, which means "coil" or "twist". The Latin word spira itself was borrowed from the Greek word speira, meaning "a coil" or "a twist".
2. Lamina: The term "lamina" is derived from the Latin word lamina, which means "a thin plate" or "a sheet". It is related to the Latin verb lavare, meaning "to wash". This connection comes from the idea that a thin, flat object, like a sheet, can be washed or laid out flat.
