PETROSAL BONE Meaning and
Definition
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The petrosal bone is a dense, thick, pyramid-shaped bone located on the sides of the skull, forming a part of the temporal bone. It houses several important structures, such as the inner ear and parts of the auditory and vestibular systems. The term "petrosal" is derived from the Latin word "petrosus," meaning stony or rock-like, which accurately describes the bone's tough and unyielding nature.
Situated at the base of the skull, the petrosal bone is known for its complex anatomy and intricate architecture. It consists of various regions, including the petrous portion, which is the densest part of the temporal bone and contains the inner ear structures like the cochlea and semicircular canals. The petrosal bone also incorporates the mastoid portion, which projects posteriorly below the external auditory canal, and the tympanic portion, forming a part of the external auditory canal itself.
The petrosal bone plays an essential role in protecting vital structures like the auditory and vestibular systems. It forms a sturdy framework around the inner ear, safeguarding the delicate hearing organs from potential trauma and injury. Additionally, it provides attachment sites for muscles involved in the movement of the jaw.
Overall, the petrosal bone is a critical component of the skull, contributing to both structural support and sensory functions. Its intricate design and robust nature make it an indispensable element for the preservation of auditory and vestibular function.
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The petrous portion of the temporal bone, in antenatal life, before it is joined to the other portions.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for PETROSAL BONE
- oetrosal bone
- letrosal bone
- -etrosal bone
- 0etrosal bone
- pwtrosal bone
- pstrosal bone
- pdtrosal bone
- prtrosal bone
- p4trosal bone
- p3trosal bone
- perrosal bone
- pefrosal bone
- pegrosal bone
- peyrosal bone
- pe6rosal bone
- pe5rosal bone
- peteosal bone
- petdosal bone
- petfosal bone
- pettosal bone
Etymology of PETROSAL BONE
The word "petrosal" is derived from the Latin word "petrosus" meaning "rocky" or "stony". It comes from the Latin noun "petra", meaning "rock". The term "petrosal bone" was coined because this bone, found in the inner ear of mammals, has a dense and hard rock-like appearance.
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