SPINA TYMPANICA MAJOR Meaning and
Definition
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Spina tympanica major is a Latin anatomical term that refers to a bony ridge present on the external surface of the temporal bone, in close proximity to the tympanic cavity or middle ear. The word "spina" translates to "spine" or "ridge," while "tympanica" pertains to the tympanic or middle ear region, and "major" denotes its size or prominence.
The spina tympanica major is a distinctive structure found in the temporal bone, specifically located anterior to the external auditory meatus or ear canal. It is characterized by a prominent, elongated ridge that runs from the zygomatic process of the temporal bone to the spine of the sphenoid bone. This bony ridge helps to form the anterior boundary of the external acoustic meatus, contributing to the overall structure and shape of the temporal bone.
The spina tympanica major serves as a landmark for various anatomical structures, including the mandibular fossa, which is the site of articulation between the mandible or lower jawbone and the temporal bone. Additionally, it provides attachment points for ligaments and muscles involved in the movement and stabilization of the jaw. This anatomical feature is essential for the correct positioning and functioning of the middle ear.
Overall, the spina tympanica major is a key reference point in the study and understanding of the temporal bone's anatomy, particularly its relation to the middle ear and surrounding structures.
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The anterior edge of the notch of Rivinus, or incisura tympanica.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for SPINA TYMPANICA MAJOR
