SPINA TROCHLEARIS Meaning and
Definition
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The term "spina trochlearis" refers to a bony prominence located on the posterior aspect of the sphenoid bone within the human skull. It is commonly known as the "Sphenoidal Spine" or "Sphenoid Rostrum" due to its distinct shape resembling the beak of a bird. The spina trochlearis is situated in the midline region, projecting downward from the floor of the middle cranial fossa towards the nasopharyngeal region.
Anatomically, the spina trochlearis serves as an attachment site for several important structures. It functions as a point of origin for the inferior sphenoidal constrictor muscle, which contributes to the closure of the nasal cavity during swallowing and acts as a protective barrier while sneezing or coughing. Additionally, it acts as an insertion point for part of the levator veli palatini muscle, which aids in the movement of the soft palate during swallowing and speaking.
The prominence of the spina trochlearis plays a significant role in the spatial relations between the structures of the skull, as it serves as a reference point in various clinical and surgical contexts. Furthermore, due to its unique shape and location, it can often be used as a landmark or reference point during cranial imaging examinations and surgical interventions.
Overall, the spina trochlearis is a notable anatomical feature within the human skull, serving as an attachment site for various important muscles and providing a crucial reference point in clinical and surgical settings.
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Trochlear spine, a spicule of bone arising from the edge of the fovea trochlearis, giving attachment to the pulley of the superior oblique muscle of the eyeball.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for SPINA TROCHLEARIS
- apina trochlearis
- zpina trochlearis
- xpina trochlearis
- dpina trochlearis
- epina trochlearis
- wpina trochlearis
- soina trochlearis
- slina trochlearis
- s-ina trochlearis
- s0ina trochlearis
- spuna trochlearis
- spjna trochlearis
- spkna trochlearis
- spona trochlearis
- sp9na trochlearis
- sp8na trochlearis
- spiba trochlearis
- spima trochlearis
- spija trochlearis
- spiha trochlearis
Etymology of SPINA TROCHLEARIS
The word "spina trochlearis" originates from Latin.
- "Spina" means "thorn" or "spine" in Latin.
- "Trochlearis" comes from the Latin word "trochlea" which means "pulley" or "sheave".
When combined, "spina trochlearis" translates to "trochlear spine". This term is used in anatomical context to refer to a small bony prominence on the posterior aspect of the petrous part of the temporal bone in the human skull.
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