rectus superior
Học thuậtThân thiện
Definition
Noun: - The ocular muscle whose contraction turns the eyeball upward and medially: The rectus superior is one of the six extraocular muscles that control the movement of the eye. Specifically, its primary action is to elevate (turn upward) and adduct (turn medially, toward the nose) the eyeball.
Usage
The term is used in anatomical, medical, and ophthalmological contexts to refer to this specific muscle. - The surgeon carefully isolated the *rectus superior during the procedure.* - Weakness in the *rectus superior can cause limited upward gaze.*
Advanced Usage
- "Superior rectus": This is a common alternative name for the same muscle. The word order is often interchangeable in medical terminology.
- The superior rectus and the levator palpebrae superioris are both innervated by the oculomotor nerve.
Variants and Related Words
- Superior rectus: The more frequently used term, synonymous with .
- Extraocular muscles: The group of six muscles that control eye movements, which includes the .
- Oculomotor nerve (Cranial Nerve III): The primary nerve that supplies and controls the .
Synonyms
- Superior rectus muscle: The full anatomical name.
- SR (abbreviation): A common clinical abbreviation used in medical notes.
Related Terms (Not Phrasal Verbs)
- Rectus inferior: The ocular muscle that turns the eyeball downward and medially.
- Rectus medialis / Medial rectus: The ocular muscle that adducts the eyeball (turns it toward the nose).
- Rectus lateralis / Lateral rectus: The ocular muscle that abducts the eyeball (turns it away from the nose).
Noun
- the ocular muscle whose contraction turns the eyeball upward and medially