superior rectus
Definition
- Noun:
- The ocular muscle whose contraction turns the eyeball upward and medially: The "superior rectus" is one of the six extraocular muscles that control the movement of the eye. Specifically, its primary action is to elevate (turn upward) the eyeball, with a secondary action of rotating it medially (inward, toward the nose).
Usage Examples
- Noun:
- The superior rectus muscle is innervated by the oculomotor nerve.
- Damage to the superior rectus can cause an inability to look upward with that eye.
- During the examination, the doctor tested the function of the patient's superior rectus.
Advanced Usage
- "Superior rectus palsy": A condition involving weakness or paralysis of this muscle, often leading to double vision (diplopia) and a characteristic head tilt to compensate.
- The patient presented with a head tilt, a sign of possible superior rectus palsy.
Variants and Related Words
- Superior rectus muscle: The full anatomical term.
- Extraocular muscles: The group of six muscles, including the superior rectus, that control eye movement.
- Inferior rectus: The muscle that turns the eyeball downward.
- Medial rectus: The muscle that turns the eyeball inward (adduction).
- Lateral rectus: The muscle that turns the eyeball outward (abduction).
Synonyms
- Superior rectus muscle: The most precise synonym.
- SR: A common medical abbreviation used in clinical notes and diagrams.
Related Phrases
- "Action of the superior rectus": Refers to its primary and secondary functions in moving the eye.
- The action of the superior rectus is elevation and intorsion of the eye.
Noun
-
the ocular muscle whose contraction turns the eyeball upward and medially
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