lateral rectus
Học thuậtThân thiện
Definition
Noun: - The ocular muscle whose contraction turns the eyeball outward: The lateral rectus is one of the six extraocular muscles that control the movement of the human eye. Specifically, its primary function is to abduct the eye, meaning it pulls the eyeball laterally, away from the nose.
Usage
The term "lateral rectus" is used in anatomical, medical, and optometric contexts to refer to this specific muscle. - The surgeon carefully isolated the lateral rectus muscle during the procedure. - Weakness in the lateral rectus can cause esotropia, a form of strabismus where the eye turns inward.
Advanced Usage
- Lateral rectus palsy/paralysis: A condition where the muscle is paralyzed, often due to damage to the abducens nerve (cranial nerve VI), which innervates it.
- The patient's lateral rectus palsy resulted in double vision when looking to the left.
Variants and Related Words
- Lateral rectus muscle: The full anatomical term.
- Abducens nerve (Cranial Nerve VI): The nerve that supplies the lateral rectus muscle.
- Medial rectus: The antagonistic muscle that turns the eyeball inward (adduction).
Synonyms
- Abducens oculi (an older, less common term).
- External rectus muscle (an alternative name).
Related Phrases
- Lateral rectus recession: A surgical procedure to weaken the muscle by moving its attachment point posteriorly, often used to treat strabismus.
- The ophthalmologist recommended a lateral rectus recession to correct the exotropia.
Noun
- the ocular muscle whose contraction turns the eyeball outward