extraocular muscle
C2/TechnicalSpecialized/Medical
Definition
Meaning
One of the six muscles that control the movement of the human eye.
In medical and anatomical contexts, specifically refers to the muscles outside the eyeball but within the orbit, responsible for eye movements. In broader scientific usage, may refer to similar muscles in other animals. Sometimes abbreviated as EOM.
Linguistics
Semantic Notes
Almost exclusively used in medical, anatomical, and ophthalmological contexts. The term is highly precise and not used metaphorically. It is a compound noun where 'extra-' means 'outside of' and 'ocular' refers to the eye.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Both varieties use the same technical term.
Connotations
Purely technical and clinical in both varieties.
Frequency
Equally low-frequency in both varieties, confined to specialist fields.
Vocabulary
Collocations
Grammar
Valency Patterns
The [nerve] innervates the extraocular muscle.A [palsy/weakness] affects the extraocular muscles.The [superior rectus] is an extraocular muscle.Vocabulary
Synonyms
Neutral
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Used in anatomy, physiology, medicine, and ophthalmology papers and textbooks.
Everyday
Not used. A layperson would say 'eye muscle'.
Technical
The primary context. Used in clinical notes, surgical plans, medical diagnoses, and research.
Examples
By Part of Speech
adjective
British English
- The extraocular muscle function was assessed.
- She has an extraocular muscle disorder.
American English
- The extraocular muscle function was tested.
- He underwent extraocular muscle surgery.
Examples
By CEFR Level
- The doctor checked the movement of his extraocular muscles.
- An injury can sometimes damage the extraocular muscles.
- Strabismus is often caused by a misalignment due to extraocular muscle imbalance.
- The neurosurgical approach carefully avoided the patient's extraocular muscles.
Learning
Memory Aids
Mnemonic
Think: EXTRA (outside) + OCULAR (eye) = muscles outside the eyeball.
Conceptual Metaphor
THE EYE IS A CAMERA/SATELLITE (controlled by external motors/actuators).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate as 'внеглазная мышца' (outside-eye muscle), which is awkward. The standard Russian medical term is 'глазодвигательная мышца' (eye-moving muscle) or 'наружная мышца глаза' (external muscle of the eye).
Common Mistakes
- Misspelling as 'extraoccular' (double c).
- Confusing 'extraocular' with 'intraocular' (inside the eye).
- Using in non-technical contexts where 'eye muscle' is sufficient.
Practice
Quiz
What is the primary function of the extraocular muscles?
FAQ
Frequently Asked Questions
Six: the superior, inferior, medial, and lateral rectus muscles, and the superior and inferior oblique muscles.
No, it is a technical medical term. In everyday conversation, people say 'eye muscle'.
'Extraocular' refers to structures outside the eyeball (like the muscles). 'Intraocular' refers to structures inside the eyeball (like pressure or lenses).
You cannot feel the muscles themselves, but you can feel the strain or fatigue from overusing them, for example, during prolonged reading.