inferior rectus muscle

Thân thiện

The inferior rectus muscle helps the eye look downward.

Definition

1. Noun:
   • The ocular muscle whose contraction turns the eyeball down and medially: The inferior rectus muscle is one of the six extraocular muscles that control the movements of the eye. Specifically, its primary action is to depress (turn downward) the eyeball. A secondary action is to adduct the eye (turn it medially, toward the nose).

Usage Examples

• Noun:
  • Damage to the inferior rectus muscle can cause vertical double vision.
  • During the examination, the doctor tested the function of the inferior rectus muscle by asking the patient to look down and in.

Advanced Usage

• Clinical Context: In medical and anatomical discussions, the term is often used when diagnosing disorders of eye movement (strabismus) or planning surgical procedures.
  • The surgeon carefully isolated the inferior rectus muscle to perform a recession procedure.

Variants and Related Words

• Inferior rectus: A common shortened form of the full term "inferior rectus muscle."
• Extraocular muscles: The broader category of six muscles (including the superior, inferior, medial, and lateral rectus, and the superior and inferior oblique) that control eye movement.
• IR muscle: An occasional medical abbreviation.

Synonyms

• Inferior rectus: The primary synonym, often used interchangeably.
• Depressor of the eyeball: A descriptive, non-technical synonym referring to its function.

Related Terms and Phrases

• Rectus muscles: Refers to the group of four straight muscles of the eye (superior, inferior, medial, lateral).
• Ocular motility: The study or assessment of eye movements, involving all extraocular muscles including the inferior rectus.

Học thuật

Noun

1. the ocular muscle whose contraction turns the eyeball down and medially

Từ đồng nghĩa

• inferior rectus
• rectus inferior