superior rectus

Thân thiện

The superior rectus muscle lifts the eye upward.

Definition

1. 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.

Học thuật

Noun

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

Từ đồng nghĩa

• superior rectus muscle
• rectus superior