# Which of the following group of muscles is involved in elevation of the eyeball?
A. Superior rectus and inferior oblique
B. Inferior rectus and Superior oblique
C. Superior Oblique and superior rectus
D. Inferior oblique and Inferior rectus
The correct answer is : A. Superior rectus and inferior oblique
Action of Individual Muscles:
Levator Palpebrae superioris - Elevation of upper eyelid
Superior rectus - Upward rotation, medial rotation and intorsion
Inferior rectus- Downward rotation, medial rotation and extorsion
Medial rectus- Medial rotation
Lateral rectus- Lateral rotation
Superior oblique- Downward rotation, lateral rotation and intorsion
Inferior oblique- Upward rotation and extorsion
Single movements of eyeball and muscles involved:
Upward rotation (Elevation)- Superior rectus and inferior oblique
Downward rotation (Depression)- Inferior rectus and Superior oblique
Medial rotation (Adduction)- Medial rectus, Superior rectus and Inferior rectus
Lateral rotation (Abduction)- Lateral rectus, Superior oblique and inferior oblique
Intorsion- Superior rectus and superior oblique
Extorsion- Inferior oblique and Inferior rectus
No comments:
Post a Comment
Add Your Comments or Feedback Here