Muscles of the eye Flashcards Preview

anatomy of the head > Muscles of the eye > Flashcards

Flashcards in Muscles of the eye Deck (6)
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1
Q

How many muscles act on the eye

A

there are 7 muscles

Levator Palpebrae Superioris
4 recti muscles
2 oblique muscles

2
Q

Levator Palpebrae Superioris

PA
DA
N/S
A

A

Lesser wing of the sphenoid (anterior and superior to the optical canal

Tarsal plate and skin of the upper eyelid

Oculomotor nerve CN 3
- some deep layers are supplied by sympathetic nerve

3
Q

what are the 4 recti muscles

A

Superior, Inferior, Medial and Lateral Recti muscles

4
Q

the 4 recti muscles

PA
DA
N/S
A

A

Common Tendinous Ring - Fibrous cuff surrounding the optical canal and medial part of the SOF

Sclera just posterior to the cornea

Oculomotor nerve, expect for Lateral Rectus which is Abducent nerve (CN6)

  • Superior Rectus - Elevates, adducts and medially rotates the eye
  • Inferior Rectus - Depresses, adducts and laterally rotates the eye
  • Medial Rectus - adducts
  • Lateral Rectus abducts
5
Q

Superior Oblique muscle

PA
DA
N/S
A

A
  • Body of the sphenoid
  • Sclera, deep to the superior rectus
  • Trochlea nerve (CN4)
  • Abducts, depresses and medially rotates the eyeball
6
Q

Inferior Oblique muscle

PA
DA
N/S
A

A
  • Anterior part of the floor of the orbit
  • Sclera deep to the lateral rectus
  • Oculomotor nerve CN3
  • Abducts, elevates and laterally rotates the eye