Muscles of the Eye Flashcards
the three nerves the inervate the muscles that move the eye:
- Oculomotor (CN3)
- Trochlear (CN4)
- Adbucens (CN6)
which muscles of the eye orginigate from the fascia around the optic nerve?
the rectus muscles
- medial
- lateral
- superior
- inferior
medial rectus dose what movement?
- moves the eye TOWARDS THE NOSE
- adduction of the eye
lateral rectus contraction causes what movement?
- moves the eye ways from the midline
- abduction of the eye
superior rectus causes?
-elivation ..look upward
inferior rectus causes?
-depression of the eye
oblique muscles cause which type of movements?
rotational movements
-attach on the sides of the eye
which oblique muscles has a small pulley?
the superior oblique
what is the functions of the pulley of the superior oblique muscle?
- allows the muscle to completely changer dirrections
- change its angle of pull
what is the pulley of the superior oblique muscle called?
- throchlea
- “stirrup”
what movement is causes by contractions of the superior oblique muscle?
-medial rotation of the eye
contraction of the inferior obliques cause which movement?
lateral rotation of the eye
which nerve inervates the superior oblique muscle?
the trochlear nerve (CN IV)
which nerve inervates the lateral rectus?
Abducens Nerve (CN VI)
which muscles does the oculomotor nerve inervate?
- superior retus
- medial rectus
- inferior rectus
- inferior oblique
- Levator palpebrae superioris
