Eye muscles Flashcards
What do the intrinsic muscles of the eye control?
Pupil diameter
Lens curvature
What do the extrinsic muscles of the eye control?
Movement of the eye
Which cranial nerves supply the eyes?
II - Optic
III - Occulomotor
IV - Trochlear
VI - Abducent
What are the extrinsic muscles of the eye?
Medial Rectus
Superior Rectus
Inferior Rectus
Lateral Rectus
Superior Oblique
Inferior Oblique
What is the action of the medial rectus?
Adduction
What is the action of the lateral rectus?
Abduction
What is the action of the superior rectus?
Elevation, adduction, intorsion
What is the action of the inferior rectus?
Depression, adduction, extorsion
What is the action of the superior oblique?
Intorsion, depression, abduction
What is the action of the inferior oblique?
Extorsion, elevation, abduction
What is strabismus?
Abnormal alignment of the eyes (squint eyes)
What is the name for strabismus involving convergence?
Intropia
What is the name for strabismus involving divergence?
Exotropia
What are the intrinsic muscles of the eye?
Ciliaris
Constrictor pupillae
Dilator pupillae
What is the function of the ciliaris muscle?
Changes the shape of the lens
