Ocular Motility Flashcards
What is ocular motility?
Ocular motility refers to the movement of the eyes and the muscles that control these movements.
True or False: Ocular motility only involves horizontal movements.
False
Name the six extraocular muscles responsible for eye movement.
Superior rectus, inferior rectus, medial rectus, lateral rectus, superior oblique, inferior oblique.
What is the primary function of the medial rectus muscle?
To adduct the eye.
Fill in the blank: The _____ reflex involves the coordination of eye movements with head movements.
vestibulo-ocular
Which cranial nerve controls the superior oblique muscle?
Trochlear nerve (CN IV).
True or False: The lateral rectus muscle is innervated by the abducens nerve.
True
What type of eye movement is used to track a moving object?
Pursuit movement.
What is the term for the rapid movement of the eyes between fixation points?
Saccade.
Which nerve is responsible for innervating the majority of the extraocular muscles?
Oculomotor nerve (CN III).
What is the role of the inferior oblique muscle?
To elevate and abduct the eye.
Fill in the blank: Abnormal ocular motility can lead to _____ vision.
double
True or False: Ocular motility assessment is not important in neurological examinations.
False
What is the purpose of eye convergence?
To allow for binocular vision when focusing on near objects.
Which condition is characterized by the inability to move the eyes in a coordinated manner?
Strabismus.
What is the term for involuntary eye movements that can affect vision?
Nystagmus.
What type of eye movement is primarily used when reading?
Saccadic movements.
Fill in the blank: The _____ system integrates sensory input to coordinate eye movements.
central nervous
What is the effect of a lesion in the abducens nerve?
It can cause an inability to abduct the affected eye.
Which eye movement allows for the stabilization of the visual field during head movements?
Vestibulo-ocular reflex.
True or False: All extraocular muscles are responsible for moving the eye in the same direction.
False
What is the primary function of the superior rectus muscle?
To elevate the eye.
What is the main function of the inferior rectus muscle?
To depress the eye.
Fill in the blank: The _____ test is used to assess ocular motility.
Hirschberg
What is the name of the condition where the eyes do not align properly?
Strabismus.
Which cranial nerve is affected in a patient with ptosis and eye adduction issues?
Oculomotor nerve (CN III).
