Eye Model
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30 questions
| 🇬🇧 | 🇬🇧 |
| Based on the picture shown above, which extraocular muscle is affected? | Right lateral rectus muscle |
| Lateral rectus muscle is innervated by the ________. a) Trochlear nerve b)Abducens nerve c)Oculomotor nerve | Abducens nerve |
| In dextroversion, which muscles are the yoked muscle? | Right lateral rectus muscle and left medial rectus muscle |
| Which extraocular muscle adduct the eye? a) Inferior rectus b) Inferior oblique c) Superior oblique d) Lateral rectus | Inferior rectus |
| Which muscles are involved? | Right inferior rectus muscle and left superior oblique muscle |
| Based on the picture shown above, which extraocular muscle is affected? | Right lateral rectus muscle |
| The origin of four rectus muscles | Annulus of Zinn |
| ______ muscle elevates the upper eyelid. a) Superior rectus b) Superior oblique c) Levator palpebrae superioris | Levator palpebrae superioris |
| All six extraocular muscles attached to the iris. a)True b)False | False. All six extraocular muscles attached to the sclera |
| Oculomotor nerve (cranial nerve III) controls these muscles , EXCEPT : a) Medial rectus muscle b) Lateral rectus muscle c) Superior rectus muscle d) Inferior rectus muscle | Lateral rectus muscle |
| The inferior oblique muscle is the only muscle that originates from the anterior orbit. True False | True |
| The diagram above shows a patient with ptosis. Which extraocular muscle damage causes the ptosis observed above? | Paralysis of levator palpebrae superioris muscle. Ptosis can also cause by oculomotor nerve damage when there is a lesion found in cranial nerve III. |
| Which nerve palsy will result in diplopia? a) Oculomotor nerve b) Trochlear nerve c) Abducens nerve | Trochlear nerve |
| When eye adducts, elevating and depressing ability of vertical rectus muscle increases. True False | False. When eye adducts, the vertical rectus muscle becomes perpendicular to the sagittal axis, then contraction of the superior or inferior rectus muscle will cause no vertical movement. |
| What is the main arterial blood supply for the eye? | Ophthalmic artery |
| The bony orbit appears to be in ________ shape a) Square b) Pyramid c) Circle d) Star | Pyramid its base opening anteriorly onto the face, while the apex is pointed posteromedially |
| The function of optokinetic is to hold images of world steady on the retina with rapid,brief head rotations. True False | False. Optokinetic holds images of world steady on the retina during sustained rotations. |