1) The roof of the nasal cavity is formed by the following structures except: a) Nasal bone b) Frontal bone c) Cribiform plate of the ethmoid bone d) Sphenoid bone e) Palatine process of the maxillar bone 2) Which of the following is the largest paranasal sinus and the first one to develop in a child ? a) Maxillary b) Frontal c) Sphenoidal d) Ethmoidal e) Orbital 3) Sinusitis in which of the following paranasal sinuses is most likely to affect the optic nerve ? a) Maxillary b) Frontal c) Sphenoid d) Ethmodial e) Orbital 4) A patient with a skull fracture that collapses the right superior orbital fissure could present with : a) Anesthesia of the lower half of the face  b) Bell's palsy c) Anesthesia of the mandibular area of the face d) Left Horner's syndrome e) Diplopia 5) which of the following structures makes an impression in the posterior cranial fossa? a) abducens nerve  b) Facial nerve c) Internal carotid artery d) Deep petrosal nerve e) Middle meningeal artery 6) The optic canal transmits which of the following structures? a) Optic nerve and ophthalmic artery b) Oculomotor nerve and ophthalmic vein c) C. Trochlear nerve and ophthalmic artery d) Abducent nerve and superior ophthalmic vein 7) The floor of the orbit is formed mainly by which bone? a) Frontal bone b) Maxilla c) Sphenoid bone d) thmoid bone 8) The annulus of Zinn (common tendinous ring) gives origin to all of the following muscles except: a) Medial rectus b) Inferior oblique c) Superior rectus d) Lateral rectus 9) Which of the following statements about orbital volume and contents is true a) The eyeball occupies about 90% of the orbital volume b) The orbit contains no fat tissue c) The orbit is shaped like a pyramid with its apex posteriorly d) The orbital apex lies anterior to the globe 10) The length of the adult human orbit (from anterior rim to apex) is approximately: a) 20mm b) 30mm c) 40mm d) 50mm 11) The lacrimal gland is located in which part of the orbit? a) Superomedial b) Superolateral c) Inferomedial d) Inferolateral

Orbit anatomy

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