52 Questions
Which cranial nerve supplies the superior oblique muscle?
CN IV
Which cranial nerve supplies the lateral rectus muscle?
CN VI
Which cranial nerve is responsible for the movement of the eyelid?
CN VII
Which cranial nerve is responsible for the secretion of lacrimal fluid?
CN VII
Which division of the trigeminal nerve exits the cranium through the superior orbital fissure?
Ophthalmic / V1
Which division of the trigeminal nerve exits the cranium through the foramen rotundum?
Maxillary / V2
Which division of the trigeminal nerve exits the cranium through the foramen ovale?
Mandibular / V3
Which nerve supplies sensory innervation to the lacrimal gland, conjunctiva, and upper eyelid?
Lacrimal nerve
Which nerve supplies sensory innervation to the eye, bridge of nose, and mucous membranes of the paranasal sinuses?
Nasociliary nerve
Which nerve supplies sensory innervation to the upper eyelid, conjunctiva, forehead, and scalp?
Frontal nerve
Which paranasal sinus is most likely to become infected?
Maxillary
What is the primary function of the nose?
To filter dust entering the respiratory system
Which nerve supplies the olfactory receptors in the nasal cavity?
Olfactory nerve (CN I)
Which bone is not part of the orbit?
Palatine
Which chamber of the eye contains the largest amount of fluid?
Vitreous chamber
Which nerve carries visual impulses from the retina to the brain?
Optic nerve (CN II)
Which gland, when swollen, can impact the optic nerve and cause disturbances in vision?
Pituitary gland
Which cranial nerve supplies the superior oblique muscle of the eye?
Trochlear nerve (CN IV)
Which cranial nerve supplies the muscles that move the eye in all directions except superior oblique and lateral rectus?
Oculomotor nerve (CN III)
Which nerve supplies the lateral rectus muscle of the eye?
Abducens nerve (CN VI)
Which bone of the skull is the attachment point for the upper row of teeth?
Maxilla
The basilar artery bifurcates into which branches of the cerebral arterial circle?
Anterior communicating artery
Which bone of the skull is the attachment point for the lower row of teeth?
Mandible
Which artery bifurcates into branches of the cerebral arterial circle?
Basilar artery
Which cranial nerve is responsible for the movement of the tongue?
Hypoglossal nerve
Which division of the trigeminal nerve supplies sensory innervation to the lower jaw and lower teeth?
Mandibular division
Which bone is responsible for increasing the surface area of the nasal cavity?
Turban
Which nerve is responsible for the sense of smell?
Olfactory nerve
From where does the olfactory nerve arise?
Cerebrum
Which cranial nerves arise directly from the cerebrum?
Olfactory nerve and optic nerve
Which cranial nerve is responsible for the movement of the extra ocular muscles?
Cranial Nerve VI
What is the primary function of the sinuses?
To lighten the skull
Which chamber of the eye is full of aqueous fluid?
Anterior chamber
What condition is caused by a build-up of pressure in the vitreous chamber of the eye?
Glaucoma
Which sinus is most likely to become infected?
Maxillary sinus
Which nerve supplies sensory innervation to the eye, bridge of nose, and mucous membranes of the paranasal sinuses?
Trigeminal nerve
Where does the information from the retina of the eye get processed?
Occipital lobe
Which bone is not part of the orbit?
Temporal
What is the main function of the posterior cerebral arteries within the cerebral arterial circle?
To supply blood to specific branches within the cerebral arterial circle
Which arteries are bifurcating within the cerebral arterial circle?
Posterior cerebral arteries
What is the main function of the nose?
To filter the air from the external environment
Which nerves supply sensory innervation to the external nose?
Trigeminal nerves
Which part of the eye is responsible for flipping the visual input the right way around?
The visual cortex in the occipital lobe
Which structure in the eye allows us to perceive depth and calculate distance?
The retina
What happens when there is a lesion in the optic chiasm?
Peripheral vision is disturbed
What is the function of the optic nerve?
Carrying visual impulses from the retina to the brain
Which gland, when swollen, can cause disturbances in visual fields?
Pituitary gland
Where does the pituitary gland sit in the skull?
Sphenoid bone
What happens if the pituitary gland swells or increases in size?
It expands upwards
Which cranial nerve supplies sensory innervation to the upper eyelid, conjunctiva, forehead, and scalp?
Trigeminal nerve
What is the primary function of the pituitary gland?
Production of hormones
Which bone of the skull forms a protective enclosure for the pituitary gland?
Sphenoid bone
Study Notes
Anatomy of the Nasal Cavity and Orbit
- The nasal cavity has the primary function of filtering dust entering the respiratory system.
- The blood supply to the nasal cavity comes from branches of the ophthalmic and maxillary arteries, and the facial vein.
- The nerve supply to the nasal cavity includes the olfactory nerve (CN I), the ophthalmic nerve (V1), and the maxillary nerve (V2).
- The nasal cavity is comprised of bones and cartilage, with three projections on the lateral wall: superior conchae, middle conchae, and inferior conchae.
- Olfaction is fulfilled by the olfactory nerve, which arises from the cerebrum and exits via the cribriform plate.
- Paranasal sinuses are air-filled extensions of the nasal cavity that can produce mucus and drain into the nasal cavity through various ducts.
- The orbit is composed of seven bones and houses the eye.
- The eye is divided into three chambers: anterior, posterior, and vitreous chamber.
- Visual information received by the retina is carried through the optic nerve (CN II), and the crossing of visual fields between the eyes is important for binocular vision.
- The extraocular muscles are responsible for the movements of the eye, which occur around three axes: vertical, transverse, and anteroposterior.
- The oculomotor nerve (CN III) supplies most of the extraocular muscles, while the trochlear nerve (CN IV) supplies the superior oblique muscle, and the abducens nerve (CN VI) supplies the lateral rectus muscle.
- The lacrimal gland secretes lacrimal fluid, which lubricates, protects, and provides nutrients for the eye. It receives sensory and autonomic innervation.
Test your knowledge of the nasal cavity and orbit with this quiz. Learn about the functions and anatomy of these important structures while solving a riddle. Join now at slido.com #3242461.
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