Cranial nerves Flashcards
What is the 1st cranial nerve? + general function
Olfactory, smell
What is the 2nd cranial nerve? + general function
Optic, vision
What is the 3rd cranial nerve? + general function
Oculomotor, moves eyeball, pupil, constriction and lens accommodation
What is the 4th cranial nerve? + general function
Trochlear, moves eyeball inferiorly and laterally
What is the 5th cranial nerve? + general function
Opthalmic, maxillary, mandibular
Motor to muscles of mastication, sensory to face, nose and mouth
What is the 6th cranial nerve? + general function
Abducent, moves eyeball laterally
What is the 7th cranial nerve? + general function
Facial nervus intermedius, motor to facial muscles, sense of taste
What is the 8th cranial nerve? + general function
Vestibularcochlear, balance and hearing
What is the 9th cranial nerve? + general function
Glossopharyngeal
Motor to stylopharyngeas, sensory to tongue and pharynx
What is the 10th cranial nerve? + general function
Vagus, motor to palate, pharynx and larynx
sensory to pharynx, larynx
What is the 11th cranial nerve? + general function
Spinal accessory, movement of head and shoulder
What is the 12th cranial nerve? + general function
Hypoglossal, motor to tongue muscles
Which cranial nerves are just sensory?
I- Olfactory
II- Optic
VIII- Vestibulocochlear
Which cranial nerves are just motor?
III- Oculomotor IV- Trochlear VI- Abducent XI- Spinal accessory XII- Hypoglossal
Which cranial nerves have their nucleus in pons?
Motor of V, VI, VII
Which cranial nerves have their nucleus in medulla?
IX, X and XII
What muscles does the spinal accessory (XI) nerve control?
Sternocleidomastoid and trapezius
What cranial nerves exit via the foramen magnum?
Spinal accessory (CN XI)
What cranial nerves exit through the jugular foramen?
CN IX, X and XI
Which cranial nerves pass through the superior orbital fissures?
Oculomotor (CNIII), trochlear (CN IV), abducent (CN VI) and ophthalmic (V1)
What cranial nerves pass through the optic canal?
Optic (CN II)
What cranial nerve passes through holes in the cribiform plate?
Olfactory (CN I)
Which cranial nerve passes through the foramen rotundum?
V2 (maxillary)
Which cranial nerve passes through the foramen ovale?
Mandibular (V3)
What cranial nerves pass through the internal auditory meatus?
Facial (VII) and vestibulocochlear (VIII)
What does the opthalmic nerve split into?
Frontal
Lacrimal
Nasocilliary
What does the lacrimal nerve supply?
Innervation to lateral upper eyelid and conjunctiva
Also carries PNS neurones from pterygopalatine ganglion to lacrimal gland
What reflex tests the lacrimal nerve?
Blink reflex
What does the frontal nerve supply?
Skin of forehead and scalp
What does the nasociliary nerve supply?
Two branches-
Anterior ethmoidal supplies ethmoidal air sinuses
Infratrochlear supplies skin and mucous membranes of nose and conjunctiva
Also gives off ciliary nerves to eyeball
Which nerves arise from the lateral angle between pons and medulla?
Facial and vestibulocochlear
Which nerves emerge from between pons and the pyramid?
Abducent
Which nerve is the only one that arises from the dorsal surface of the brainstem?
Trochlear
What nerve will be affected by a pituitary tumour?
Optic nerve-> visual field defects
