Cranial Nerves Flashcards
What does II do?
visual signals fro retina to occipital lobe of brain
Menace response
II for visual cue; VII for blink response
PLR response
II for visual cue; III for pupil constriction
What does III do?
Motor to extraocular muscles (dorsal, ventral and medial rectus) and for pupil constriction
What does IV do?
Trochlear nerve- motor to dorsal oblique extraocular muscle and rolls globe medially
What does V do?
Trigeminal nerve;
Maxillary- Motor- Cheeks, lower eye lid, nasal mucosa, upper lip, upper teeth and palate.
Mandibular-
Sensory: anterior 2/3 tongue, skin over mandible and lower teeth, cornea
Motor: muscles of mastication.
Ophthalmic- motor- Scalp, forehead and nose.
Palpebral response
V for blink for medial canthus and VII for motor
What does VI do?
Abducens- motor to lateral rectus extraocular muscle and retractor bulbi
What does VII do?
Facial nerve
motor to muscles of facial expression and sensory to medial pinna; taste to rostral tongue
What does VIII do?
Vestibulocochlear Nerve
Sensory input for hearing and head position
What does IX do?
Glossopharyngeal Nerve;
motor and sensory innervation to pharyn for swallowing; senosory for taste for the caudal tongue; can test with gag reflex
What does X do?
Vagus nerve
innervates the larynx, eosphagus, and pharynx; assess for megaesophagus and regurigiation
What does the XI do?
Spinal Acessory Nerve;
innervates cranial cervical muscles
What does XII do?
hypoglossal nerve;
provides motor the tongue
What is idiopathic trigeminal neuritis?
Syndrome seen in dogs with peracute onset of dropped jaw and inability to close the mouth; treat with supportive care and hand feeding of soft food
