clinician: cranial nerves Flashcards
What is the function of CN I
Olfaction
What is the function of CN II
Vision
What is the two functions of CN III
- Eye movement
- Parasympathetic innervation of the eye
What is the function of CN IV
Eye movement
What is two functions of CN V
- General sensation from head
- Motor to muscles of mastication
What is the function of CN VI
Eye movement
What is three functions of CN VII
- Motor to muscles of facial expression
- Taste
- Parasympathetic innervation salivary & lacrimal glands
What is two functions of CN VIII
- Hearing
- Vestibular sense
What is four functions of CN IX
- Taste
- General sensory & motor innervation of pharynx
- Parasympathetic innervation of salivary gland
- Visceral innervation from carotid body
What is the function of CN X
- General sensory & motor innervation of pharynx, larynx & oesophagus
- Parasympathetic innervation of viscera
- Visceral innervation from thorax & abdomen, including aortic body & arch
What is the function of CN XI
Movement of head & shoulders
What is the function of CN XII
Movement of the tongue
What is the clinical test for CN I
Sniff & identify substance
What is four clinical tests for CN II
- Fundoscopy
- Visual acuity with eye chart
- Visual filed by confrontation with red pin
- Pupillary reflex (CN II & III)
What is the clinical test for CN III, IV & VI
H movement
What is the clinical test for CN V
V1 for corneal reflex
V2 sensation of pain, touch or temperature
V3 clench teeth or jaw jerk
What is three clinical tests for CN VII
- Ability to taste
- Symmetry of face with facial expressions
- Glabellar tap
What is the clinical test for CN VIII
- Look in ear
- Tuning fork for Weber’s & Rinne test
What is three clinical tests for CN IX & X
- Uvula position
- Gag
- Swallow reflex
What is two clinical tests for CN XI
- Rotate head against
resistance - Shrug shoulders against
resistance
What is the clinical test for CN XII
Protrude & retract tongue (position)
Why do you use as red pin with visual acuity
First saturation of colour we lose
What is the results when there is damaged to CN III
Eye turn upwards & outwards
Not able to adduct eye
What is the results when there is damaged to CN IV
Eye turns upwards & outwards
