KNOW YOUR CRANIAL NERVES!

WHICH OF THE FOLLOWING CN IS INVOLVED IN THE BLINKING REFLEX

• CN III

• CN VI

• CN VIII

• CN II

PATIENT X IS HAVING A HARD TIME CHEWING HER FOOD. SHE CANT GET HER JAW TO COMPLETELY CLOSE TO GRIND HER FOOD. WHICH CRANIAL NERVE MAY BE THE PROBLEM?

• CN V

• CN VIII

• CN X

• CN I

Answer explanation

THE PAIRED TEMPORALIS AND MASSETER MUSCLE FUNCTION IN JAW CLOSURE.

WHICH CRANIAL NERVE HAS THE MOST EXTENSIVE EFFECT ON THE BODY?

• CN IV

• CN II

• CN V

• CN X

Answer explanation

CN X INNERVATES STRUCTURES AS DIVERSE AS THE EXTERNAL SURFACE OF THE EARDRUM AND INTERNAL ORGANS OF THE ABDOMEN

PATIENT Y STATES THAT SHE ISN'T ENJOYING HER FOODS LIKE SHE USED TO. IN YOUR ASSESSMENT, SHE STATES THAT SHE HAS A NORMAL APPETITE BEFORE. WHAT NERVE COULD BE CAUSING HER PROBLEM?

• CN I

• CN VIII

• CN X

• CN V

Answer explanation

THE SENSE OF SMELL PUTS THE BODY IN THE MOOD TO EAT. IF SMELL IS DAMAGED, PATIENT MAY NOT FEEL LIKE EATING AND MAKES HER FOOD FLAVORLESS

THIS IS THE LARGEST NERVE THAT HAS BOTH MOTOR AND SENSORY IMPLICATIONS

• CN X

• CN V

• CN VI

• CN III

WHICH CRANIAL NERVE IS ASSOCIATED WITH BELL'S PALSY?

• CN VI

• CN V

• CN VII

• CN X

PEDRO HAS BEEN BROUGHT INTO THE E.R FOR A MOTOR VEHICULAR ACCIDENT. HE COMPLAINS THAT HE CANNOT SEE VERY WELL WITHIN BOTH EYES. HIS RIGHT ARM IS BLEEDING AND HE HAS A BUMP ON THE RIGHT SIDE OF THE HEAD. WHAT CN IS DAMAGED?

• CN V

• CN XI

• CN II

• CN X

Answer explanation

INJURY TO THE OPTIC TRACT ON ONE SIDE RESULTS IN PARTIAL BLINDNESS IN BOTH EYES

THIS CN CONTROLS MOST FACIAL EXPRESSIONS. IT IS ALSO RESPONSIBLE FOR THE SECRETION OF SALIVA

• CN VII

• CN V

• CN III

• CN XII

PATIIENT A, WHEN SITTING STIL HAS NO PROBLEMS. BUT WHEN SHE TRIES TO STAND UP, SHE LOSES HER BALANCE AND COMPLAINS THE ROOM IS MOVING. WHAT CN IS DAMAGED?

• CN V

• CN VIII

• VN IX

• CN X

Answer explanation

CN 8 FUNCTIONS IN BALANCE, EQUILIBRIUM AND ORIENTATION IN 3D SPACE

PATIENT XY PRESENTS WITH A LEFT DROOPING EYE AND LEFT DROOPING MOUTH. WHICH NERVE COULD BE CAUSING THIS PROBLEM?

• CN X

• CN V

• CN VII

• CN VI