CRANIAL NERVE TESTS

Work in Pairs and take turns being the tester or the subject

Record the results on this paper

 


 

I.          Olfactory: sensory for nose

                     Have the subject identify the smell of the coffee & cloves solutions.

 

II.        Optic: sensory for eyes

                    Hold a page of printing a couple of feet away from your subject.  Cover one eye at a time and have the subject
                    read the page  (use eyeglasses if normally worn).

 

III.      Oculomotor: motor for eye muscles

                 Keep your subjects head still while you slowly move a penlight up and down in front of each eye.  Ask them to follow the light.

                    Check for drooping eyelids

                 In a dark room bring the penlight in from the side of each eye and check to make sure the pupils constrict.

 

IV & VI    Trochlear & Abducens: motor for eye muscles

 

                    Keep the subjects head still while you slowly move a penlight left and right in front of both eyes.  Ask them to follow the light with their eyes.

 

V.        Trigeminal:  mixed - sensory and motor for head

 

             Sensory activity: skin of head

                    Touch both sides of the face in the areas of the scalp, forehead, nose, cheek, chin, upper & lower eyelid,

                    and upper & lower lip with dry cotton.

 

            Motor activity: muscles of mastication

                        Ask the subject to clench their teeth. 

                        Ask the subject to open their mouth while you apply subtle pressure under their chin.

 

VII.     Facial:  mixed -  sensory for anterior tongue, motor for head

 

                        Sensory activity:

                        Touch the  tip of the subjects tongue with a q-tip dipped in a 10% solution of Sodium Chloride (table salt). 

                        Do the same with a 10% solution of glucose (sugar) on the anterior surface of the tongue.

 

                        Motor activity:

                        Have the subject, exhale with their mouth closed so as to expand their cheeks. 

                        Also have them raise their eyebrows and wrinkle their forehead.

 

VIII.    Vestibulocochlear: sensory for hearing & equilibrium

                          Cochlea (hearing):
                                Click your fingers lightly and whisper at a distance of 2 feet from each  ear.

                          Vestibule (balance):

                            Slowly spin the subject around in a chair for 15 seconds with their eyes open (about 1turn every 2 seconds).   

                            Quickly stop the chair and see if the subject’s eyes are quivering (moving rapidly). 

                            Then have them get up and walk to see if they maintain their balance.

 

IX .     Glossopharyngeal: mixed – sensory posterior tongue, motor salivary glands

 

                     Motor activity

                            While holding the tongue down with a tongue depressor have the subject say “ahhhh”. 

                            Observe the uvula.

 

X.        Vagus:  mixed - sensory for abdomen, thorax, neck, and root of tongue

                         motor for pharynx, larynx, heart, lungs, digestive organs, spleen, kidneys

                     Sensory Activity
                            Touch the subject’s uvula with a q-tip and observe the response.

 

XI.       Accessory: motor for neck muscles

 

                        Press mildly on the subjects shoulders and ask them to raise them.

                        Do the same on both sides of the subjectís head and have them turn their head left and right

 

XII.     Hypoglossal: motor for tongue muscles

 

                    Observe the subject’s tongue while it is sticking straight out.