How do you test for the 12 cranial nerves?
12th Cranial nerve The 12th (hypoglossal) cranial nerve is evaluated by asking the patient to extend the tongue and inspecting it for atrophy, fasciculations, and weakness (deviation is toward the side of a lesion).
How do you examine the cranial nerves?
CN IX and CN X nerves can be assessed together:
- Ask the patient to cough (assessing CN X)
- Ask the patient to open the mouth wide and say ‘ah’, using a tongue depressor to visual the palate and posterior pharyngeal wall (assessing CN IX and X) The soft palate should move upwards centrally.
How do you test for CN 3?
Inability to follow and object in direction of CN III (the quickest test is to observe upward gaze which is all CN III; the eye on the affected side does not look upward) Inability to open the eyelid. CN III dysfunction causes the eyelid on the affected side to become “droopy”.
How do you test a CN 10?
Cranial Nerves 9 & 10 – Motor The motor division of CN 9 & 10 is tested by having the patient say “ah” or “kah”. The palate should rise symmetrically and there should be little nasal air escape. With unilateral weakness the uvula will deviate toward the normal side because that side of the palate is pulled up higher.
How are cranial nerves 3/4 and 6 tested?
Extraocular movements (CN 3, 4, 6) are examined by asking the patient to follow a finger or pen or card with the eyes. This tests cranial nerves 3 (oculomotor), 4 (trochlear), and 6 (abducens). CN3 mediates medial deviation and all other directions of movement not coordinated by CN4 and CN6.
How do you test for CN VIII?
Cranial Nerve 8 – Auditory Acuity, Weber & Rinne Tests The cochlear division of CN 8 is tested by screening for auditory acuity. This can be done by the examiner lightly rubbing their fingers by each ear or by using a ticking watch. Compare right versus left.
What are the 9 positions of gaze?
The nine gazes are: straight ahead, left, right, straight up, up and to the left, up and to the right, straight down, down and to the left, down and to the right. To get an unobstructed view of the eyes in the downgaze positions, have the patient or better yet, a helper, elevate the patient’s upper lids.
What are the 6 fields of gaze?
You are now familiar with the 6 cardinal directions of gaze (right/up; right; right/down; left/up; left; left/down), as well as the remainder of the yoked eye movements (straight up; straight down; convergence).
What does Perrla mean?
What Does PERRLA Mean? “PERRLA” stands for: Pupils, which are the dark dots in the center of your eyes. They shrink or widen to control how much light gets into your eye. During the test, your doctor will make sure your pupils are in the right part of your eye.