Unilateral Trigeminal nerve injury is tested by Β mcq Β given below:
Q. Unilateral Trigeminal nerve injury is tested by(a) elevation and Lowering of jaw Β |
| Do you Agree with Answer comment below |
π§ Testing the Trigeminal Nerve (CN V)
Letβs understand this in a very simple way.
What is the trigeminal nerve?
The trigeminal nerve is the 5th cranial nerve (CN V).
It is responsible for:
- Sensation of the face
- Movements of chewing muscles
How is the trigeminal nerve tested?
β Correct Answer: (a) Elevation and Lowering of Jaw
Why?
The trigeminal nerve supplies the muscles of mastication (chewing).
π To test its motor function, the nurse asks the patient to:
- Open and close the mouth
- Elevate and lower the jaw
- Clench the teeth
Weakness or deviation of the jaw may indicate trigeminal nerve injury.
Why other options are not correct?
- (b) Inability to tense the jaw β β This is a possible finding, not the test itself
- (c) Blinking of eye β β Mainly involves facial nerve (CN VII)
- (d) Corneal reflex β β Tests sensory CN V and motor CN VII together, not the primary motor test
Simple Exam Trick:
Trigeminal nerve = Chewing muscles β Test by moving the jaw up and down
π Disclaimer: For exam preparation only. Follow neurological assessment guidelines in clinical practice.
π Exam Objective Nursing β Asha D
Concept clarity β’ Easy recall β’ Nursing success