TRIGEMINAL NERVE (V) (contd) Jaw jerk
Ask patient to relax jaw. Place finger on the chin and tap with hammer: Slight jerk - normal
Increased jerk - bilateral upper neuron lesion.
FACIAL NERVE (VII)
Observe patient as he talks and smiles, watching for:
- eye closure
- asymmetrical elevation of one corner of mouth
- flattening of nasolabial fold. Patient is then instructed to:
- wrinkle forehead (frontalis) (by looking upwards)
- close eyes while examiner attempts to open them (orbicularis oculi)
- purse lips while examiner presses cheeks j (buccinator)
- show teeth
(orbicularis oris) *
Taste may be tested by using sugar, tartaric acid or sodium chloride. A small quantity of each substance is placed anteriorly on the appropriate side of the protruded tongue. 15
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