During the assessment of a client's head and neck, the nurse observes the client's facial expressions and the face for symmetry and movement. Which cranial nerve is the nurse assessing?
VII
V
III
VI
The Correct Answer is A
A) VII: The facial nerve (cranial nerve VII) is responsible for controlling the muscles of facial expression. By assessing facial symmetry and movement, the nurse evaluates the integrity and function of this nerve, which is crucial for activities such as smiling, frowning, and raising eyebrows.
B) V: The trigeminal nerve (cranial nerve V) is primarily responsible for sensation in the face and motor functions such as chewing. While it plays a role in facial movement, it does not specifically assess facial expressions.
C) III: The oculomotor nerve (cranial nerve III) controls eye movement and pupil constriction. It does not directly influence facial expressions, so it is not the nerve being assessed in this context.
D) VI: The abducens nerve (cranial nerve VI) is responsible for lateral eye movement. It is unrelated to facial expression or symmetry and is not the focus of this assessment.
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Correct Answer is B
Explanation
A) Have the client smile, frown, and puff out their cheeks: This test assesses the facial nerve (cranial nerve VII), not the trigeminal nerve (cranial nerve V). While important for evaluating facial movement, it does not specifically test the motor function of the trigeminal nerve, which is responsible for mastication.
B) Palpate the masseter muscles when the client clenches their teeth: This is the correct test for assessing the motor function of the trigeminal nerve. The trigeminal nerve innervates the muscles responsible for chewing, and palpating the masseter muscles during clenching allows the nurse to evaluate muscle strength and function. It provides insight into the motor capabilities associated with this cranial nerve.
C) Assess constriction of the client's pupils with direct and indirect light: This test evaluates the function of the optic nerve (cranial nerve II) and the oculomotor nerve (cranial nerve III). It does not assess the trigeminal nerve and is not relevant for this assessment.
D) Ask the patient to turn their head left and right with resistance: This action tests the spinal accessory nerve (cranial nerve XI), which is involved in neck movement. It does not relate to the function of the trigeminal nerve, making it an inappropriate choice for this specific assessment.
Correct Answer is B
Explanation
A) This would indicate pitting edema: Tenting is not indicative of pitting edema, which is characterized by a depression left in the skin after pressure is applied. Tenting specifically refers to the skin's elasticity and is assessed by pinching the skin, observing how quickly it returns to its normal position.
B) This may indicate dehydration, but might not be reliable in an older adult: Tenting is often a sign of dehydration, as it reflects decreased skin elasticity. However, in elderly individuals, skin changes due to aging (like reduced elasticity and moisture) may make this assessment less reliable. Factors such as medications, health status, and overall skin integrity can also influence this observation, making it necessary to consider other indicators of hydration.
C) This means the client is well hydrated: Tenting does not indicate adequate hydration. In fact, it typically suggests the opposite, as well-hydrated skin should return to normal quickly after being pinched.
D) This indicates peripheral neuropathy: While peripheral neuropathy can affect skin and tissue integrity, tenting specifically relates to skin turgor and elasticity rather than nerve function. Tenting is not a direct indicator of neuropathy; other assessments would be needed to evaluate nerve health.