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Chapter 34: Problem 279

Which cranial nerve is being tested when the nurse asks the client to smile, frown, grimace, show the upper and lower teeth, keep the eyes closed while the examiner tries to open them and puff out the cheeks? A. One (olfactory) B. Five (trigeminal) C. Seven (facial) D. Eleven (spinal accessory)

Short Answer

Expert verified
C. Seven (facial)

Step by step solution

01

- Understand the Function of Each Cranial Nerve

Each cranial nerve has specific functions. The olfactory nerve (I) is responsible for the sense of smell. The trigeminal nerve (V) controls facial sensations and chewing muscles. The facial nerve (VII) controls facial expressions. The spinal accessory nerve (XI) controls shoulder and neck muscles.
02

- Identify the Actions Being Tested

The nurse is asking the client to perform several facial movements: smile, frown, grimace, show upper and lower teeth, keep the eyes closed while the examiner tries to open them, and puff out the cheeks. These actions involve movements of the facial muscles.
03

- Match Actions to Cranial Nerve

Facial movements such as smiling, frowning, and puffing out cheeks are controlled by the facial nerve. This nerve is responsible for motor control of most of the facial muscles and plays a key role in expressions.
04

- Select the Correct Answer

Since the facial nerve (VII) is responsible for the actions being tested, the correct answer is C. Seven (facial).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Facial Nerve Functions
The facial nerve, also known as cranial nerve VII, plays a crucial role in controlling the muscles of facial expression. This nerve allows us to show emotions through actions like smiling, frowning, grimacing, and puffing out our cheeks. It also regulates the secretion of saliva and tears, and plays a key role in the sense of taste for the front two-thirds of the tongue. When a nurse asks a patient to perform tasks such as smiling or closing their eyes tightly, they are assessing the functional integrity of this nerve. This helps in identifying any damage or dysfunction that might affect facial expressions and related abilities.
Cranial Nerve Testing
Cranial nerve testing is a fundamental part of a neurological examination, designed to assess the functionality of each of the twelve cranial nerves. Each nerve is responsible for specific sensory and motor functions. In the case of the facial nerve (VII), testing involves evaluating muscle movements in the face. When a nurse asks a patient to smile, frown, or close their eyes against resistance, these actions can help identify any issues. Testing each cranial nerve helps diagnose various conditions and pinpoint neurological impairments. Simple tasks performed during the examination can reveal much about the state of a person's nervous system.
Nursing Examination Techniques
Nursing examination techniques are vital for accurate patient assessment and diagnosis. These techniques are systematic and comprehensive, ensuring that all possible health issues are considered. For cranial nerve assessment, nurses may ask patients to perform specific movements, like sticking out their tongue or following an object with their eyes. In the case of the facial nerve, asking a patient to smile, frown, or puff out their cheeks helps evaluate muscle function and detect any asymmetry or weakness. Nurses document these observations, which are essential for crafting appropriate care plans and interventions based on the patient's condition.
Neurological Assessment
A neurological assessment is an in-depth evaluation of a patient's nervous system function. It includes testing motor and sensory capabilities, reflexes, and the function of the cranial nerves. Facial nerve assessment is part of this broader examination. During a neurological assessment, a nurse or doctor will observe how well the patient can perform specific tasks and check for any abnormalities. They may use tools such as penlights, reflex hammers, and tuning forks. Through this thorough evaluation, healthcare providers can detect disorders that may affect the brain, spinal cord, and nerves, ensuring early diagnosis and appropriate treatment.

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