A client is clenching the jaw closed to avoid taking a prescribed oral medication. The nurse can use this observation to confirm the client is demonstrating motor function of which cranial nerve?
Glossopharyngeal
Trigeminal
Vagus
Facial
The Correct Answer is B
A. The glossopharyngeal nerve is involved in several functions, including taste sensation on the posterior third of the tongue, salivation, and the sensation of the pharynx. It also plays a role in swallowing and gag reflex. However, it is not responsible for the movement of the jaw or clenching of the jaw.
B. The trigeminal nerve is responsible for sensation in the face and also controls the muscles of mastication (chewing). It has both sensory and motor functions. The motor branches of the trigeminal nerve, specifically the mandibular division, innervate the muscles that allow for jaw movement, including clenching.
C. The vagus nerve has a broad range of functions, including regulating heart rate, digestive tract motility, and some aspects of speech and swallowing. It does not control jaw movement or clenching, so it is not relevant to this observation.
D. The facial nerve controls the muscles of facial expression, including movements like smiling, frowning, and closing the eyes. It is not involved in the motor control of the jaw or clenching actions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. A reflex grade of 2+ is considered normal. It indicates that the reflex is present and of normal intensity, with a typical response.
B. A reflex grade of 3+ is considered brisk. It indicates that the reflex is more pronounced than normal
but not necessarily pathological. It’s often described as "brisk" or "exaggerated."
C. A reflex grade of 1+ is considered diminished or hypoactive. It indicates that the reflex is present but less intense than normal.
D. A reflex grade of 4+ is considered very brisk or hyperactive. It indicates a reflex response that is exaggerated and may suggest an upper motor neuron lesion or other neurological abnormalities.
Correct Answer is B
Explanation
A. Blurred vision is generally associated with visual system issues, which involve the occipital lobe or the visual pathways rather than the frontal lobe. Broca’s area, located in the frontal lobe, is involved in speech production and not in vision processing.
B. Difficulty speaking is a key symptom associated with damage to Broca’s area, which is located in the frontal lobe and responsible for speech production. A contusion in this area can lead to expressive aphasia, where the individual has trouble forming grammatically correct sentences and articulating words, while comprehension remains relatively intact.
C. Loss of tactile sensation would generally be associated with damage to the parietal lobe, where the primary somatosensory cortex is located. The parietal lobe processes sensory information such as touch, temperature, and pain. Since Broca’s area is located in the frontal lobe and primarily deals with language production, loss of tactile sensation is not typically expected from a frontal lobe contusion affecting Broca's area.
D. Inability to hear high-pitched sounds relates to issues with the auditory pathways or structures involved in hearing, such as the temporal lobe or the auditory cortex, not the frontal lobe. The frontal lobe and Broca’s area do not directly control auditory perception.
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