The advanced practice registered nurse (APRN) is assessing a patient who presents with fever, diarrhea, pelvic pain, and left lower quadrant pain. The patient reports the symptoms have been gradually getting worse. What is the most likely diagnosed based on these symptoms?

A. Wernicke aphasia is correct because it is characterized by fluent, rapid speech that is often nonsensical, includes neologisms (invented words), and the patient demonstrates impaired comprehension of both spoken and written language. The patient cannot follow simple commands or understand questions, which is consistent with a receptive language deficit caused by damage to Wernicke’s area in the posterior superior temporal gyrus of the dominant hemisphere (usually the left).

B. Dysphonia is incorrect because it refers to disorders of vocal quality, pitch, or volume, typically due to laryngeal or vocal cord pathology. Dysphonia affects speech production but does not impair language comprehension or content.

C. Dysarthria is incorrect because it refers to impaired articulation of speech due to motor deficits (e.g., weakness, incoordination, or paralysis of the speech muscles). Dysarthric speech is often slurred, slow, or effortful, but comprehension is preserved, unlike in Wernicke aphasia.

D. Broca aphasia is incorrect because it involves nonfluent, effortful speech with relatively preserved comprehension. Patients often speak in short, broken phrases and omit small words (agrammatism), which is the opposite of the fluent but meaningless speech described in this patient.

A. Flashlight is incorrect because it is primarily used to assess pupillary reactions (cranial nerves II and III) or to inspect the oral cavity. While a flashlight helps with visual inspection and pupil response testing, it does not evaluate the sensory or motor functions of the trigeminal nerve, which are essential for diagnosing its injury.

B. Cotton swab is correct because the trigeminal nerve has both sensory and motor components. The sensory function is responsible for facial sensation across three divisions: ophthalmic, maxillary, and mandibular. The APRN uses a cotton swab to lightly touch different regions of the face, including the forehead, cheeks, and jawline, to assess the patient’s ability to feel light touch. The motor function controls the muscles of mastication, which are essential for chewing. The APRN can assess this by asking the patient to clench their teeth, move the jaw from side to side, or resist jaw opening. Using both observations helps identify trigeminal nerve injury, which may manifest as loss of facial sensation, weakness in jaw movement, or difficulty chewing.

C. Snellen chart is incorrect because it is used to assess visual acuity, which evaluates cranial nerve II (optic nerve). It provides no information about facial sensation or the ability to chew, so it is not appropriate for trigeminal nerve assessment.

D. Tuning fork is incorrect because it is used to assess hearing (cranial nerve VIII) or vibratory sensation in peripheral nerves. While useful in other neurological assessments, it does not provide data on trigeminal nerve function, either sensory or motor.