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 A
Explanation
A) Increased muscle weakness: Guillain-Barré syndrome is characterized by the rapid onset of muscle weakness, which typically starts in the lower extremities and ascends. The nurse would expect to find varying degrees of muscle weakness as a hallmark symptom, which may progress to involve the upper limbs and respiratory muscles.
B) Pronounced muscle atrophy: While muscle weakness is a significant feature of Guillain-Barré syndrome, pronounced muscle atrophy is not typically seen immediately. Muscle atrophy may occur over time due to disuse but is not a direct initial finding upon assessment.
C) Diminished visual acuity: Visual acuity may not be directly affected in Guillain-Barré syndrome. While some patients may experience ocular symptoms, diminished visual acuity is not a primary feature of the syndrome and would not be expected as a common assessment finding.
D) Impaired cognitive reasoning: Guillain-Barré syndrome primarily affects the peripheral nervous system and does not usually impact cognitive function. Patients typically maintain full cognitive abilities, so the nurse should not anticipate findings
Correct Answer is D
Explanation
A) Inflammation of the lamina of the involved vertebra: While inflammation can contribute to pain, it is not the primary cause in the context of a herniated disc. The pain associated with a herniated disc is typically related to nerve compression rather than inflammation of the lamina itself.
B) Shifting of two adjacent vertebrae out of alignment: This describes a different condition, such as spondylolisthesis. A herniated disc primarily involves the displacement of disc material, rather than a significant misalignment of the vertebrae.
C) Increased pressure of cerebral spinal fluid within the vertebral column: Increased cerebrospinal fluid pressure is not typically associated with herniated discs and does not directly cause the pain related to this condition.
D) Compression of the spinal cord by the extruding disc: This is the most accurate explanation for the patient's pain. A cervical herniated disc can protrude and compress nearby nerve roots or the spinal cord itself, leading to significant pain, weakness, and other neurological symptoms. This compression is the primary cause of pain in patients with this diagnosis.