A nurse is assessing client with a diagnosis of Huntington's disease (HD) in the later stages. The client has severe cognitive defects. In this case, the nurse will also likely find which classic symptom?
blindness
ataxia
memory loss
choreiform movements
The Correct Answer is D
Huntington’s disease (HD) is an autosomal dominant neurodegenerative disorder characterized by the progressive destruction of neurons in the basal ganglia and cerebral cortex. While cognitive decline and psychiatric symptoms are prominent, the most recognizable hallmark of the disease is the presence of involuntary, jerky movements known as chorea.
Rationale:
A. Blindness is not a clinical feature of Huntington's disease. While HD can cause abnormalities in saccadic eye movements, the ability to move eyes quickly between targets, it does not lead to the loss of visual acuity or the destruction of the optic nerve.
B. Ataxia refers to a lack of muscle coordination and a drunken gait, commonly associated with cerebellar disorders or multiple sclerosis. While a client with HD will have a disturbed gait, the primary cause is the interference of involuntary movements rather than the specific lack of coordination seen in ataxia.
C. Memory loss is a component of the dementia seen in HD, but it is not the classic motor symptom that defines the clinical presentation in the way chorea does. HD-related cognitive decline often starts with executive dysfunction (planning and organizing) rather than the simple short-term memory loss typical of early Alzheimer's.
D. Choreiform movements (chorea) are the classic sign of Huntington's disease. These are involuntary, irregular, unpredictable, and dance-like movements that typically begin in the face and extremities. As the disease reaches the later stages, these movements can become severe and exhaustive, significantly impacting the client's ability to eat, speak, and remain safe.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Alprazolam is a benzodiazepine that works by enhancing the effects of gamma-aminobutyric acid (GABA), the primary inhibitory neurotransmitter in the central nervous system (CNS). Because it has a rapid onset of action, it is highly effective for acute anxiety and panic associated with agoraphobia, but it carries a high risk for profound CNS depression when combined with other substances.
Rationale:
A. Clients should never be instructed to adjust their own dose or frequency based on their subjective anxiety levels. This practice significantly increases the risk of physical dependence, tolerance, and accidental overdose. Any changes to the medication regimen must be directed by the healthcare provider.
B. A tyramine-free diet is required for clients taking Monoamine Oxidase Inhibitors (MAOIs), an older class of antidepressants, to prevent a hypertensive crisis. Alprazolam does not interact with tyramine-rich foods (like aged cheese or red wine), so this dietary restriction is unnecessary for this medication.
C. Drowsiness is a common, expected side effect of benzodiazepines rather than an adverse reaction that must be immediately reported. The client should be cautioned about operating heavy machinery, but reporting it is not the priority instruction compared to the lethal risk associated with substance interactions.
D. The client must be strictly instructed to avoid alcoholic beverages. Both alcohol and alprazolam are CNS depressants. When taken together, they exert a synergistic effect that can lead to severe respiratory depression, coma, and death. This is the most critical safety instruction the nurse can provide.
Correct Answer is A
Explanation
The patient is exhibiting classic signs of acute mania, which is a state of physiological and psychological hyper-arousal. In this phase, the brain's ability to process sensory information is impaired, leading to distractibility and an inability to filter out external noise or activity. The primary nursing goal is to provide a low-stimulus environment to prevent further behavioral escalation and to ensure the safety of the client and the milieu.
Rationale:
A. Decreasing environmental stimuli is the priority intervention. Reducing noise, dimming lights, and moving the client to a quieter area helps lower the client's internal agitation. By limiting the amount of sensory input the brain must process, the nurse helps the client regain a degree of behavioral control and prevents the progression toward physical aggression or exhaustion.
B. Attempting to explain hospital rules and policies is ineffective at this time due to the client's short attention span and fragmented thought processes. During acute mania, clients lack the cognitive focus to retain complex information. Rules should be presented in brief, simple terms only after the client has reached a more stable and less agitated state.
C. Providing feedback about behavior is a social intervention that is likely to be ignored or even trigger further agitation. While the client is racing and talking loudly, they are often unable to perceive their behavior as inappropriate. Confronting the behavior before the client is physiologically calmed can be perceived as a threat, potentially leading to a defensive or combative response.
D. Introducing the client to other staff increases social stimulation, which is contraindicated during an acute manic episode. New faces and multiple introductions provide more sensory data for an already overwhelmed nervous system to process. The nurse should limit the number of staff interacting with the client to provide consistency and calm.
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