A nurse is assessing a client who has Lewy body dementia. The nurse should recognize that which of the following is responsible for changes in thinking, communication, movement, and emotional processing in Lewy body dementia?
Tau protein
Neurofibrillary tangles
Alpha-synuclein protein
Beta-amyloid protein
The Correct Answer is C
A. Tau protein: Tau protein is primarily associated with Alzheimer's disease and other tauopathies, not Lewy body dementia.
B. Neurofibrillary tangles: Neurofibrillary tangles are aggregates of hyperphosphorylated tau protein found in Alzheimer's disease, not typically in Lewy body dementia.
C. Alpha-synuclein protein: Lewy bodies, which are abnormal aggregates of alpha-synuclein protein, are a hallmark pathology of Lewy body dementia. These protein aggregates disrupt neuronal function and are responsible for the cognitive, motor, and emotional symptoms seen in Lewy body dementia.
D. Beta-amyloid protein: Beta-amyloid protein is primarily associated with Alzheimer's disease, not Lewy body dementia. It forms plaques in the brain, which contribute to neurodegeneration and cognitive decline in Alzheimer's disease.
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Related Questions
Correct Answer is B
Explanation
A. "Blood flow is altered and causes blood to pool in the legs." This statement inaccurately describes venous insufficiency rather than peripheral arterial disease (PAD). In PAD, blood flow is reduced or obstructed due to atherosclerosis, leading to inadequate oxygen supply to tissues rather than pooling of blood in the legs.
B. "Blood flow is altered due to atherosclerosis affecting the tissues' ability to receive oxygen-rich blood." This statement correctly explains the underlying pathology of peripheral arterial disease (PAD). Atherosclerosis, characterized by the buildup of plaque in the arteries, narrows or blocks blood flow, impairing the delivery of oxygen-rich blood to the tissues. This can result in symptoms such as pain, cramping, and tissue damage, especially during activity when oxygen demand increases.
C. "Blood flow is altered due to incompetent valves causing increased venous pressure." This statement describes venous insufficiency rather than PAD. In venous insufficiency, faulty valves in the veins result in increased venous pressure, leading to symptoms such as swelling, heaviness, and varicose veins, but it does not involve arterial obstruction as seen in PAD.
D. "Blood flow is altered due to excessive stretching of the ventricles impairing the heart to contract." This statement describes a condition related to the heart's function rather than peripheral arterial disease. Excessive stretching of the ventricles may occur in conditions such as heart failure, but it does not directly affect blood flow in the peripheral arteries as seen in PAD.
Correct Answer is A
Explanation
A. Loss of sensation and cognition difficulties: Secondary conditions commonly associated with traumatic brain injury (TBI) include sensory impairments such as loss of sensation, as well as cognitive difficulties such as memory loss, attention deficits, and impaired executive functioning. These issues arise due to the damage to brain tissue caused by the initial injury and can have significant impacts on the client's overall function and quality of life.
B. Development of emotional disorders and acute pain : While emotional disorders such as depression, anxiety, and post-traumatic stress disorder (PTSD) are common following TBI, acute pain is not typically considered a primary secondary condition associated with TBI. Chronic pain may develop as a secondary condition, but acute pain is more often associated with the immediate aftermath of the injury.
C. Body dysmorphia and neurofibrillary tangles : Body dysmorphia, a condition characterized by obsessive preoccupation with perceived flaws in physical appearance, and neurofibrillary tangles, abnormal protein aggregates found in the brains of individuals with neurodegenerative disorders such as Alzheimer's disease, are not typically associated with TBI.
D. Decreased appetite and a lack of sleep : While changes in appetite and sleep disturbances may occur as secondary symptoms of TBI, they are not as commonly anticipated as loss of sensation and cognition difficulties. These issues may arise due to disruptions in brain function or changes in lifestyle following the injury.
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