CFS Cognitive and Neurological Aspects of CFS 1 — Questions and Answers
Question 1: What term is commonly used to describe the cognitive difficulties in CFS, including problems with memory, concentration, and mental clarity?
- Encephalopathy
- Psychogenic amnesia
- Brain fog (Correct answer)
- Cognitive decline syndrome
Correct answer: Brain fog
Brain fog is the widely recognized term for the cognitive dysfunction in CFS, encompassing difficulties with memory, concentration, and mental clarity.
Question 2: Which type of memory is most frequently found to be impaired in objective testing of CFS patients?
- Long-term declarative memory
- Working memory (Correct answer)
- Procedural memory
- Implicit memory
Correct answer: Working memory
Working memory—the ability to hold and process information in the short term—is the most frequently impaired memory type measured in CFS cognitive testing.
Question 3: Post-exertional cognitive impairment in CFS means that cognitive symptoms tend to:
- Improve following physical activity due to endorphin release
- Remain stable regardless of activity level
- Worsen after physical or mental exertion (Correct answer)
- Occur only during periods of inactivity
Correct answer: Worsen after physical or mental exertion
Post-exertional cognitive impairment refers to the worsening of brain fog and cognitive symptoms following physical or mental exertion, consistent with CFS's overall post-exertional malaise pattern.
Question 4: Which neuroimaging finding has been reported in multiple studies of CFS patients?
- Enlarged hippocampal volume
- Calcium deposits in the thalamus
- Increased global cortical thickness
- Reduced gray matter volume in specific brain regions (Correct answer)
Correct answer: Reduced gray matter volume in specific brain regions
Multiple neuroimaging studies have found reduced gray matter volume in certain brain regions of CFS patients, providing evidence of structural neurological changes.
Question 5: How is information processing speed characteristically affected in CFS patients on objective testing?
- Normal on standardized tests but subjectively impaired
- Significantly slowed compared to age-matched healthy controls (Correct answer)
- Faster than normal due to heightened sensory sensitivity
- Variable, with no consistent pattern across studies
Correct answer: Significantly slowed compared to age-matched healthy controls
Standardized cognitive testing consistently shows that information processing speed is significantly slowed in CFS patients compared to healthy controls.
Question 6: How does unrefreshing sleep relate to cognitive dysfunction in CFS?
- Sleep quality has minimal impact on next-day cognition in CFS
- Treating sleep disorders fully resolves all cognitive symptoms
- Poor sleep quality contributes to worsening of cognitive symptoms (Correct answer)
- Cognitive symptoms always precede sleep problems as the primary issue
Correct answer: Poor sleep quality contributes to worsening of cognitive symptoms
Unrefreshing sleep in CFS contributes to worsening cognitive symptoms, as poor sleep quality further impairs memory, concentration, and processing speed that are already compromised.
Question 7: Which cognitive domain is generally LEAST affected in CFS patients according to research findings?
- Sustained attention
- Processing speed
- Working memory
- Language and vocabulary (Correct answer)
Correct answer: Language and vocabulary
Language abilities and vocabulary are relatively preserved in CFS, while processing speed, working memory, and sustained attention are the most commonly impaired domains.
CFS Cognitive and Neurological Aspects of CFS 1
What term is commonly used to describe the cognitive difficulties in CFS, including problems with memory, concentration, and mental clarity?