'Hidden' Cognitive Impairments in DMD May Worsen Outcomes

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'Hidden' Cognitive Impairments in DMD May Worsen Outcomes
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A natural history study that utilized the Pediatric Quality of Life assessment showed that patients with Duchenne muscular dystrophy reported the lowest scores in brain health, including emotional health and school performance.

Please confirm that you would like to log out of Medscape. If you log out, you will be required to enter your username and password the next time you visit. are linked to worse outcomes, but limited access to specialists and limited resources make this problem difficult to address. A new tool from the National Institutes of Health, called "When we talk to families and parents, they are able to identify that even during infancy that have delayed cognitive function.

A study by Dr. Thangarajh's group showed that patients with speech delay and lower IQ had lower performance in timed tests, including 6-minute walk test distance and scored an average of 2 points lower on the North Star Ambulatory Assessment.The Centers for Disease Control and Prevention–supported DMD CARE guidelines only say that neuropsychological evaluations should be considered at diagnosis, but is essential if concerns arise about developmental progress.

Dr. Thangarajh's group assessed 30 boys with DMD and found that crystallized cognition was normal, but they had a deficit in fluid cognition. They found deficits within several subdomains of fluid cognition."This tells us that the NIH Toolbox was able to replicate what we had known in the literature, that these boys really have lower intellectual capacity, but they also have significant weakness in fluid cognition," she said.

She went on to discuss psychosocial determinants of cognitive health in DMD. It is known that women who are carriers of the dystrophin mutation can underperform in cognitively stressful tasks, leading her to wonder if this could lead to transgenerational risk to offspring with DMD. Her group tested women who were carriers of the mutation with the NIH Toolbox and found that they had lower fluid cognition than noncarriers.

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