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Neurocognitive function in patients with β-thalassemia major
Ozgur Duman1, Sema Arayici, Cigil Fettahoglu
1Department of Pediatric Neurology, Akdeniz University, Antalya, Turkey.
Insights
Children with beta-thalassemia major (β-TM) exhibit cognitive impairments, including lower IQ scores and visuomotor dysfunction. Event-related potentials (ERP) may aid in early diagnosis of these cognitive deficits.
Area of Science:
- Pediatric Hematology
- Neuroscience
- Cognitive Psychology
Background:
- Beta-thalassemia major (β-TM) is associated with increased risk factors for cognitive impairment in children.
- Previous research indicates potential neurological complications in β-TM patients.
Purpose of the Study:
- To evaluate cognitive function in children diagnosed with β-TM.
- To compare cognitive performance and electrophysiological measures between β-TM patients and healthy controls.
Main Methods:
- A cohort of 20 children with β-TM was assessed alongside 21 healthy children.
- Neuropsychological tests and event-related potentials (ERP), including P300 and mismatch negativity, were utilized for evaluation.
Main Results:
- β-TM patients demonstrated significantly lower full-scale, performance, and verbal IQs compared to controls.
- Visuomotor dysfunction was more prevalent in the β-TM group.
- ERP analysis revealed prolonged latencies and reduced amplitudes in β-TM patients, indicating altered neural processing.
Conclusions:
- Neuropsychological tests are reliable for diagnosing cognitive impairment in β-TM.
- ERP measures show promise for facilitating early detection of cognitive deficits in β-TM.
- Larger patient cohorts are recommended for further investigation.
Background:
Children with β-thalassemia major (β-TM) have multiple risk factors for developing cognitive impairment. The aim of the present study was to evaluate cognitive function in patients with β-TM.
Methods:
Twenty children with β-TM were enrolled into the study and were compared with a control group consisting of 21 healthy children. All participants were evaluated with neuropsychological tests and event-related potentials (ERP).
Results:
All of the participants had normal IQ scores, but the patient group had significantly lower full-scale, performance, and verbal IQs compared with the control group (P < 0.05). The number of children with visuomotor dysfunction was higher in the patient group compared with the control group (P < 0.05). In the P300 test, the patient group had significantly prolonged N1, P2 and N2 latencies at the FZ, and a prolonged N1 latency at the Cz compared with the control group (P < 0.05). The patient group also had lower N1 and P3N4 amplitudes at the Fz, and lower N1, N1P2 and P3N4 amplitudes at the Cz when compared with the control group (P < 0.05). Mismatch negativity latency and duration were longer in the patient group (P < 0.05).
Conclusions:
Neuropsychological tests are safe, and reliable for the diagnosis of cognitive impairment in β-TM patients, and the use of ERP may facilitate early diagnosis. The number of β-TM patients in the present study was limited, however, and larger numbers of patients are required in further studies.
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