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THE ROLE OF NEUROPSYCHOLOGICAL ASSESSMENT IN ASD DIAGNOSIS
AND INTERVENTION
Doniyorova F.A.
https://doi.org/10.5281/zenodo.14988350
Relevance.
Autism Spectrum Disorders (ASD) are characterized by cognitive, social, and
motor impairments, yet standardized neuropsychological assessments are often underutilized
in ASD diagnosis and treatment planning. Many children with ASD exhibit deficits in attention,
executive functioning, speech processing, motor coordination, and memory, which significantly
impact their learning and adaptive abilities. Identifying higher cortical function impairments in
ASD can help refine therapeutic strategies, improving patients' cognitive and behavioral
outcomes.
Research Objective.
The aim of this study is to analyze the role of neuropsychological
assessment in diagnosing cognitive dysfunctions in ASD and to compare the severity of
impairments between children diagnosed with Kanner’s Syndrome and Asperger’s Syndrome.
The study focuses on how comprehensive cognitive evaluations can guide personalized
interventions to support neurodevelopmental progress in ASD children.
Materials and Methods.
This study included 240 children with ASD, divided into two
diagnostic subgroups:
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Kanner’s Syndrome (F84.0) – 129 children (53.8%)
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Asperger’s Syndrome (F84.5) – 111 children (46.2%)
A control group of 60 neurotypical children, matched by age and gender, was used for
comparison. The Childhood Autism Rating Scale (CARS) was applied to assess autism severity
levels. Neuropsychological testing included praxis, auditory-motor coordination, stereognosis,
visual gnosis, speech processing, and memory assessments. The evaluation followed an
adapted version of A.R. Luria’s methodology for pediatric neuropsychologists. Statistical
analysis was conducted using Fisher’s exact test and Pearson’s Chi-square test, with a
significance level of p < 0.05.
Results and Discussion.
Neuropsychological assessment revealed significant cognitive
dysfunctions in children with ASD, with more severe deficits observed in children diagnosed
with Kanner’s Syndrome.
Kinesthetic praxis impairments were noted in 41.9% of Kanner’s
Syndrome patients and 18.0% of Asperger’s Syndrome patients, suggesting parietal lobe
dysfunction affecting motor planning.
Spatial praxis impairments were significantly higher in Kanner’s Syndrome (54.3%) than
in Asperger’s Syndrome (3.6%), indicating difficulties in spatial awareness and motor
coordination. Auditory-motor coordination impairments were observed in 82.9% of Kanner’s
Syndrome patients and 27.0% of Asperger’s Syndrome patients, reflecting temporal lobe
dysfunction affecting sensory integration. Stereognosis deficits, indicative of parietal lobe
dysfunction, were found in 82.9% of Kanner’s Syndrome patients and 28.8% of Asperger’s
Syndrome patients. Visual gnosis deficits, which affect object recognition and spatial
processing, were found in 87.6% of Kanner’s patients and 44.1% of Asperger’s patients,
suggesting occipital lobe dysfunction. Speech impairments were universal in 100% of both
groups, though Kanner’s Syndrome patients exhibited more severe expressive and receptive
language deficits.
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Auditory-verbal memory deficits were observed in 82.9% of Kanner’s Syndrome patients
and 69.4% of Asperger’s Syndrome patients, highlighting frontal, temporal, and parietal lobe
dysfunctions. Deficits in drawing tasks were identified in 67.4% of Kanner’s Syndrome patients
and 44.1% of Asperger’s Syndrome patients, reflecting difficulties in motor coordination and
executive function.
The praxis tests revealed impaired voluntary movement execution, spatial disorientation,
and difficulty integrating sensory inputs into coordinated actions. Errors in auditory-motor
coordination tests confirmed dysfunctions in the frontal and temporal lobes, affecting the
ability to synchronize movements with rhythmic stimuli.
Speech processing deficits were more pronounced in Kanner’s Syndrome patients, with
echolalia, delayed speech onset, articulation issues, and comprehension difficulties being
common. Memory deficits were also more severe in Kanner’s Syndrome, particularly in word
recall and retention tasks, indicating impairments in auditory-verbal processing and executive
function.
Children with ASD exhibited difficulties in attention regulation, leading to rapid mental
exhaustion, inability to maintain concentration, and failure to correct mistakes when prompted.
These findings suggest that cognitive and executive function impairments are key contributors
to ASD-related learning difficulties.
Conclusion
Neuropsychological assessment provides critical insights into the cognitive dysfunctions
associated with ASD, particularly in Kanner’s Syndrome, where impairments are most severe.
The study confirms that higher cortical function impairments in ASD affect multiple brain
regions, including the frontal, parietal, temporal, and occipital lobes, contributing to motor,
language, and memory deficits.
Identifying these dysfunctions can help develop personalized interventions, including:
Speech therapy for expressive and receptive language deficits.
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Sensory integration therapy to improve auditory-motor coordination and praxis skills.
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Executive function training to enhance memory, attention, and problem-solving skills.
The findings highlight the necessity of integrating neuropsychological evaluations into
standard ASD diagnostic protocols to improve therapeutic strategies and patient outcomes.
Future research should focus on developing targeted neurocognitive rehabilitation programs
tailored to the specific impairments observed in different ASD subtypes.
