Language difficulties vary widely in Dravet syndrome kids

Children with Dravet syndrome experience developmental and language delays, but the nature and severity of their communication difficulties can vary widely, a small study in Spain suggests.

All six children in the study showed delays in language development, but their ability to understand and use language varied considerably. Some had greater difficulty expressing themselves than understanding language, while others had more widespread communication difficulties. Language difficulties also did not always reflect the extent of delays in other areas of development.

Overall, the findings highlight the importance of “multidimensional and individualized assessment approaches” to identify each child’s strengths and challenges, and underscore “the role of speech-language therapists” in identifying communication difficulties early and developing individualized support strategies, the researchers wrote.

The study, “Linguistic and communicative profile of children with Dravet Syndrome: A descriptive case series,” was published in Acta Psychologica.

Dravet syndrome is a rare form of epilepsy that usually begins during the first year of life. Along with seizures, children may experience difficulties with movement, learning, behavior, and language development. Language difficulties can affect both the ability to understand what others say (receptive language) and the ability to communicate through words and sentences (expressive language).

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Previous studies in people with Dravet have reported difficulties with expressive language, including problems with pronunciation, naming objects, and speech fluency. However, research has largely focused on overall development or individual language skills rather than how these abilities vary within each child.

“Consequently, little is known about the overall language performance profile of young children with Dravet syndrome or about how linguistic abilities relate to broader developmental functioning during early childhood,” the researchers wrote.

They characterized the developmental and language profiles of six Spanish-speaking children with Dravet syndrome, five boys and one girl, ages 2.8 to 6.4. One child also had autism spectrum disorder.

The team assessed the children’s overall development, including thinking, movement, social, communication, and everyday practical skills. Language tests evaluated their ability to understand and use language, while parents reported on their children’s communication abilities.

Developmental assessments revealed delays across multiple areas, although their severity varied. Where testing could be completed, overall developmental abilities were comparable to those of children ages 1.3 to 3.2. Communication, movement, and everyday practical skills tended to be more affected, while thinking and social abilities were relatively better preserved.

All six children showed language delays. Although expressive language was frequently affected, consistent with previous research, the pattern and severity of their communication difficulties varied widely.

A 5-year-old boy had greater difficulty expressing himself than understanding language. His receptive language skills were comparable to those of a 2.6-year-old child, while his expressive skills were closer to those of a 2.2-year-old. He had a limited vocabulary and was not yet combining words into sentences.

In contrast, two boys, ages 4.8 and 3.9, had relatively stronger expressive skills than receptive language skills. Both could produce short sentences, although pronunciation difficulties sometimes made their speech hard to understand. The older boy also showed more advanced vocabulary and grammar skills.

The oldest child, a 6.4-year-old girl, had difficulties understanding vocabulary, with skills comparable to those of a 3.8-year-old child. Other assessments could not be completed.

The remaining two boys, ages 2.8 and 4.3, had more severe communication difficulties and did not use spoken language, relying instead on gestures and other nonverbal communication. The younger boy also had autism, while behavioral and sensory difficulties limited testing in the older boy.

Parents’ reports generally agreed with formal assessments, although some abilities reported for two children could not be confirmed during testing.

Language difficulties did not always match delays in other areas of development. Some children had relatively stronger thinking and social skills despite substantial communication difficulties.

“These findings emphasize the need to move beyond describing language impairment as a global developmental delay and instead consider the specific pattern of linguistic strengths and weaknesses presented by each child,” the researchers wrote.

They emphasized the importance of combining developmental and language assessments with parents’ reports to identify each child’s needs and guide individualized support.

“From a clinical perspective, the results support the role of the speech and language therapist within a multidisciplinary team responsible for the early detection, assessment, and intervention of children with Dravet syndrome,” the team wrote.

Early identification and tailored interventions, including communication methods that supplement or replace speech when appropriate, may help improve everyday communication, social participation, and quality of life for children with Dravet and their families, according to the researchers.