The case against routine electroencephalography in specific language impairment.

Area of Science:

• Neuroscience
• Developmental Pediatrics
• Clinical Electrophysiology

Background:

• Specific language impairment (SLI) is a developmental disorder affecting language disproportionately to other domains.
• Electroencephalography (EEG) is used in investigating SLI, but its necessity is debated.
• Current understanding of EEG's role in SLI diagnosis remains uncertain.

Purpose of the Study:

• To evaluate the utility of electroencephalography (EEG) in the diagnostic workup of children with specific language impairment (SLI).
• To determine the prevalence and clinical significance of abnormal EEG findings, particularly epileptiform activity, in children with SLI.

Main Methods:

• A retrospective review of 111 children diagnosed with SLI who underwent EEG over 10 years.
• Exclusion criteria included prior seizures, acquired language issues, developmental delays, hearing loss, autism, and known CNS disorders.
• Analysis focused on EEG results, specifically epileptiform activity, and its relation to language delay type.

Main Results:

• The majority of participants (76%) were boys.
• Abnormal EEG results were found in 31.5% of children; epileptiform activity was present in 6.3%.
• Epileptiform activity was rare, active in only 3 cases, and not linked to the type of language delay.

Conclusions:

• While abnormal EEG findings are common in SLI, clinically significant epileptiform activity is infrequent.
• Awake EEG appears to have limited value in the routine diagnosis of young children with SLI.
• Further research on both awake and sleep EEG in homogenous SLI populations is needed for definitive recommendations.