In order for the acquisition and development of language to occur, it is necessary to associate a number of factors, whose harmonious functioning determines the success of this process. The hearing loss may be an obstacle, but even so, the deaf child will be able to acquire language through a sign language. However, when the child shows neurological changes, the speech monitoring becomes necessary. This research is a case study of a deaf child, aged 5 years and 10 months, in the acquisition of sign language, who presents neurological impairment. It aims to assess, analyze, and deepen the knowledge on a rare disease (pachygyria) associated with deafness, showing the impact that this can pose to the child regarding communication. Data collection was done through formal evaluations and observational regarding the ability and modality used for communication, language development, phonological and lexical knowledge in Brazilian Sign Language (LIBRAS); in addition to a questionnaire. The results showed delay in language acquisition, even considering the gap between the child’s birth and the early acquisition of LIBRAS, aspects that may be related to the diagnosis of pachygyria. It is important that the audiologist know LIBRAS and know to assess the language of the child who uses this language, because cases like these reveal the complexity of the association between deafness and various neurological disorders.
Case studies; Speech; Child Language; Lissencephaly; Neurology; Deafness