ALTERAÇÕES SENIS DO ENCÉFALO DE CANINOS – ASPECTOS IMAGINOLÓGICOS
Palavras-chave:
cão, encéfalo, envelhecimento, ressonância magnética, tomografia computadorizada.Resumo
Estudos relacionados à verificação das alterações senis no encéfalo de cães têm se tornado de grande importância devido ao crescente atendimento médico de caninos idosos. A determinação dos achados encefálicos em um processo normal de senilidade possibilita a identificação de anormalidades durante o mesmo. Na condição normal desse processo, uma redução volumétrica de diversas regiões encefálicas, que está associada a um alargamento dos sulcos cerebrais, uma discreta a moderada dilatação dos ventrículos laterais, uma diminuição na altura do hipocampo e um alargamento dos cornos temporais, pode ser verificada. Uma redução da atenuação das substâncias branca e cinzenta, assim como, alterações de intensidade também podem ser observadas nas imagens encefálicas por tomografia computadorizada e ressonância magnética, respectivamente, de indivíduos idosos. Nessa última modalidade de imagem, áreas hiperintensas na sequência T2 e hipointensas em T1 foram descritas no encéfalo de humanos e caninos, respectivamente. Nestes pacientes, um aumento da frequência destas lesões ocorre conforme o avanço da idade.
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