Landau Kleffner syndrome (LKS) is an unusual childhood condition distinguished by a lack of language understanding (auditory-visual agnosia) and visual speech (aphasia) in conjunction with extreme irregular electroencephalographic (EEG) results in most patients throughout sleep and clinical seizures.
This condition is also defined as progressive convulsive epileptic aphasia and aphasia. LKS usually begins in children aged between 2 and 8 years. The most common starting age is age 5 to 7 years. Age refers equally to both sexes. A slow or unexpected loss of the ability to understand words or things familiar sounds are usually heard in a child who has grown properly. Although it most often affects the child’s understanding of spoken language, it can impair both speech comprehension and speaking capacity.