[Why should LD be discussed now?]

The term learning disability was first used in 1962 by Kirk S A in his textbook. In Japan the term was adopted as a substitute term for MBD in the 1970s. At present many professionals, especially on education and psychology, are interested with LD. The role of child neurologist is discussed here from three viewpoint: the term and definition, LD as a brain dysfunction, and LD in the child neurology. For collaboration with education and psychology, child neurologist should know more about LD and make efforts to find the etiology and mechanism of LD.