Dictionary.net

a loss of the ability to write or to express thoughts in writing because of a brain lesion

a loss of the ability to write or to express thoughts in writing because of a brain lesion

Loss or impairment of the ability to write (letters, syllables, words, or phrases) due to an injury to a specific cerebral area or occasionally due to emotional factors. This condition rarely occurs in isolation, and often accompanies APHASIA. (From Adams et al., Principles of Neurology, 6th ed, p485; APA, Thesaurus of Psychological Index Terms, 1994)

Loss of the power of writing, due either to muscular incoordination (motor a.) or to an inability to phrase thought (cerebral or mental a.). Acoustic a. is acquired inability to write from dictation, optic a., to copy. In amnemonic a. letters and words can be written, but not connected sentences; in verbal a. single letters can be written, but not words; in absolute, atactic, or literal a. not even unconnected letters can be ritten. Musical a. is the loss of power to write musical notation.

Inability to write ideas.

Inability to express thoughts by writing, owing to a central lesion.

Inability to write, due to disease of the central nervous system. A mental defect in which the patient finds it difficult or impossible to recall or arrange written characters. [Gr.]