Liepmann ber St rungen des Handelns bei Gehirnkranken) draws a clear distinction between apraxia and agnosic disturbances of conduct, in which the object is not recognized, but in which, however, conduct is in harmony with the representation of the object, and generally between apraxia and disturbances affecting the 'ideational preparation of action' (forgetting the aim, confusing two aims, premature performance, transfer of the aim through some intrusive perception) (op.