Comment on the exchange of theoretical notes between Smith and Black and Lang

In an exchange of notes Black and Lang present previously unpublished muscle-potential data indicating the relative effectiveness of curare drugs in (at least) greatly reducing skeletal-motor accompaniments of cardiac conditioning. This weakens the theoretical position of Smith who holds that ANS conditioning is an artifact. The muscle-potential data of Black and Lang and additional data from cardiac conditioning experiments with brain stimulation are also interpreted as weakening Smith's theoretical position. A combined experimental attack on the problem is suggested.