The basic scheme of the model was derived from those of Rawitscher (1932) and Merkys et al. (1972), was that changes of an apex angle occurred as a result of four consecutive stages - the physical change which occurs when the subject is disoriented, conversion of the physical change into a physiological change, transmission of the physiological signal and, finally, the growth response in which differential regulation of growth generates the change in an apex angle.

Back to verbal description of models on spatial organisation of gravitropic reaction.

Back to verbal description of apex-angle based models