Figure 1  .

Schematic model of the proximal stomach wall with muscular component, in series tension receptor, and in parallel elongation receptor. The four panels represent the behaviour of the model in various experimental conditions. Top: Neutral condition; second panel: during distension both elongation and tension receptors are activated (Act). Muscular contraction status is unchanged; third panel: during relaxation, elongation but not tension receptors are activated. The muscular component is lengthened; bottom: during isometric contraction only tension receptors but not elongation receptors are activated. The muscular component is shortened. Inact, inactivated.