1.   They are termed anisotropic materials and require the measurement of several elastic moduli for their proper specification.

2.   If the polymer is treated as a classical damped harmonic oscillator, both the elastic modulus and the damping characteristics can be obtained.

3.   Therefore, we calculated the circumferential wall tension, compliance, and the pressure elastic modulus rather than wall stress and Youngs elastic modulus.

4.   The pressure elastic modulus showed a similar non-linear pattern.

5.   If only passive properties determine the pressure elastic modulus, an exponential increase would have been expected.

6.   Studies of the human oesophagus and duodenum showed the same influence of intestinal tone upon the pressure elastic modulus during distension.