Backward movement is often characterized by severe bending motions, more sharply angled and/or much deeper than stereotypical sinusoidal body bends of the control. Animal moves backward with uncharacteristic loss of smooth sinusoidal motion or body posture (Wormatlas).
The animal moves or rests with uncharacteristic loss of smooth sinusoidal motion or body posture. Movement is often characterized by severe bending motions, more sharply angled and/or much deeper than stereotypical sinusoidal body bends of the control animals.