Final answer:
The reference information provided relates to plant movements, not pillow placement for a resident in lateral position. For a human resident, pillows are usually positioned for support and comfort at various points such as under the head, back, knees, and upper arm.
Step-by-step explanation:
The question seems to be about positioning pillows for a resident lying in a lateral position, which is a common practice in healthcare for patient comfort and support. However, the provided reference information discusses sleep movements in plants, specifically the changes in leaf positioning due to variations in pulvinar cell pressure at pivot points. This information is not directly related to the placement of pillows for a resident in lateral position. It appears there may have been some confusion misunderstanding in the question.
Proper pillow placement for a resident in lateral position typically includes a pillow under the head for neck support, one behind the back for stability, one between the knees for hip alignment, and sometimes one under the upper arm for shoulder support.