Michael Merzenich, Ph.D. is a pioneer in brain plasticity research and the author of more than 150 peer-reviewed articles. He has received numerous awards and prizes, has nearly 100 patents and has been featured in hundreds of books covering topics such as learning, rehabilitation and plasticity.
There shall not be more than the equivilent of four quarter bends (360 degrees total) between pull points, for example, conduit bodies and boxes. ansi/tia/eia-569-b: 8.8.2.2 Bends
Plastic conduit can be heated and bent to non-standards shapes, or pre-formed bends and elbows can be used. Watch out: do not mix types of cements (glues) used with plastic water or drain piping with conduit cement. Conduit cement is not suitable for piping and fittings subjected to pressure.