Question: what is the difference between a median (midsagittal) plane and a parasagittal plane?
Answer: The midsagittal plane is the specific sagittal plane that is exactly in the middle of the body. The midsagittal or median plane is in the midline; i.e. it would pass through midline structures such as the navel or spine, and all other sagittal planes (also referred to as parasagittal planes) are parallel to it.