The thickest and longest nerve in the body is the ischiadic nerve, and is composed of 5 small nerves that come out of the lumbosacral spine and continue down the legs where they branch into smaller nerves in the upper thigh, knee, leaves, foot and fingers. And dewgenerative changes and aging in the intervertebral discs, performance of the wrong movement,lifting cargo from awkward body position leads to cracking the ring discus and the outbreak of its central part, which begins to press the spinal root (the place from where the nerves are). This disorder is called sciatica – sciatica usually occurs in the lumbar spine (lower back). Sciatica in pregnancy affects future young mothers and is also a frequent problem that occurs due to heavy loading of the spine. - See more at: http://www.healthyfoodteam.com/get-rid-of-your-lower-back-pain-sciatica-by-doing-these-simple-exercises/#sthash.VcXb4wvL.dpuf