👉 Sacro-iliac ischias (also known as sacroiliac joints) are a pair of intervertebral discs located between the vertebrae. These discs connect the lower part of the spine to the pelvis and help to stabilize the vertebral column. They are also responsible for transmitting shock and pressure from the thoracic vertebrae to the lumbar vertebrae in the lower back. The sacro-iliac joints play a crucial role in maintaining spinal stability,