The Indian Yogis were well aware that earth currents, otherwise known as Geoelectric currents and earth magnetic grid lines, create a downward pulling or heavy energy which they overcame with deer skin, which had a healthy negative charge. The heavy earth currents would interfere with the meditation process of withdrawing of the senses into the cranium. So, the Kaivalya, with its healthy negative charge, promotes the withdrawal of the senses throughout the spinal column back to the Pituitary gland.