The silver cord in metaphysical studies and literature, also known as the sutratma or life thread of the antahkarana, refers to a life-giving linkage from the higher self (atma) down to the physical body. It also refers to an extended synthesis of this thread and a second (the consciousness thread, passing from the soul to the physical body) that connects the physical body to the etheric body, onwards to the astral body and finally to the mental body. In other research, it is described as a strong, silver-colored, elastic cord which joins a person's physical body to its astral body (a manifestation of the physical body that is less distinct). Alfred Ballabene, an astral projector, reported observing that during his out-of-body experiences "glue-like strings" appear as the astral body tries to separate itself from the physical body. As the astral body moves further away from the tangible body, some of the strings break apart and clump into a specific and smaller region – preferably the head, breast, back, stomach, and the abdomen area – thus forming the silver cord. Astral projection During astral projection and out-of-body experiences, some claim they can (at will or otherwise) see a silver cord linking their astral form to their physical body. This cord mainly appears to a beginning projector as an assurance they will not become lost. However, even experienced projectors find it useful, claiming it is a fast way to return to the body. Bellallabene, unlike some astral projectors who claim to travel great distances,, stated that the cord not only serves as a link between the two bodies, but it also limits the astral body from wandering great distances, describing his experience that as the astral body moves farther away from the physical body and reaches a distance of "50 to 70 meters," the silver cord pulls the astral form right back into the physical body. Others asserted, though, that the cases of silver cord observations during out-of-body experiences and astral projections are rare; rather, no astral body is observed and the projector sees himself or herself as a "disembodied awareness or a point of view" in most cases. Passing through a tunnel is compared to the birth canal, and the silver cord resembling the umbilical cord⁣ – these are a few observations during out-of-body experiences that are sometimes likened to childbirth. "Birth theories" hypothesized that people who were delivered by Caesarean