Bone tissue which has been depleted of its minerals; e.g., calcium and phosphorous.

A tremor control therapy for patients with Parkinson's Disease or essential tremors, who do not respond effectively to medications. It is a surgical reversible procedure that involves implanting a device to deliver mild electrical stimulation to block the brain signals that cause tremor.

A nerve cell process that transmits impulses toward the cell body.

The tough, elastic structure that is between the bodies of spinal vertebrae. The disc consists of an outer annulus fibrosus enclosing an inner nucleuspulposus.

The loss of the structural and functional integrity of the disc.

Surgical removal of part or all of an intervertebral disc.

Situated away from the center of the body.