“In general, gray matter shrinkage may have no impact,” says Dr. Nicole Prause of University of California, Los Angeles.
That three-pound lump of gray matter contains 100 billion neurons and 100 trillion synapses, or connections.
Smaller volumes of gray matter may not themselves even be cause for concern.
gray matter n.
Brownish-gray nerve tissue, especially of the brain and spinal cord, composed of nerve cell bodies and their dendrites and some supportive tissue. Also called gray substance, substantia grisea.
|gray matter |
The brownish-gray tissue of the vertebrate brain and spinal cord, made up chiefly of the cell bodies and dendrites of neurons. Compare white matter.