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In a message dated 11/3/99 10:53:55 PM Central Standard Time, [log in to unmask] writes: << i have always thought of the reduction of dopamine = producing cells as leaving spare room (for want of a better expression). >> Erika. , Often when most brain cells die, an approximately equal volume of glial cells take up the space. Glial cells can be thought of as the scar tissue of the brain. This is unlike certain types of dementia in which cortical cells disappear leaving a shrunken brain. These glial cells, unfortunately, do not function as the cells they replace. They are …well like scar tissue. Regards, WHH 56/38/37