About Dementia Screening, Inc.

Dementia Screening, Inc. is headquartered in Abilene, Texas. The focus of our organization is:

  • To provide and distribute a system for accurate, reliable and economical screening for the earliest symptoms of dementia.
  • To promote greater public awareness, knowledge, and understanding of the importance of early identification of Alzheimer's disease and other dementias.
  • To contribute to the body of research knowledge that guides clinical care of persons suffering from Alzheimer's disease and other dementias.
  • To adhere to the highest ethical standards in clinical services and business relationships.


Samuel D. Brinkman, Ph.D, is president of Dementia Screening, Inc., and lead developer of the easy-to-use dementia screening tool, The GrayMatters® Assessment System. Dr. Brinkman is a neuropsychologist who has spent more than 30 years in the evaluation and treatment of individuals with Alzheimer’s Disease and other dementias.

He felt strongly that there was a need for a screening system that would be both accurate and cost effective in identifying the earliest symptoms of Alzheimer’s disease After more than eight years of research and development, Dr. Brinkman and a team of other professionals created The GrayMatters® Assessment System.

Dr. Brinkman is currently in private practice in Abilene, Texas, and serves as an adjunct faculty member at Abilene Christian University and Hardin-Simmons University. He served in Vietnam in U.S. Army Intelligence, received his bachelor’s of science degree from the University of Texas at El Paso and his master’s and doctoral degrees from the University of Houston

Dr. Brinkman spent several years in the evaluation of medications developed for Alzheimer’s disease. He maintains an active interest in Alzheimer’s treatment and in head injury care, having chaired numerous boards and committees on both local and national levels.


  Screening For Alzheimer's Disease
An introduction, by Samuel D. Brinkman, Ph.D.
  The GrayMatters® Assessment System
A closer look.
  Alzheimer's News
  Support Information
  Frequently Asked Questions
For Health care providers
  Find a GrayMatters® Testing location
  About Us
  Media Resources
  Research Summary