In Memoriam

Remembering each member of the Neurodiagnostic Community and honoring their contribution is our goal and privilege.

Please email about the passing of a colleague or member. If possible, include a photo, brief description of his/her career in Neurodiagnostics, and a link to the published obituary.


It is with deep regret and sadness that we inform you of the passing of our beloved colleague, Charles Yingling, Ph.D., CNIM, D.ABNM, on the evening of Sunday, May 2, 2021. Dr. Yingling was a pioneer in the field of Intraoperative Neuromonitoring, a strong advocate for California's licensure efforts, and a reviewer for the ASET journal. He was the Founding Director of the Neural Monitoring Service at the University of California, San Fransisco (UCSF), where he was a Professor of Neurological Surgery from 1984-2002. 

In his last career, he served as the CEO of Golden State Neuromonitoring, a private practice group in San Fransisco, and a Clinical Professor at Stanford School of Medicine. He has personally monitored several thousand surgical cases and has published numerous journal articles and book chapters in the field. A Fellow and Past President of the American Society of Neuropsychological Monitoring (ASNM), he was one of the six people in the U.S. chosen for the Founding Board of the American Board of Neuropsychologic Monitoring (ABNM). 

Since 1999, he has administered the written and oral examinations for the D.ABNM, the highest level Board certification specifically evaluating competency in intraoperative monitoring. Dr. Yingling's contributions to the field were recognized by ASNM in 2002 when he was the recipient of the President's Lifetime Achievement Award and was further recognized as one of the seven international pioneers at the ASNM Annual Meeting in 2017. He is also a Fellow of the American Clinical Neurophysiology Society (ACNS), one of the few non-physicians to be awarded this distinction. He is well known as an engaging and accessible mentor and lecturer and has given invited addresses on monitoring techniques at numerous conferences in the U.S., Europe, and Asia. Since 2002, he has conducted training programs in different monitoring techniques at many institutions throughout the U.S., including major academic medical centers, private hospitals, and private monitoring practices. 

Our deepest sympathies are with his wife, Patricia, his family and numerous colleagues worldwide.

Darryl Chandler

Our colleague Darryl Chandler passed away February 10, 2021. He was 53. Darryl’s career in neurodiagnostics spanned more than 30 years, working at St. Christopher’s Hospital and Temple University Hospital in Philadelphia, St. Mary Medical Center in Langhorne, PA and most recently for Nuvasive Clinical Services in Philadelphia. Darryl held the certifications of R.EEG.T and CNIM. A naturally gifted teacher, Darryl mentored numerous technologists over the years and guided fresh out of school medical residents around the intricacies of EEG patterns and neuromonitoring . His calming presence in the operating room and EEG Lab was always welcome by his many patients, physicians and co-workers.

Darryl loved his job. He was the first one to work and the last to leave. He kept in touch with his team members all day, either by text, chat or in person. His wise advice about your signals or even your life’s problems was available 24-7. He had the gift of making people feel that you were The Most Important Person in his life. Godspeed Darryl. “Those we love don’t go away, they walk beside us everyday”

Linda Daffin

Linda Daffin, age 64, of Westerville, Ohio (formerly of Franklin, IN), passed away November 15, 2020 after a hard-fought battle with COVID-19. Linda obtained a degree in EEG Technology from Indiana University and earned her R. EEG T. in 1980. In 1981, Linda and her husband, Mike, moved to Westerville, OH, where for approximately 20 years she worked as an EEG Technologist & Neurodiagnostic Educator for OhioHealth. She was also instrumental in the planning and design of the Neuroscience Tower at Riverside Methodist Hospital in Columbus.
Linda shared her knowledge and passion with kindness and grace, treating everyone like family. "Mama Daffin" influenced numerous Neurodiagnostic professionals, which helped them become the techs they are today. She will be dearly missed.


It is with sadness we share that Kathleen Walz died on March 7 following a sudden and unexpected illness. Kathleen began her career with Sutter in 2013, working during the night shift as a Registered Electroneurodiagnostic Technologist. She was known for her thoroughness in providing safe patient care, particularly as she requested detailed shift reports to gain a full understanding of her patients. She was strong and passionate about what she believed, and was not hesitant to voice her beliefs when advocating for patients. As a single mom of six children, she loved her children and the outdoors. She will be greatly missed.


Barry William Burkholder passed away November 27, 2018 shortly after retiring in August of that year. Barry was known as the "EEG Guy" among his co-workers and these words were proudly displayed on his license plate. Barry Burkholder will be missed as a loving husband, father, grandfather, and great-grandfather.

The wreath displayed here was affectionately donated by the Neurodiagnostic Lab for Barry's funeral and has a picture of him at his retirement party. The wreath was decorated with his bell that he used to alert patients, the cotton balls that he used for applications, the long q-tips that he used, some EEG electrodes, the label off the can of soup and pineapple chunks that he ate every day for lunch, his ASET number and "EEG GUY".


Barbara Carter, R. EEG T., passed away on September 5, 2018.  She was a technologist at Children’s Hospital in Boston for many years, and served as an instructor in their training program.  Her specialty was teaching head measurement and lead placement to the students, and she has helped countless students over the years.  I am sure that many ASET members will remember their classes and clinical labs with Barbara very fondly, and will tell you that with Barbara, you learned the importance of accuracy.  She was always a wonderful mentor, offering patience and helpful tips.  She was excellent with children and their parents, very caring of those patients who needed the most understanding.  She retired from Children’s Hospital and relocated to Rensselaer, New York, to be near her sisters.  She continued to work at the Neurodiagnostic Lab at Albany Medical Center part time in her retirement, until health issues prevented her from working.  She will be honored by many technologists who knew her, and missed by all of us.


Trey was born January 17, 1979 in Muskogee, Oklahoma to W.R. Hopkins, Jr. (Rick) and Sharon (Graves) Hopkins. Trey left this world on October 31, 2017. He graduated from Muskogee High School in 1997 and received his Bachelor's Degree of Science from Northeastern State University in 2003. He also did post graduate work at the University of Oklahoma.

Trey began his career as a certified intraoperative neurological technician with Neuro Links of Tulsa, where he remained for the last 12 years as a Senior Lead Supervisor. Trey was an avid golfer and team roper. He was a member of Kappa Sigma fraternity and the USTRC.

Trey is preceded in death by sister, Margaret Myree Hopkins; grandparents, Bill and Cleo Hopkins, and Dr. & Mrs. Thomas Wayne Graves.

Trey is survived by the light of his life, his daughter, Brooke Hopkins; mother and father, Rick and Sharon Hopkins; sister, Kathleen and husband Dwayne Elam; nephews, Ridge and Canyon Elam; niece, Sierra and Zach Lewis; great niece, Brighton Lewis; and Brooke's mother, Shelly Hopkins.


MAY 2015 - Recently Tim Cooke's wife Camille died unexpectedly after a routine medical procedure. Tim Cooke is the owner of The Electrode Store.  He has been a long time supporter of our field.

Tim Cooke, a retired Army Major, has requested donations be made in Camille's name to "Pets For Vets".

Condolence cards can be sent to:
The Electrode Store
Attn: Tim Cooke
Post Office Box 188
Enumclaw, WA 98022


It is with great sadness that West Virginia University Healthcare has lost a dear friend and colleague on March 18, 2015. Ruth was born in Waynesburg, PA on September 30, 1946; she was raised in the Dilliner, PA area. Ruth loyally worked at WVUH for 47 years.  She retired in April of 2014. Over the years Ruth has been an instrumental force in EMG. Numerous residents and technologists had the wonderful opportunity to learn and master the craft of performing quality nerve conduction studies under her guidance.  Ruth was eager to advance the field by being one of the charter members of the Mid-Atlantic Neurodiagnostic Society.  She enjoyed the opportunity to attend many regional and national professional conferences.  Ruth Smith will be greatly missed by all of her colleagues. 



Lynn Helscher Causey, 67, of Land O’ Lakes, Florida passed away October 3, 2014. She was born in New Orleans, Louisiana and moved to Florida in 2009. She was a retired Neurodiagnostic Technologist. Lynn was President of the Chat’Hers Women’s Group in Wilderness Lakes Preserve. She is preceded in death by her son, Lawrence Dugas. Lynn is survived by her daughter, Lisa Velez, husband, Marcos and granddaughter, Angelica; brothers, Kurt Helscher and wife, Denise and Mark Frederick Helscher; sisters, Elaine Gaille and husband, Rick, Jan Martinec and husband, David, and Denise Strauss and husband, Bob; many nieces; and many great nieces and nephews.


In April of 2014 we lost a great friend and colleague. Kathy Caplan (aka. Kijewski) lost a long and brave battle with cancer. She worked at both major medical institutions in Cleveland, Ohio.  Although starting her career in EEG at the Cleveland Clinic under Charles Henry, Ph.D.,  Kathy, also called Kate, worked with many individuals and groups over the years and went on to a successful career working in the business side of Neurodiagnostics. She was active in her community working with many charitable institutions. Kathy embodied a life full of love and generosity, kindness, ambition and energy; she will be greatly missed by many of our associates.


2014 - The Center for Health Sciences has established the Nancy Weston Health Sciences Scholarship to memorialize Nancy Weston, a long-time employee of Children’s Hospital Colorado with a strong commitment to advancing neurodiagnostic education.  Nancy recently retired from the Children’s Hospital after a 22 year career and passed away in May.  The memorial fund will be used to advance the Electroneurodiagnostic Technology Program resources.
Tax-deductible donations to the CCD Foundation should indicate the Nancy Weston Health Science Scholarship and can be sent to Francie Anhut, Executive Director of the CCD Foundation. Please be sure to designate your donation for the Nancy Weston Scholarship in the memo line of your check.


RAPID CITY - Christopher “Chris” John Wackel, 27, passed away unexpectedly at home on June 18, 2014.
Chris was born on January 21, 1987, at Rapid City Regional Hospital. He graduated from Rapid City Stevens High School in 2005. He went on to complete an associate’s degree in Electroneurodiagnostic Technology at Southeast Technical Institute and a Bachelor’s of Science in Healthcare Management from Bellevue University. He was employed at Rapid City Regional as an EEG technician.


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