She’s George’s wife,’” Mr. Wallis said. “And Terry said, ‘She’s way too pretty and way too old for him.’ He was thinking that I was still 12 years old.”

Until he was moved to a rehabilitation facility eight months ago, Mr. Wallis spent nearly all of the last 19 years living at his parents’ home, cared for by family members, including his daughter and his mother, who died in 2018. “She was the glue,” his brother George said, “the absolute savior.”

In addition to his brother George, his daughter, and his father, Mr. Wallis is survived by another brother, Perry; a sister, Tammy Baze; and three grandchildren. His marriage to Sandi Wallis ended in divorce.

Dr. Schiff said that Mr. Wallis and other patients “are still teaching us” about the potential for the brain to deal with trauma.

“I think Terry’s legacy to neuroscience at the highest level,” he said, “is to instill our enduring, undiluted and deep interest in understanding how human consciousness may recover after serious brain injury.”

zebbi Qries