'Captain' Daryl Dragon and his wife Toni Tennille of the music duo The Captain and Tennille, pose at the Video Software Dealers Association's annual home video convention at the Bellagio July 27, 2005 in Las Vegas.(Photo: Ethan Miller/Getty Images)
FLAGSTAFF, Ariz. -- The Captain and Tennille are headed down the path to divorce, and a survey suggests other older couples follow suit.
Court documents filed by Toni Tennille in Arizona say that her marriage to Daryl Dragon is irretrievably broken and cannot be reconciled. The two have been married for more than 38 years.
The divorce rate among people over 50 years old has almost doubled since 1990, according to a survey from the Census Bureau.
Roger Gurwe, who counsels couples in the Tri-State said a person's personality can change as he/she gets older.
"As people, couples age if there are personality problems or severe issues," Gurwe said. "It can get worse with age, and neurological problems are part of that aging process."
Tenille announced a neurological disorder in 2010. The condition, similar to Parkinson's disease, made it hard for her husband to play music.
The popular 1970s pop duo's hits include "Love Will Keep Us Together," which earned a Grammy for record of the year in 1975.
Tennille and Dragon retired to Prescott in 2008. Their website hints at divorce, saying people evolve over time and hidden feelings are uncovered.
Older couples who want to work through their problems, Gurwe said, should talk issues out, remember when they first became attracted to each other and fall in love, once again, with their quirks.
Tennille's attorney declined comment Thursday.
The two have no children together. Tennille is 73. Dragon is 71.