"JEN! Jen! Jen!" Bewildered and confused, Jennifer An­iston’s ailing mom is crying out for her famous daughter, sparking fears she might be devel­oping deadly Alzheimer’s disease, say sources.

Since two excruciating falls on Election Day, Nancy Dow, 76, has become increasingly disoriented and unsure of her surroundings, the sources add.

Nancy is said to be reaching out for her famous daughter even when she’s not there – and that has those close to her worrying that her behavior is an early sign of dementia.

“It’s heartbreaking,” said a family friend. “Her mom’s de­terioration has been shocking, and Jen just wants to see her well again.”

Even though Jennifer and her mother have had a stormy relationship for years, includ­ing periods of estrangement, “Jennifer can’t bear to think of her mother having such a terrible, incurable disease,” confided the friend.

And Orlando, Fla.-based phy­sician Dr. Gabe Mirkin told The  ENQUIRER: “Alzheimer’s is ul­timately a deadly disease. In fact, it’s the sixth leading cause of death in the U.S.”

Frail Nancy is still struggling from the effects of a stroke she suffered last year, which left her partially debilitated on her left side. And friends believe her recent falls may have worsened her condi­tion.

As The ENQUIRER reported, the star’s mom took a terrible tumble on Nov. 6 while entering a North Hollywood polling station to cast her vote in the presidential elec­tion, then she fell again when she got home. She was admit­ted to Burbank Rehabilitation Center in great pain and was diagnosed with a hairline shoul­der fracture.

“Now, she’s confused about what’s going on,” said the friend. “She even has trouble forming sentences.”

Divulged another insider: “The family is concerned she may have suffered a second stroke during the Election Day falls.

“The doctors are doing more tests, and there’s also a very real concern she may be in the early stages of Alzheimer’s. She slips into periods of confu­sion, at times doesn’t recognize people, and her short-term memory appears to be dam­aged.”

Loss of memory, the inabil­ity to recall names, places and things as well as the inability to structure sentences can all be early signs of Alzheimer’s disease, according to UCLA psychiatry professor Dr. Gary Small, a leading expert on the illness, who added: “So a thor­ough medical workup would be indicated.”

Concluded the friend: “It’s sad. It’s tough for the whole family.”