Recent studies suggest aphantasia is indeed a lack of visual imagery rather than the lack of awareness of having internal visual imagery - with some people experiencing loss of this ability after injuries.
Dawes and colleagues asked 667 people (267 of them who self-identified as having aphantasia) a series of eight questionnaires on visualisation, memory, dreaming, and response to trauma.
But not all of those with visual aphantasia had their other sensory imaginings missing, suggesting variations in this way of experiencing our inner minds.
The researchers note that as their study relied on self-reporting so their results may be influenced by response biases, where people who identify themselves one way will answer questions according to how they believe that identity would.
The findings support prior research which found that, generally, one standard drink a day for women and two a day for men -- which is the US guidance -- appears to offer some cognitive benefits.
It found that alcohol was the leading risk factor for disease and premature death in men and women between the ages of 15 and 49 worldwide in 2016, accounting for nearly one in 10 deaths.
Study participants, who were predominately white, female and a mean age of 62, were given cognitive tests starting in 1996 through 2008, and were surveyed every other year for approximately nine years.
Interestingly, the new study did not find the cognitive benefit held true for African Americans.
For women, a general maximum target is about four to six drinks per week in his Alzheimer's prevention clinic, he said.
Paranoid hallucinations plague many coronavirus patients in I.C.U.s, an experience that can slow recovery and increase risk of depression and cognitive issues.
Some patients develop small blood clots that don’t cause strokes but spur subtle circulation disruption that might trigger cognitive problems and delirium, Dr. Inouye said.
At home now in San Francisco after a 60-day hospitalization, Mr. Temko said his suggestion that his family shoot him stemmed from a delirium-fueled delusion that he’d been abducted.
Mr. Temko began experiencing pain and anxiety, compelling doctors to balance treating those conditions with using medications that can worsen delirium, they said.
A number of studies of flu, rhinovirus, coronavirus and other microbes have shown that respiratory illnesses, including the new coronavirus, can spread by touching contaminated surfaces, particularly in places like day care centers, offices and hospitals.