Question: What mental illness do historians think Jackson Pollock may have suffered from?
About the article "Jackson Pollock", section "Early life".

Candidate passages:
Olfactory deficits have been found in patients suffering from mental disorders and there is evidence suggesting that olfactory deficits can be a predictor of mental illness and disease.
Research suggests that olfactory memory deficits can be good predictors of several mental disorders such as depression, dementia and neurodegeneration, as each disorder has its own distinct features leading to specific predictions about what type of mental disorder a person may have. 
Pollock was born in Cody, Wyoming, in 1912, the youngest of five sons.
His parents, Stella May (née McClure) and LeRoy Pollock, were born and grew up in Tingley, Iowa and were educated at Tingley High School.
Pollock's mother is interred at Tingley Cemetery, Ringgold County, Iowa.
His father had been born with the surname McCoy but took the surname of his adoptive parents, neighbors who adopted him after his own parents had died within a year of each other.
Stella and LeRoy Pollock were Presbyterian; they were of Irish and Scots-Irish descent, respectively.
LeRoy Pollock was a farmer and later a land surveyor for the government, moving for different jobs.
Jackson grew up in Arizona and Chico, California.
While living in Echo Park, California, he enrolled at Los Angeles' Manual Arts High School, from which he was expelled.
He already had been expelled in 1928 from another high school.
During his early life, Pollock explored Native American culture while on surveying trips with his father.
In 1930, following his older brother Charles Pollock, he moved to New York City, where they both studied under Thomas Hart Benton at the Art Students League.
Benton's rural American subject matter had little influence on Pollock's work, but his rhythmic use of paint and his fierce independence were more lasting.
From 1938 to 1942, during the Great Depression, Pollock worked for the WPA Federal Art Project.
Trying to deal with his established alcoholism, from 1938 through 1941 Pollock underwent Jungian psychotherapy with Dr. Joseph Henderson and later with Dr. Violet Staub de Laszlo in 1941-1942.
Henderson engaged him through his art, encouraging Pollock to make drawings.
Jungian concepts and archetypes were expressed in his paintings.
Recently historians have hypothesized that Pollock might have had bipolar disorder.
Hans Namuth was not initially interested in the work of Jackson Pollock, but was convinced by his teacher Alexey Brodovitch that Pollock was an important painter.
In July 1950, Namuth approached Pollock and asked to photograph the artist working in his studio.
Pollock agreed, encouraged by his wife, Lee Krasner, who was aware of the importance of media coverage.
The resulting images helped to demystify Pollock's famous "drip" technique of painting, revealing it to be a deliberative process rather than a random splashing of paint.
They "helped transform Pollock from a talented, cranky loner into the first media-driven superstar of American contemporary art, the jeans-clad, chain-smoking poster boy of abstract expressionism," according to acclaimed culture critic Ferdinand Protzman.
Not satisfied with black and white stills, Namuth wanted to create a color film that managed to focus on Pollock and his painting at the same time, partially because he found more interest in Pollock's image than in his art.
His solution was to have Pollock paint on a large sheet of glass as Namuth filmed from underneath the work.
As Namuth could not afford professional lighting, the film was shot outside Pollock's Long Island home.
This documentary (co-produced with Paul Falkenberg) is considered one of the most influential for artists.
In November 1950, Namuth and Pollock's relationship came to an abrupt conclusion.
After coming in from the cold-weather shoot of the glass painting, Pollock, who had been treated in the 1930s for alcoholism, poured himself a tumbler of bourbon whiskey after supposedly having been sober for two years.
An argument between Namuth and Pollock ensued with each calling the other a "phony", culminating in Pollock overturning a table of food and dinnerware in front of several guests.
From then on, Pollock reverted to a more figure-oriented style of painting, leading some to say that Namuth's sessions robbed Pollock of his rawness and made Pollock come to feel disingenuous about doing things for the camera that he had originally done spontaneously.
Art critic Jonathan Jones suggests that by filming Pollock, Namuth "broke the myth of trance" and by framing Pollock's work in the larger surrounding landscape, destroyed Pollock's view that his paintings were boundless.
Jeffrey Potter, a close friend of Pollock's, described Namuth as commanding, frequently telling Pollock when to start and stop painting.
According to Potter, Pollock "felt what was happening was phony."
Namuth himself describes Pollock as being "very nervous and very self-conscious" of the filming at the time, but less so when Pollock discussed it in a later interview.
During his time with Pollock, Hans Namuth had created two films and captured more than 500 photographs of the artist.
These photos were first published in 1951 in "Portfolio", a journal edited by Alexey Brodovitch and Franz Zachary.
After the death of Pollock in 1956, Namuth's photos grew in popularity and were often used in articles about the painter in place of Pollock's artwork itself.
Art historian Barbara Rose states that the photographs changed art by focusing on the creation of art rather than the final product alone.
Younger artists such as Bruce Nauman, Richard Serra, and Robert Morris were able not only to view Pollock's paintings, but, with Namuth's images, to see Pollock in the act of painting, giving rise to the popularity of Process Art.
These photos have also allowed art historians to dissect the details of Pollock's method.
For example, art historian Pepe Karmel found that Pollock's painting in Namuth's first black-and-white film began with several careful drippings forming two humanoid figures and a wolf before being covered beneath several layers of paint. 
Although largely used to describe unawareness of impairment after brain injury or stroke, the term 'anosognosia' is occasionally used to describe the lack of insight shown by some people who suffer from a mental illness such as bipolar disorder or psychosis.
They do not have the insight to recognize that they suffer from a mental illness.
There is evidence that schizophrenic anosognosia may be the result of frontal lobe damage. 
Pollock is a surname of English origin.
It may have derived from the fish of the same name, see Pollock.