Can brain damage lead to extraordinary art?

In recent years, neurologists have observed several intriguing cases of artists with progressive brain damage or dealing with the aftereffects ofstrokes. In one case, researchers evaluated an artist's entire career of paintings, both before and after her medical condition began causing brain damage. The observers determined that the paintings created later in the disease's progression showed more artistic skill but also appeared unfinished and less emotionally impactful [source:Harding]。The scientists performing the study concluded that the damage to the woman's temporal lobe allowed her to operate more freely as an artist, likely contributing to the perceived increase in artistry, but also hampered her ability to connect with and finish her work.

In May 2005, Swiss neurologists published the results of a study on two visual artists whose post-stroke work was markedly different from their pre-stroke work. One of the artists, who suffered damage in an area of the brain connected with forming mental images, started painting in a more abstract style. (In contrast to this case, other studies have shown that left hemisphere damage can hinder a person's ability to paint in an abstract or representational manner [source:ABC Science Online]。)

The other artist, whose brain damage occurred in a region affecting creativity, began to paint more realistically and with brighter colors. He also started using his left hand more often, whereas before he'd beenambidextrous. But perhaps the most fascinating development was that both artists saw no differences in their post-stroke work. To them, it looked the same as their earlier artwork.

What these cases generally have in common is a tendency for a damaged brain to produce markedly different and often more free-form art. To judge a painting's aesthetic value is fairly subjective, so it's difficult to state definitively that these artists produced "better" art after suffering brain damage. But their art certainly changed, and cases like these indicate that damage to the left temporal lobe often changes long-established artistic habits or unlocks a previously unknown creative impulse.

Similar effects have been observed in patients with progressive brain damage fromfrontotemporaldementia(FTD). Some FTD patients have shown startling new talents in art and music and an obsessive focus on exercising these skills. Brain scans of FTD-riddled brains show damage to the left temporal lobe and decreasedbloodflow. The results are similar to brain scans of autisticsavants, sometimes resulting in the label ofacquired savantbeing applied to these cases [source:Fox]。Acquired savants have also developed from suffering meningitis and serioushead injuries. (We'll take a closer look at autistic savants and art on the next page.)

The theory behind FTD patients who show heightened artistic skills states that brain damage to the left hemisphere breaks down the barriers preventing some people from expressing themselves visually, while simultaneously harmingmemoryand verbal skills [source: Treffert]. FTD essentially rewires the brain, producing noticeable physical effects. While some areas, such as those associated with language, suffer damage, portions of the right side of the brain, linked with visual learning, actually increase in thickness [source:Blakeslee]。

Many acquired savants showcase fascinating new talents, but most don't compare to those born with savant syndrome or who appear to acquire it early in life (think "Rain Main"). On the next page, we'll look at the connections between savant syndrome and art.

Savant syndromeoften appears in childhood, frequently as a result of autism but sometimes after an illness, stroke orseizure. The condition is characterized by remarkable artistic, musical or mathematical abilities, and often accompanied by brain damage, lowIQ, difficulty communicating and other disabilities. One common form of savant syndrome is the musical savant who has extraordinary musical ability combined with blindness and mental retardation [source: Treffert]. Only 10 percent of autistics have heightened abilities [source:Fox]。

Stephen Wiltshire, an autistic savant nicknamed "the human camera," can paint uncannily detailed vistas from memory [source:Wansell]。He also has perfect pitch -- perhaps the only savant with extraordinary talents in two fields [source:H.W. Wilson]。Noted neurologist Dr. Oliver Sacks called Wiltshire's progress in basic communication (he didn't say his first word until age 8 and couldn't cross the street on his own until he was in his teens), combined with his status as a world-renowned artist, a "miracle" [source:H.W. Wilson]。

There are varying theories as to why savants perform so magnificently in art or math with massively damaged brains. One acknowledged component is theobsessive focusthat all savants seem to share. It's a characteristic that stems from how the autistic brain develops, in which neurons in areas affecting emotion and social interaction don't fully develop or form proper connections. Consequently, many autistics have difficulty engaging with the world but find comfort in repeating certain tasks, such as drawing.

A related theory attests that savants engage incompulsive learning, obsessively studying a concept or skill.Calendar savantscan assign a day of the week to a date hundreds of years in the past or future. Some of these savants have been known to study calendars obsessively, but most appear to have at least some innate ability. One example is Timothy Rickard, who is blind and has the intellect of a kindergartener but is also capable of matching a day of the week to a historical date with a high degree of accuracy [source:Fox]。

Another attempt to unravel the mystery considers how autistic people see the world. Because the emotional and social centers of the autistic brain don't fully develop, autistics often see their surroundings in terms of components rather than abstractions.

Here's an example. If someone throws you a baseball, your brain automatically estimates various relevant factors: ball speed, direction, distance, time until arrival. It also considers environmental factors and how to move to catch the ball. But most of this is done subconsciously and very quickly. You probably don't even realize your brain is doing it and instead only see a ball and think about catching it. In a savant's thinking, the focus is on hard data, rather than the general conclusions drawn from them. So instead of thinking about catching a ball or enjoying a musical piece, he or she might think about precise aspects of a ball's flight or determine exactly (and very quickly) which notes are being played.

With the existence of acquired savant syndrome, some scientists speculate that all humans have the potential for savant abilities but that savants are somehow able to harness them, likely owing to how their brains have been "rewired" [source:Fox]。The future of this field of study may lie in being able to create acquired savants without the accompanying brain trauma. One researcher, Allan Snyder, director of the Center of the Mind, has usedtranscranial magnetic stimulationto temporarily upset the frontotemporal lobe, the same area where some dementia patients and autistic savants have brain damage. A portion of Snyder's test subjects showed a temporary increase in artistic ability.

If you'd like to read more articles on the brain, from whether it's hardwired for religion to the difference between men's and women's brains, try the links on the next page.