Entries in Touch (2)


What Makes 'That Loving Feeling?'

Thomas Northcut/Thinkstock(PASADENA, Calif.) – Ever wonder why brushing hands with your crush feels like a slow-motion caress, while that same brush of the hand by a bad date feels like a mistake?

Neuroscientists at California Institute of Technology say the reason the same touch can be both attractive and repulsive may lie in the way the brain registers it.

In their study published Monday in the Proceedings of the National Academy of Sciences, the researchers used functional magnetic resonance imaging to monitor the brain activity of 18 straight men as a female research participant gently stroked their legs.

The men could not see the woman. Although the same woman caressed their legs, the first time the men were told an attractive woman was caressing them and the second time they were told it was a man. Before each part of the experiment, they were shown a video of how to visualize the person caressing their leg, although, unknown to the participants, the image was not true to the actual person.

The researchers found that although the same person was giving the caresses, a part of the midsection of the brain called the primary somatosensory cortex became more active when the men believed an attractive woman was touching them as opposed to a man.

“Intuitively, we all believe that when we are touched by someone, we first objectively perceive the physical properties of the touch — its speed, its gentleness, the roughness of the skin,” said Valerie Gazzola, a co-author of the study. “Only thereafter, in a separate, second step based on who touched us, do we believe we value this touch more or less.”

But the findings suggest that the primary somatosensory cortex is less objective than previously believed, and that the two parts to processing touch — one of understanding the physical component, and the other of assigning emotion to it —  may not necessarily be true, Gazzola said.

The primary somatosensory cortex is thought to represent how touch feels on the skin, but the findings suggest that its activity is modified by what the participant thought of the caresser, according to Ralph Adolphs, a professor of psychology and neuroscience at Caltech and director of the Caltech Brain Imaging Center, where the experiment was carried out.

“We see responses in a part of the brain thought to process only basic touch that were elicited entirely by the emotional significance of social touch prior to the touch itself, simply in anticipation of the caress that our participants would receive,” said Adolphs.

These initial findings with only a small number of participants may not apply in a larger group. The researchers plan to test whether women’s brains would respond the same way as men’s did, and whether the brain would respond the same way across different sexual orientations.

“Nothing in our brain is truly objective,” said Christian Keysers, a co-author of the study. “Our perception is deeply and pervasively shaped by how we feel about the things we perceive.”

Copyright 2012 ABC News Radio


NBA Teams that Touch the Most Win the Most

Jupiterimages/Thinkstock(BERKELEY, Calif.) -- A pat on the back, a touch on the arm: could these be the keys to an NBA championship?  According to two scientists from the University of California, Berkeley, the answer is yes.

Michael Kraus and Dacher Keltner studied every team in the NBA and found that the teams that touched the most, won the most.

Toward the end of game three in the NBA finals, Miami Heat star Chris Bosh turns the ball over and is visibly unhappy exchanging words with a teammate.  He gets back on defense and gives that teammate, Dwyane Wade, two reassuring pats.

"There's one touch and another touch," said Kraus.  "It's one of those things where they're communicating, they're together, even though bad things are happening right now during the game."

Over the course of five games, the Dallas Mavericks lead the Miami Heat three games to two in the NBA finals.  As of game four in the best-of-seven series, the Mavericks were also winning in one key category: touches.

According to the Wall Street Journal, Dallas has had 250 "instances of televised contact" compared with Miami's 134.  The contact could be as simple as a high-five, as aggressive as a chest bump or as intimate as a butt slap.

"Touch instills trust," Keltner told ABC News.  "It contagiously spreads good will; it makes players play better on behalf of each other."

Off the court and in the lab, Kraus and Keltner have shown that humans have a remarkable ability to communicate emotions like love, sympathy, disgust and anger just by touching a stranger's forearm.  The findings hold true even if the person being touched can't see the person doing it.

Touch can trigger the release of oxytocin in the brain, a chemical that induces trust.  Researchers say anyone can use the power of trust in everyday life.

Studies have shown that waitresses who touch customers get better tips, doctors who touch patients receive more favorable reviews, and petition-gatherers who touch passersby get more signatures.

ABC News' Dan Harris decided to test the study on the streets by gathering signatures.  He found that 60 percent of the people he touched signed, compared with only 25 percent of the people he didn't touch.

There is one huge caveat.  Keltner cautions that there is a right time and place for everything.

"I mean, we always have to have common sense," he said.

When wielded wisely, touch has the potential to be very powerful.  And as if to prove this point, back in game three of the NBA finals, just minutes after Chris Bosh gave Dwyane Wade those two reassuring taps, Bosh hit the game-winning basket.

Copyright 2011 ABC News Radio

ABC News Radio