Showing posts with label cerebrum. Show all posts
Showing posts with label cerebrum. Show all posts

Sunday, 27 March 2011

0 Mind Control How To Strengthen Your Will

Mind Control How To Strengthen Your Will
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David Blaine - the 38-year-old self-described "endurance artist' who once encased himself for seven days in a plastic coffin with no food and little water - credits willpower training for his amazing feats. "Getting your brain wired into little goals and achieving them helps you achieve the bigger things you shouldn't be able to do,' he told Roy Baumeister in the Florida State University psychologist's new book, "Willpower.' "It's not just practicing the specific thing.'

In dozens of studies conducted over the past 25 years, Baumeister has found that taking on specific habits - like brushing your teeth with the opposite hand you'd normally use - can increase levels of self-control. In a phone interview, he likened willpower to a muscle: "If you exercise it, you can make it stronger. There's nothing magical about it.'

He and others have also identified a host of things that can drain our willpower, including hunger and fatigue, while neuroscientists are struggling to understand exactly how the brain's higher reasoning center - the prefrontal cortex - manages conflicting wants and needs to help us make the right decisions. The reason for all this interest? Willpower, it turns out, is one of the most important predictors of success in life.

While small studies through the years have linked high levels of self-control to better health, relationships, and finances, a landmark study published this past January provided the strongest evidence to date. In the study, Duke University researchers culled data from a group of more than 1,000 New Zealand young adults followed for three decades and found that those who scored high on tests for self-control when they were 3 years old were far more likely to be healthy and financially successful as adults than those who did poorly on the self-control tests in preschool.

Facing a decision over whether to eat a nutritious apple or decadent chocolate bar activates the brain's prefrontal cortex. The right side propels you to say no to the chocolate temptation while the left side encourages you to say yes to the apple to curb your hunger.

The researchers took into account differences in childhood socioeconomic class and IQ scores, and determined that 11 percent of those with the highest levels of self-control as children had multiple health problems as adults, such as obesity, gum disease, and sexually transmitted diseases, compared with 27 percent of those with the lowest levels of self-control. Thirteen percent of those with high self-control had been convicted of crimes compared with 43 percent of those with the lowest levels, and just 10 percent in the high self-control group earned less than 17,000 a year compared with 32 percent in the lowest group.

The researchers also found that self-control variations among siblings pointed to their success decades later. "Differences between children in self-control predicted their adult outcomes approximately as well as low intelligence and low social class origins,' wrote the study authors.

Those striving to complete a marathon, a diet, or a doctoral dissertation can gain the willpower to help reach their goals by doing little self-control tasks throughout the day, like fixing their posture, avoiding curse words, or controlling their temper at home, according to Baumeister. And those who engage regularly in high-willpower activities like exercise, meditation, or learning a new language or craft tend to exhibit higher levels of self-control in other areas of their lives. Neuroscientists believe these acts reinforce neural pathways in the brain's prefrontal cortex that help us say "yes' to our goals and "no' to procrastination and temptation.

The brain's ventromedial prefrontal cortex helps with goal planning and the making of longterm decisions. It holds memories of what type of person you believe yourself to be and helps you act like that person.

Exerting willpower, however, requires the brain to use a lot of energy in the form of glucose, which it may not have if you are hungry or not able to metabolize glucose as efficiently due to lack of sleep or stress. "All of these things cause mild dysfunction in the prefrontal cortex,' said Stanford University psychologist Kelly McGonigal, author of the forthcoming book "The Willpower Instinct.' "It's as if you have brain damage in areas you need to have self-control. And that turns you into the worst version of yourself' - the one who snaps at the kids, misses the work deadline, and attacks the ice cream in the freezer.

Recent brain imaging studies indicate that different regions of the prefrontal cortex are responsible for different elements of willpower. The left side revs you up and gets you moving through your to-do list, while the right side helps you avoid temptations that derail your diet, work, or exercise regimen. A smaller brain region in the middle - called the ventromedial prefrontal cortex - helps you weigh the myriad decisions coursing through your mind minute to minute. Should you check your Facebook feed or write that memo? Will you have a chocolate chip cookie or an apple? How will you respond to your child's whining?

The anterior cingulate cortex regulates conflict that arises as soon as you want that piece of chocolate. It notices craving and sends signals predicting what will happen if you do eat the chocolate and what will happen if you don't.

Those with high levels of self-control often make better decisions because they consider long-term goals rather than just the instant gratification, due possibly to better coordination among all of their brain regions involved in willpower. When California Institute of Technology researchers performed functional MRI scans on 37 dieters for a 2009 study published in the journal Science, they found that dieters with high levels of self-control considered both health and taste when making food choices and that both their ventromedial prefrontal cortex and their left prefrontal cortex were highly active when making these choices. Dieters with low self-control considered only taste when making food choices and had high activity in their ventromedial prefrontal cortex, with much lower activity in the other brain region.

"We're still trying to figure out the basic mechanisms by which the prefrontal cortex controls willpower,' said Earl Miller, a professor of neuroscience at the Massachusetts Institute of Technology who studies the neural circuitry of self-control. "We know that those who have damage to their prefrontal cortex due to a stroke or other brain injury often behave in a reflexive, mindless way' without any thought of consequences. But, he adds, researchers still haven't figured out exactly how the brain learns appropriate behavior like muting a cellphone during a concert or whispering in a library.

What is clear is that just like a muscle, willpower can get depleted when it's overused. In a 2009 study involving 84 college students, Baumeister found that those assigned to write an essay without using words containing common letters - which required a lot of willpower - were more likely to dishonestly report their scores on a subsequent math test to earn a small monetary reward than those who were instructed to write an essay without the same restrictions.

Yes, being honest and avoiding the temptation to cheat both require self-control.

"What I learned is that everything comes out of the same pot,' Baumeister said. "There are times when you have to give yourself a break and realize that when you're coping with high demands at work, you may not have much willpower left when you get home.'

That could mean doing a shorter workout that day, putting off the bill-paying until tomorrow, or doing an activity that requires minimal effort from the brain, like a bubble bath - all of which allow your willpower muscle to rest and grow stronger. During times when you need to push through a gargantuan set of tasks, research suggests that ingesting a small amount of sugar, like a half a can of cola or a few jelly beans, can provide the brain with the extra glucose it needs to exert more self-control. (Emphasis here is on small amount, according to Baumeister, who conducted studies on this.)

While we all give in to sinful urges on occasion, berating or shaming ourselves into getting back on course may actually be counterproductive, said McGonigal, leading to more slip-ups down the road. One study found that those who forgave themselves for failing at a task were more likely to brush themselves off and try again, while other researchers demonstrated that dieters given a pep talk after eating a doughnut - emphasizing that one small setback wouldn't ruin all their hard efforts - were less likely to indulge later on than doughnut eaters who didn't have the talk.

"If we want to have more willpower, we have to learn to be a friend and mentor to ourselves,' said McGonigal, "rather than equating self-control with self-criticism.'

Friday, 21 March 2008

0 Neuroscience Sheds Light On Why People With Aspergers Syndrome Lack Empathy

Neuroscience Sheds Light On Why People With Aspergers Syndrome Lack Empathy
Families of those with Asperger's want to know "why "their Aspies act the way they do. In my psychology practice I have Neuro-typical (NT) clients repeatedly ask me regarding their Asperger spouse, "Why can't she "see" what I am saying?" Or they ask, "Why can't he "connect" with my feelings?" Aspies have a huge disconnect between thinking and feeling, or cognitive empathy (CE) and emotional empathy (EE). But what is the cause of this disconnect? That's the real "why" question. According to the latest neuroscience research discussed in Simon Baron-Cohen's book, The Science of Evil: On Empathy and the Origins of Evil, the cause is poorly working empathy circuits in the brain . The Aspie brain has limited neurological mechanisms in place to understand or empathize with the NT. A way to understand the Aspie's lack of empathy from a neurological perspective is "out of brain - out of mind." No matter how much we explain or teach or train the Aspie mind, certain neurological circuits don't work as they do in the NT brain. The brain has a number of circuits that are all connected like Christmas lights. If one part doesn't work right, then the rest of the circuits malfunction, too. These brain circuits are so tightly integrated that multiple circuits depend upon multiple other circuits to carry out sophisticated human behaviors and to comprehend complex thoughts and feelings. Our brains are truly amazing. True empathy is the ability to be aware of one's own feelings and thoughts at the same time you are aware of another person's feelings and thoughts (or several other persons'). It means having the wherewithal to speak about this awareness. It also means creating mutual understanding and a sense of caring for one another. That is a lot of brain circuits to connect! Let's look at a sampling of brain parts in the empathy circuits to learn what they actually do for us. Realize that each part is not so functional by itself but needs the other circuits to carry out the complex empathy task of really stepping into the shoes of another person. * The medial prefrontal cortex compares your perspective to another person's perspective. * The dorsal medial prefrontal cortex helps you understand your own thoughts and feelings. * The ventral medial prefrontal cortex stores information about how strongly you feel about a course of action. * The inferior frontal gyrus helps with emotion recognition. * The caudal anterior cingulate cortex is activated with pain, both when you feel yours and observe it in others. * The anterior insula is involved in bodily self-awareness, something that is tied to empathy. * The right temporoparietal junction helps you judge another person's intentions and beliefs. * The amygdala plays a central role in empathy because of its connection to fear, thereby cueing you to look at someone's eyes to help you gather information about that person's emotions and intentions. People with Asperger's Syndrome avoid eye contact unless they are specifically instructed to look someone in the eye. Think of all the information that is lost by not looking into someone's eyes. * The mirror neuron system connects several parts of the brain. It responds when you engage in an action and when you observe others engage in an action. For example, these neurons fire when you gaze in a certain direction or observe another person gazing in the same direction (hence, "mirroring"). The interplay of these multiple and interacting empathy circuits is complicated. Your mirror neurons make you look in the same direction as the speaker, but you also need other empathy circuits to make meaning of why you are looking. These are just a few regions of the brain's empathy circuits. You can see that it's a very complex system. If a single one of them doesn't work, the whole network suffers, and so do our relationships. For example, your mirror neurons may signal you to mirror a speaker and look in the same direction he or she is looking, but they don't tell you why to look in the same direction. Your caudal anterior cingulated cortex may signal that another person is experiencing pain, but it doesn't signal you to speak about it-or give you a clue as to what to say. The brain's empathy circuits must work together in a complex system, sending signals back and forth, to create an integrated and highly sophisticated "lights on" response. Remember, it is not empathy unless you respond appropriately to the other person. "Will Aspies always be like this?" Researchers and clinicians aren't sure. There are some promising therapies. So far we really have as little information on successful clinical interventions as we do on the genetic and neurological structure of the brain. For now the bottom line is that NTs need to turn on the lights for their Aspie mates and children. Helping Aspies through the mysterious world of nonverbal and verbal empathy is not so stressful if NTs don't take it personally. It is equally true that Aspie family members must accept coaching by their NT spouse as well as by the family psychologist. That requires a great deal of love and acceptance on the Aspie's part. Both the NT and the Aspie need to look to the good intentions behind the clumsy behaviors and bad manners. Each partner needs to be respectful of, kind to, and patient with each other. The Aspie needs to recognize that he or she does indeed have zero degrees of empathy. And, the Aspie needs to stop expecting that his or her grasp of the facts should rule. The NT needs to recognize that zero degrees of empathy can co-exist with feelings of caring. If an AS/NT couple is going to be successful, both parties need to work with the other's systems. That provides you with a place to start creating a pattern of working together for the sake of the family, as long as you both have loving intentions. REFERENCE Baron-Cohen, Simon. (2011). The Science of Evil: On Empathy and the Origins of Evil. New York: Basic Books, Inc. Baron-Cohen suggests the cause of an Asperger's sufferer's lack of good social skills is poorly working empathy circuits in the brain.
 

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