Can what you eat effect your brain?

Here’s one study which looked at gut bacteria and the emotional and sensation regions of the brain: UCLA study. Clearly further studies are needed, but it’s interesting to note that probiotics may help with mood disorders. Hmmmm….

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Can cognitive behavioural therapy really change our brains?

The BBC website recently posted an article about the above title. It’s a good article about CBT so I thought I’d share it below.

What is cognitive behavioural therapy?
CBT is based on the idea that problems aren’t caused by situations themselves, but by how we interpret them in our thoughts. These can then affect our feelings and actions.

Situation affects thoughts, which then affect feelings and actions The way we think about a situation can affect how we feel and how we act
For example, if someone you know walks by without saying hello, what’s your reaction?

You might think that they ignored you because they don’t like you, which might make you feel rejected. So you might be tempted to avoid them the next time you meet. This could breed more bad feeling between you both and more “rejections”, until eventually you believe that you must be unlikeable. If this happened with enough people, you could start to withdraw socially.

But how well did you interpret the situation in the first place?

Common errors in thinking style
Emotional reasoning – e.g. I feel guilty so I must be guilty
Jumping to conclusions – e.g. if I go into work when I’m feeling low, I’ll only feel worse
All-or-nothing thinking – e.g. if I’ve not done it perfectly, then it’s absolutely useless
Mental filtering – e.g. noticing my failures more than my successes
Over generalising – e.g. nothing ever goes well in my life
Labelling – e.g. I’m a loser

CBT aims to break negative vicious cycles by identifying unhelpful ways of reacting that creep into our thinking.

“Emotional reasoning is a very common error in people’s thinking,” explains Dr Jennifer Wild, Consultant Clinical Psychologist from Kings College London. “That’s when you think something must be true because of how you feel.”

CBT tries to replace these negative thinking styles with more useful or realistic ones.

This can be a challenge for people with mental health disorders, as their thinking styles can be well-established.

How do we break negative thinking styles?
Some psychological theories suggest that we learn these negative thinking patterns through a process called negative reinforcement.

Spider Graded exposure can help people confront their phobias:
For example, if you have a fear of spiders, by avoiding them you learn that your anxiety levels can be reduced. So you’re rewarded in the short term with less anxiety but this reinforces the fear.

To unlearn these patterns, people with phobias and anxiety disorders often use a CBT technique called graded exposure. By gradually confronting what frightens them and observing that nothing bad actually happens, it’s possible to slowly retrain their brains to not fear it.

How does cognitive behavioural therapy work on the brain?
Primitive survival instincts like fear are processed in a part of the brain called the limbic system. This includes the amygdala, a region that processes emotion, and the hippocampus, a region involved in reliving traumatic memories.

β€œIt seems that CBT really can change your brain and rewire it.”
Dr Paul Blenkiron, Consultant Psychiatrist

Brain scan studies have shown that overactivity in these two regions returns to normal after a course of CBT in people with phobias. What’s more, studies have found that CBT can also change the prefrontal cortex, the part of the brain responsible for higher-level thinking. So it seems that CBT might be able to make real, physical changes to both our “emotional brain” (instincts) and our “logical brain” (thoughts). Intriguingly, similar patterns of brain changes have been seen with CBT and with drug treatments, suggesting that psychotherapies and medications might work on the brain in parallel ways.

How effective is cognitive behavioural therapy?
Of all the talking therapies, CBT has the most clinical evidence to show that it works. Studies have shown that it is at least as effective as medication for many types of depression and anxiety disorders. But unlike many drugs, there are few side effects with CBT. After a relatively short course, people have often described long-lasting benefits.

“In the trials we’ve run with post-traumatic stress disorder [PTSD] and social anxiety disorder, we’ve seen that even when people stop the therapy, they continue improving because they have new tools in place and they’ve made behavioural and thinking style changes,” Dr Wild explains.

CBT may not be for everyone, however. Since the focus is on tackling the here and now, people with more complicated roots to their mental problems which could stem from their childhood, for example, may need another type of longer-term therapy to explore this. CBT also relies on commitment from the individual, including “homework” between therapy sessions. It can also involve confronting fears and anxieties, and this isn’t always easy to do. Ultimately, as with many types of treatment, some people will benefit from CBT more than others and psychologists and neuroscientists are beginning to unravel the reasons behind this.

The Brain – a few resources

One of my areas of interest has been the brain. There are all sorts of cool books about the brain. Mapping the Mind by Rita Carter is one of the books I’ve really enjoyed reading. The book talks about how brain scans explain our behaviours, particularly those which are different from the norm. If you are teaching an AP Psychology course, you can find some fabulous information to share with students during the Brain & Behaviour or Development sections (you can use it in Intro Psych too at the high school level but some of it may be a bit too deep). My particularly favourite chapter is called Higher Ground, which focuses on consciousness and the processes involved.

My favourite book on the brain is by V.S. Ramachandran, Phantoms in the Brain. V.S. Ramachandran addresses some questions that we all ask ourselves – “What is the self?” and “Why do we see things the way we do?”. He talks about his experiences with patients who have some type of brain injury. These patients have helped him understand how the brain works. My favourite chapter is Zombies in the Brain, where he speaks about seeing and understanding what we see – and that sometimes we don’t clearly interpret what is in front of us. It’s very cool!

The other area of interest for me is in the teenage brain, since that is who I tend to work with most. I found a great Ted Talk by Sarah-Jayne Blakemore. She talks about the dramatic changes that the brain undergoes during this period. The information that we are exposed to determines which synapses are strengthened and which are pruned. I think this would be a great conversation starter with teenagers…so what experiences do you think would be best for you to experience during the time between your childhood and adulthood to allow your brain to develop the best?

There are so many other resources out there about the brain depending on your area of interest and much of it is easy to digest for the average person. I can’t wait to see what new information comes to light as researches continue the quest to understand how we think, feel and behave!