Back in the 70’s there was a lot of pop-science chatter about the left and right brain hemispheres. Right brained people, it claimed are creative, while left brained types are analytical. Pretty cool, huh? Cool, but inaccurate and misleading. We now know much more, and the research reveals something much more exciting!
While most systems are integrated across both brain hemispheres there are real differences between the two, but it’s not simply “emotion on the right, reason on the left”. When we talk about the right/left lateralization of the brain, we’re saying that some functions are carried out in one hemisphere more than the other; it’s about specialization. While there are differences between right handed, left handed and ambidextrous people, in general the specialization is as I describe it below.
Areas of the right hemisphere are specialized to deal with aspects of the physical and emotional self. Strong emotions like anxiety and terror activate the right brain. The right hemisphere has many more connections to the emotional heart of the brain, the limbic system. It’s also more connected to the rest of the body, notably the viscera – your gut.
The left hemisphere is specialized in organizing the conscious linguistic self. It’s better at problem solving and is inclined towards positive emotions. The left brain is the more social of the two halves: It’s engaged when someone approaches you and also when you’re angry with someone. The left brain thinks in a linear, sequential way and has less of a connection with the rest of the body than the right brain.
We all have an instinctive ‘fight, flight, freeze’ response to danger, and the right brain is tied into that. Because it processes information in a holistic way, the right brain quickly gets the big picture, and it’s always checking; is that picture safe or possibly dangerous? Perhaps because we’re wired to look for danger, the right hemisphere is more concerned with negative emotions. When you look at a distressing image, the right hemisphere is activated and depression seems to be linked with increased right brain activity. Many right brain specializations are concerned with things outside our immediate awareness, so we can think of it as the home of the unconscious mind. As Louis Cozolino explains:
“When we are awake, the right hemisphere silently provides information to the left, which we experience as intuition, feelings, and visual images” (Cozolino, 2017).
Both halves of the brain have a vital role to play, and mental wellbeing requires a balance and integration between the two. All this has profound implications for psychotherapy. Anxiety, depression and psychosis have all been linked to poor integration between the left and right brain, so does therapy help integration? The short answer is yes, but a more thoughtful discussion will follow in my next blog post.
- Christian Jarrett: Why the left brain right brain myth will probably never die.