The heart has its reasons, of which reason knows nothingBlaise Pascal
Anyone watching The Last Dance on Netflix over the last couple of weeks has seen what it is like to be in an embodied state of flow. Seeing Michael Jordan playing basketball is to be reminded of how much the exertion of expert physical skill is devoid of our self-conscious awareness. When watching MJ drive to the hoop, or sink an impossible layup in traffic, it is like watching poetry in motion. A kind of magic connecting body, mind and soul in a symphony of coordinated movement. This state of flow is an immersed engagement in your environment, a oneness between doing and being, a sequence of time, where time itself seems to have disappeared. What is interesting about this state is how internal thought and fixation of ourselves stops when we are engrossed in a task. Why this takes place is of particular interest to researchers and their understanding of the brain and mental functioning.
Flow State’s and the Default Mode Network
This ‘flow’ state has been investigated using neuroimaging and has been shown to represent a decrease of activity in a structure of the brain called the default mode network. This network is responsible for much of our mental processes when we are not focused on the external environment, in other words our internal chatter and mind wandering. These processes include self-reflection, mental time travel, mental constructions (ideas), moral reasoning and it is believed to be the network of the brain that contributes to our sense of self.
In a study investigating flow states, tasks that were rated by participants as ‘boring’, corresponded with neuroimaging data that showed higher activity in the default mode network, whilst ‘flow state’ activities corresponded with decreased activity. The network of structures in the brain responsible for creating that sense of what it is like to be you, are essentially switched off in these states of immersion. The default mode network is of particular interest to neuroscientists, psychologists and psychiatrists as there is a belief that a hyperactivity in this network of the brain could be the neurological basis for the development of mental disorders.
The idea of investigating psychedelic experiences for treating mental disorders is not new. Michael Pollan, in his book How to Change Your Mind, tells the story of how psychedelic science was a promising and legitimate field of inquiry in the 1950s and 1960s. Unfortunately, due to concerns relating to the growing counterculture and anti-war movement, the Nixon Government banned these compounds, effectively shutting down a promising line of research. Robin Carhartt-Harris, David Nutt and their team at Imperial College London, are two researchers at the vanguard of this renaissance and some of their theories related to the default mode network have significant implications for our understanding of psychedelic experience, the brain and mental disorder. Carhartt-Harris and his team found that the brain and in particular the default mode network, under the influence of psychedelics, exhibited decreased levels of activity, similar to those found in states of flow.
The brain is a hierarchical system, with the more recent, evolved parts, including key parts of the default mode network, exhibiting an inhibitory or repressive effect on the lower parts of the brain. Carhartt-Harris and his team argue, that the default mode network acts like the conductor of an orchestra, repressing the chaos of everyone playing their own tune, keeping the different parts in harmony. The neuroimaging research conducted showed that during psychedelic experiences, this conducting part of the brain essentially switches off, allowing for increased connectivity between different areas which are usually not in communication.
The Entropic Brain Hypothesis
This research by Carhartt-Harris and his team led to the publishing of a theory called The Entropic Brain Hypothesis, a theory which suggests that our ‘normal’ waking consciousness is the result of a slightly skewed balance between flexible and rigid states. Entropy is defined as the level of uncertainty in a system, and, as can be seen below, high entropy states are associated with flexible thought, like creative or ‘dream-like’ thinking, whilst low entropy states are associated with rigid thought, characterised by obsessiveness and addiction.
Psychedelic experiences, emotion and sensation
In a 2018 paper researching the effects of psychedelics, researchers using neuroimaging, found that LSD induces increased connectivity in the sensory and somatic motor areas of the brain. This network of neurons is mapped to the sensory experiences of our body, indicating that LSD increases these signals, whilst decreasing connectivity in the areas of ‘associative thinking’, which include the prefrontal cortex, responsible for most of our executive function. This increased connectivity also extended to the amygdala, which is heavily involved in the emotional processing of stimulus. So a psychedelic state is exhibited by high sensitivity to sensory information, increased emotional response and the reduced executive functions relating to internally focused thought (thinking of the past and future, and mental constructions of self).
What is interesting about this research is that the psychedelic state is not associated with a higher form of consciousness, but in fact a more primal, or primitive form of consciousness. The quieting of the default mode network appears to open the door to elements of our subconscious experience that are not usually available to us. The question then becomes, why do many mental health professionals believe that this state can have positive outcomes for patients?
Mental disorders including depression, obsessive compulsive disorder and post-traumatic stress, are characterised by mental constructions that can become rigid and debilitating. One theory of why these experiences have positive outcomes, is that they act as a ‘circuit-breaker’ of these rigid patterns of thought, allowing patients to regain perspective. Another possibility is that these experiences, when accompanied with psychotherapy, allow patients to access memories and emotions that are otherwise unavailable, facilitating catharsis and acceptance.
This research appears to show that psychedelic experiences allow for some of these rigid mental constructions to be switched off, providing a reset and a new, balanced perspective.
The Divided Brain
A sense of balance between competing ways of viewing the world is exactly what is proposed in Iain McGilchrist’s magnum opus The Master and his Emissary. This book, twenty years in the making, detailed the neurological research into the different “views” of the left and right hemispheres of the brain. McGilchrist makes clear that, despite the burgeoning amount of pop psychology stating otherwise, both hemispheres are involved in what the brain does.
Where things differ however, is in how the brain does what it does and how the different hemispheres ‘view’ the world. The left hemisphere’s view is more sequential and fixed, processing information linearly toward some objective that it has picked out of the broader context. In contrast, the right hemisphere takes a broader, big picture view of the world, developing implicit understanding (as opposed to knowledge). This includes the understanding of metaphor, imagery, an ability to see patterns and read facial expressions and to appreciate art and the harmony and melodies of music.
One of McGilchrist’s central concerns, is that the left’s fixed, sequential, linear view of the world leads to a re-presentation of reality, one devoid of the broader context. According to McGilchrist, the left hemisphere’s view is a reproduction, essentially a virtual reality, which is mostly interested in objects and ‘things’ as opposed to people and the environment. When our representation of reality becomes detached from the broader context for long periods, our experience can become what he terms, a ‘hall of mirrors’; an oppressive sense of being trapped within the mental constructs of our own thoughts.
This sense of being trapped in the hall of mirrors maps onto the type of rigid thinking typified by a low-entropy state in The Entropic Brain Hypothesis. Psychedelic experiences appear to open a door to this hall of mirrors, allowing a window to the outside world, a reset and rescue from the matrix of the associating minds representation of reality. There is a clear overlap between flexible or rigid thinking and the left and right hemisphere’s view of the world, between the grasping and sequential processing of the more rigid, left hemisphere and the contextually rich, intuitive understanding of the more flexible view of the right. Thousands of years of ancient spiritual traditions have spoken of the need for balance in the way we view the world and current psychological and neuroscientific research appears to have now caught up.
Bringing it all together
Whilst our sense of self and our ability to plan and reason are critical to our daily lives, it appears that these elements of our thinking can become counterproductive if they do not take into account a broader context. With the increasing digitisation of our leisure, work and social interactions there seems to be a creeping tendency to allow a more fixed, re-presented view of the world to dominate, potentially contributing to the significant increases in depression globally. Psychedelic experiences have been shown to be an effective treatment for many individuals suffering from intractable mental disorders. Organisations like MIND Foundation in Europe and Mind Medicine in Australia, along with many others, are working to educate mental health professionals, governments and the wider community as to their benefits and risks. By building awareness about these experiences, along with an understanding of who might benefit, we can remove some of the ‘war on drugs’ dogma that has shut down any debate regarding these treatments and begin to build a new paradigm of understanding for mental health treatments.