THE EXTENDED MIND

A look at the science behind the parts of our consciousness and ideation that lie outside the body.

Marshall McLuhan famously called media “the extensions of man.” Science writer Paul updates this notion to battle what researchers have called neurocentric bias “and our corresponding blind spot for all the ways cognition extends beyond the skull.” We acquire much information via the processing of the senses into mental furrows and synapses, but we also have other avenues of thinking: for instance, what Paul describes as a well-developed “interoceptive sense.” This involves teaching ourselves how to become more aware of what’s happening in our bodies through an exercise called the “body scan,” imagining that breath occurs elsewhere in the body than in the pulmonary tract. Mindfulness meditation also extends awareness of the parasympathetic nervous system, itself a source of information. Paul examines the well-known effects of walking on mind improvement and the use of gesture to both build memory and to pull words out of the air (or mental databanks, more properly) as we speak. The author uses recently deceased Zappos founder Tony Hsieh as a model for someone who strived to forge “a sense of unity and cohesion among the firm’s employees,” re-creating the as-oneness he experienced at drug-fueled raves. The mind can be expanded, and not necessarily by drugs, by compartmentalizing it so that others store information for us. Intriguingly, Paul explores an experimental learning technique in which students are divided into groups and then assigned to learn a segment of a topic, later combining the information they’ve mastered in an example of “a transactive memory system.” Though less fluent than other popular-science writers such as Malcolm Gladwell and Elizabeth Kolbert, Paul does a good job of drawing together the many extensions of mind that surround us, exhorting readers to “re-spatialize the information we think about.”

It helps to have a brain to think with, but Paul capably shows that there’s much more to the process than all that.