Neurology

Consciousness is thought by many to define what it is to be human. We know that animals are conscious to some extent, but they don’t have what we have in that department. So if we can explain how human self-awareness works it will be a Rosetta Stone to understanding what makes our species so odd, or, depending on your view, so special. Also: big brains love exercise. And the great thing about this topic is that it can be tackled by biologists, neurologists, philosophers, physicists and even novelists. It’s an interdisciplinary, no-holds-barred intellectual wrestling match. Michael Pollan, an American journalist and academic who works at both Harvard and Berkeley, comes from a literature background but is fluent in the relevant science.

Oliver Sacks, who died in 2015, first came to public attention with his descriptions of fascinating neurological conditions in accessible articles and books. He was one of the first doctors to attempt to break down the barriers between the medical profession and the layman by eschewing esoteric jargon and explaining complex brain pathology simply while never losing sight of the patient as a human being. He exuded compassion and honesty. He brought attention to little-known illnesses such as encephalitis lethargica, or sleeping sickness, of which there was an epidemic after the first world war.

Jesus is a Malteser. You might say I’m a liar or accuse me of the most egregious heresy, but the fact remains that Jesus is a Malteser. This is because I have a neurological quirk known as synaesthesia, commonly described as a fusing of the senses. Its most common manifestation prompts people to see colour when they hear music. But my version is the rare lexical-gustatory kind, which means that I can taste words; and so Jesus is a Malteser, Sam is tinned tuna and Donald is a rubber duck bobbing around in vinegar. This could seem nightmarish: life as a constant assault of rubber ducks and whiffy fish — a gustatory whack-a-mole — but it produces no intrusion. I consider it nothing other than a party trick, although it can also be useful as an aide-memoire.