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You probably have a general understanding of the human brain: a network of nerve cells connected by synapses.

MND is an incurable condition where nerve cells which control muscles gradually stop working.

There's a specific strain of campylobacter, which has a sugar-coated outer layer, and in rare cases, its molecular structure matches the coating of human nerve cells.

It reflects how nerve cells, or neurons, in the brain's cortex respond to stimulation and plays a key role in cognitive functions like learning and memory, information processing, decision making, motor control, wakefulness and sleep.

The received wisdom said we were built from around 200 types of cell – such as heart muscle or nerve cells.