Panta Rei

The man


πάντα ῥεῖ. Everything flows. Everything moves. Makes way. Changes. Is in flux.

πάντα ῥεῖ or Panta Rei, is a statement in ancient Greek attributed to the philosopher Heraclites. The statement means ‘Everything Flows’. 

Not much is known of Heraclitus of Ephesus, a key figure in philosophy, thought to have lived around 500 BC, and lovingly called ‘the weeping philosopher’. We have none of his original texts to study, no real account of his life, other than the words other key figures such as Plato have prescribed to him. The river analogy might be his most famous, now known in popular culture as the statement ‘You can never step into the same river twice’. 

Our Symposium’s Motto

Heraclites’ famous words Panta Rei or Everything Flows form the motto of our symposium as they represent the many aspects of ultrasound brain imaging and neuromodulation combined in our programme.

Ultrasound-based imaging such as Doppler-imaging relies on blood flow. Neuromodulation of the brain, be it directly through electrical stimulation or ultrasound-based neuromodulation, depends on flow of current. With the use of functional Ultrasound (fUS), which is neurovascular coupling based, we rely on the coupling of blood and current flow. As such everything flows, is in flux and changes, including the field of ultrasound-based imaging and neuromodulation itself. An interesting recipe for a symposium!

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