Vlad R. Baciu - composer & conductor

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https://www.romania-muzical.ro/articol/new-songs-from-europe-16-turneu-internaional-cu-premiere-mondiale-susinut-de-soprana-christine-simolka-i-pianistul-rene-wohlhauser/3884181/2631/1

Hyperpolarization is a work dedicated to Ștefan Diaconu (piccolo, flute, blockflöte, voice) and Eugen-Bogdan Popa (cello, voice) and was written on a theme by Girolamo A. Frescobaldi. This piece proposes to the listener a journey through time, related to the action potential of neurons, which has 3 phases: depolarization, repolarization and hyperpolarization.

Starting from contemporaneity (1 - depolarization), we will be carried into the future (2 - repolarization). Suddenly, we are back to the first sounds once perceived by human kind, the sounds of nature (3 - hyperpolarization). Subsequently, these sound emblems will be enhanced, leading to the music of Girolamo Alessandro Frescobaldi 1583 -1643 (phase 3 to 1), from which we gradually propose another possible future, rooted in contemporaneity (1).

Beginning with the first phase of the action potential, we can explain the following: when the number of positive ions outside the neuron's membrane reaches a certain limit, the voltage channels open, allowing the positive natrium ions to enter the neuron's inner membrane. With the influx of natrium ions, the interior of the neuron depolarizes (1 - contemporaneity), and the electrical charge rises from about -70mV to +30mV.

Repolarization (2 - future) is the rapid return to the resting state by opening ion channels that allow potassium ions to exit the soma of the neuron.
As the potassium ions leave the neuron, there is an increase in negative electrical charge, below resting state, which is in fact hyperpolarization (3 - nature sounds and later Frescobaldi in the present piece), i.e. -90mV so below resting state.

Subsequent to hyperpolarization, the neuron must return to the resting electrical charge of -70mV before it can produce a new action potential, in other words: "Search the past (Hyperpolarization) if you want to predict the future" - Confucius.

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Hyperpolarization - Vlad R. Baciu || Stefan Diaconu, Eugen Bogdan Popa Hyperpolarization is a work dedicated to Ștefan Diaconu (piccolo, flute, blockflöte, voice) and Eugen-Bogdan Popa (cello, voice) and was written on a theme b...