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1 ene 1850 año - Sleep Substance

Descripción:

It was believed that sleep was caused by a kind of “sleep substance” or toxin that built up during the day and dissipated at night, or that sleep was regulated by blood flow, or that it was caused when nerve cells became paralyzed at night and unable to communicate with each other.

Añadido al timeline:

Sleep Medicine

ByPardeep Masuta
8 nov 2017
0
0
442

fecha:

1 ene 1850 año
Ahora mismo
~ 175 years ago
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