the routine of daily life… can dull things into what Heidegger called inauthenticity (left hemisphere), through the very weight of familiarity, and in my terms its left hemisphere re-presentation comes to take the place of the thing itself
McGilchrist maps Heidegger’s distinction between authenticity and inauthenticity directly onto his neurological thesis, identifying left-hemisphere re-presentation as the mechanism of Heideggerian dulling and Vorhandenheit as the shock enabling re-encounter with the real.
, The Master and His Emissary: The Divided Brain and the Making of the Western World, 2009thesis