dial up

Discussion in 'English Only' started by rzezucha, Aug 17, 2012.

  1. rzezucha Senior Member

    dial up
    This expression appeared in such context:

    "Not suprisingly, then, the insula snaps to attention when it receives instructions (from other areas of the brain) to monitor heart rate. When this structure dials up its activity - by bringing online more neurons that receive input from the heart, for instance, or by enlisting more neurons to transmit these data to regions in the brain that do the actual counting - people are more sensitive to their heart rate.' (Richard. J. Davidson 'The emotional life of your brain')

    What does it mean in this context?
  2. Egmont Senior Member

    Massachusetts, U.S.
    English - U.S.
    This expression uses a metaphor of a control panel, in which one can increase something by turning a dial - for example, the volume of sound from a radio. You could write that the structure increases its activity.

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