SORU: aşağıdaki parçaya göre cevaplayınız
As one understands from the passage, with their clinical trial, Mayberg and her colleagues ----.
Treating depression could change significantly
following the results of a small Canadian clinical trial
that ended in 2005. The procedure used in the study
freed several patients from heavy depression that
had resisted medication, talk therapy and even
electroconvulsive (shock) treatment. Study co-author
Helen S. Mayberg cautions that any trial so small
– just six patients – must be considered provisional.
Yet four of the six subjects felt dramatic and lasting
effects. University of Toronto neurosurgeon Andres
Lozano implanted battery-powered, pacemakerlike
devices underneath a patient's clavicle, then ran
flexible, hair-thin electrodes to the subgenual
cingulate, a well-buried cortical area that Mayberg
had previously found active in depressive or sad
states. The electrodes delivered pulses of four volts,
130 times a second. Mayberg hypothesized that in
badly depressed patients the subgenual cingulate
acts like a switch left open, allowing depressive
circuits to fire more than is necessary. Her results
suggest that the regular stimulation might moderate
that activity. In 2005, after a year of living with the
continuous impulses, the four patients had lowered
their scores on the Hamilton Depression Rating
Scale from the soul-deadening high 20s to between
one and eight – quite healthy.