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Deep-brain stimulation is a new technique

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Deep-brain stimulation is a new technique  [#permalink]

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New post Updated on: 07 Oct 2018, 05:52
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D
E

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Deep-brain stimulation is a new technique for combating severe depression. In a recent experiment, electrodes were implanted into the brains of six patients who had not responded to any currently approved treatment for depression. When an electrical current to the electrodes was switched on, four of the patients reported feeling a dramatic reduction in depressive symptoms. The long-term prospects of the new treatment are not promising, however, because_________________.

(A) other treatments for depression may also be effective

(B) the other two patients reported only a slight reduction of depressive symptoms during the treatment

(C) deep-brain stimulation relies on the expertise of highly skilled physicians

(D) when the electrical current is interrupted, the effects of the treatment are reversed

(E) in a subsequent experiment, a one-hour treatment with the electrodes resulted in a sustained remission from depression in the four patients for six months

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Originally posted by apoorv601 on 05 Jun 2015, 03:09.
Last edited by Skywalker18 on 07 Oct 2018, 05:52, edited 1 time in total.
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New post 05 Jun 2015, 08:45
Electrodes reduces depression. But it is not good for long term.
How can this be possible?
1) May be the effect is only short-term.
2) OR (worse) effect is reversed

Points to Choice D straight away
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New post 05 Jun 2015, 11:40
Ans is d
explanation- If there is reverse action than definitely its not going to be effective.
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New post 06 Jun 2015, 07:13
D it is!

Had to be an option which negated the positive effect discussed in the passage above.
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New post 15 Sep 2017, 09:38
E is a common trap in gmat, test takers should know that the passage gives nothing about the subsequent experiment.
B is not enough.

There is a similar question, but the pattern is different.
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Re: Deep-brain stimulation is a new technique  [#permalink]

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New post 07 Oct 2018, 06:00
Deep-brain stimulation is a new technique for combating severe depression. In a recent experiment, electrodes were implanted into the brains of six patients who had not responded to any currently approved treatment for depression. When an electrical current to the electrodes was switched on, four of the patients reported feeling a dramatic reduction in depressive symptoms. The long-term prospects of the new treatment are not promising, however, because_________________.

(A) other treatments for depression may also be effective - Incorrect - this does not explain as to WHY Deep-brain stimulation is not promising on the long-term

(B) the other two patients reported only a slight reduction of depressive symptoms during the treatment - Incorrect - So Deep-brain stimulation has a good success ratio but it does not answer what happens afterward

(C) deep-brain stimulation relies on the expertise of highly skilled physicians - Incorrect

(D) when the electrical current is interrupted, the effects of the treatment are reversed - Correct - so the effects are temporary

(E) in a subsequent experiment, a one-hour treatment with the electrodes resulted in a sustained remission from depression in the four patients for six months - Incorrect - so this is the opposite of what we want

Answer D

The logic is similar to official questions in the below link -

https://gmatclub.com/forum/according-to ... 76592.html
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New post 08 Oct 2018, 03:38
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D - if the effects are reversed, there cannot be sustained positive effect.
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New post 09 Oct 2018, 02:43
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To correctly hit the answer we must know terminology like "sustained remission". So reading journals of all types could be quite beneficial.
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Re: Deep-brain stimulation is a new technique   [#permalink] 09 Oct 2018, 02:43
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