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# Deep-brain stimulation is a new technique

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Manager
Joined: 21 May 2015
Posts: 215
Concentration: Operations, Strategy
GMAT 1: 750 Q50 V41
Deep-brain stimulation is a new technique  [#permalink]

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Updated on: 07 Oct 2018, 05:52
1
7
00:00

Difficulty:

25% (medium)

Question Stats:

72% (01:20) correct 28% (01:38) wrong based on 483 sessions

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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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Apoorv

I realize that i cannot change the world....But i can play a part

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.
formatted
Manager
Joined: 21 Aug 2014
Posts: 136
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Re: Deep-brain stimulation is a new technique  [#permalink]

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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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Joined: 30 May 2015
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Re: Deep-brain stimulation is a new technique  [#permalink]

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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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Joined: 03 Apr 2015
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Schools: ISB '16 (A)
Re: Deep-brain stimulation is a new technique  [#permalink]

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

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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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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

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

https://gmatclub.com/forum/according-to ... 76592.html
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Re: Deep-brain stimulation is a new technique  [#permalink]

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08 Oct 2018, 03:38
1
D - if the effects are reversed, there cannot be sustained positive effect.
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Joined: 31 May 2015
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Re: Deep-brain stimulation is a new technique  [#permalink]

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09 Oct 2018, 02:43
1
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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