0
We're unable to sign you in at this time. Please try again in a few minutes.
Retry
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
Retry
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Correspondence |

The Consciousness Dilemma: Feel or Feel of Feeling?—Reply

Adrian M. Owen, PhD; Martin R. Coleman, PhD; Melanie Boly, MD; Matthew H. Davis, PhD; Steven Laureys, MD; John D. Pickard, MD
Arch Neurol. 2008;65(3):418-419. doi:10.1001/archneur.65.3.418-b.
Text Size: A A A
Published online

Extract

In reply

The main question raised by Sarà and colleagues is whether the activation that we observed in our patient when we asked her to perform mental imagery tasks in the functional magnetic resonance imaging scanner could have reflected an “implicit preconscious neural response.” For this to be a plausible alternative explanation, Sarà and colleagues would need to provide empirical evidence of the following: (1) the word tennis can produce a statistically significant change in activity in the supplementary motor cortex of a single individual who is not consciously aware; (2) the word house can produce a statistically significant change in activity in anatomically different regions of the brain, including the parietal lobe and the parahippocampal cortices, in the same unconscious individual; and (3) in both cases, these responses are sustained for up to 30 seconds and then stop when the (unconscious) participant is presented with another word (eg, rest). The article1 they cited in support of their argument provides no such evidence; indeed, that study demonstrates only that emotional words can produce changes in skin conductance in the absence of conscious awareness, which, although interesting in its own right, is not directly relevant to the anatomically specific, temporally sustained functional magnetic resonance imaging responses to specific (nonemotional) words that we observed in our patient who was diagnosed as vegetative. In fact, we know of no data supporting the inference that such stimuli do unconsciously elicit sustained hemodynamic responses in these regions of the brain, but considerable data exist to suggest that they would not (eg, in the study by Davis et al2).

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

First Page Preview

View Large
First page PDF preview

Figures

Tables

References

Correspondence

CME
Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.

Multimedia

Some tools below are only available to our subscribers or users with an online account.

18 Views
0 Citations
×

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.

Articles Related By Topic
Related Collections
PubMed Articles
Jobs
JAMAevidence.com

The Rational Clinical Examination: Evidence-Based Clinical Diagnosis
Quick Reference

The Rational Clinical Examination: Evidence-Based Clinical Diagnosis
Quick Reference

brightcove.createExperiences();