Damage to the nervous system, such as stroke, may cause similar illusions in weakened limbs, whereby an arm or leg may feel as if it is in a completely different position or may even feel as if it is moving when it is not.
Cases of phantom limbs in non-amputees have previously been considered rare events, but a new study published in the October 2010 issue of Elsevier's Cortex reports that more than half of patients recovering from stroke may in fact experience phantom limb sensations.
Dr Daniel Antoniello from the Albert Einstein College of Medicine, New York, together with colleagues from the Universities of Colorado and Florida, and New York University, interviewed 50 post-stroke patients, with the aim of establishing how common phantom limbs were and also determining the characteristics of such experiences. They found 27 of the interviewees to have experienced phantom limb sensations, many on a daily basis; they would move to adjust their position in bed, only to discover that their arm was underneath them, instead of beside them; others would feel their toes or fingers wiggling, even though they were not; some were even able to control their phantom limb, e.g., extending the arm to scratch an itch, which would of course not relieve the itch.
Dr Antoniello suggests that a possible reason for the phenomenon being underreported is that "patients fear being labeled 'crazy' and are less likely to report these sensations than other symptoms." A detailed exploration of body image has also not been part of the standard clinical assessment of stroke patients.
"The study sheds light on how the phenomenal experience of one's body can be altered after neurological damage," explains Dr Antoniello. "Remarkably, some of these individuals are able to control their phantom limbs with near total volition. This report has identified a group of patients that provide a valuable opportunity to explore how the brain constructs the conscious perception of the body."
Notes to Editors:
The article is "Phantom limb after stroke: An underreported phenomenon" by Daniel Antoniello, Benzi M. Kluger, Daniel H. Sahlein, and Kenneth M. Heilman, and appears in Cortex, Volume 46, Issue 9 (October 2010), published by Elsevier in Italy. Full text of the article featured above is available to members of the media upon request. Please contact the Elsevier press office, firstname.lastname@example.org. To schedule an interview, contact Dr Daniel Antoniello, email@example.com.
Cortex is an international journal devoted to the study of cognition and of the relationship between the nervous system and mental processes, particularly as these are reflected in the behaviour of patients with acquired brain lesions, normal volunteers, children with typical and atypical development, and in the activation of brain regions and systems as recorded by functional neuroimaging techniques. It was founded in 1964 by Ennio De Renzi. The Editor in-chief of Cortex is Sergio Della Sala, Professor of Human Cognitive Neuroscience at the University of Edinburgh. Fax: 0131 6513230, e-mail: firstname.lastname@example.org. Cortex is available online at http://www.sciencedirect.com/science/journal/00109452
Elsevier is a world-leading publisher of scientific, technical and medical information products and services. The company works in partnership with the global science and health communities to publish more than 2,000 journals, including the Lancet (www.thelancet.com) and Cell (www.cell.com), and close to 20,000 book titles, including major reference works from Mosby and Saunders. Elsevier's online solutions include ScienceDirect (www.sciencedirect.com), Scopus (www.scopus.com), Reaxys (www.reaxys.com), MD Consult (www.mdconsult.com) and Nursing Consult (www.nursingconsult.com), which enhance the productivity of science and health professionals, and the SciVal suite (www.scival.com) and MEDai's Pinpoint Review (www.medai.com), which help research and health care institutions deliver better outcomes more cost-effectively.
A global business headquartered in Amsterdam, Elsevier (www.elsevier.com) employs 7,000 people worldwide. The company is part of Reed Elsevier Group PLC (www.reedelsevier.com), a world-leading publisher and information provider. The ticker symbols are REN (Euronext Amsterdam), REL (London Stock Exchange), RUK and ENL (New York Stock Exchange).
Real-time feedback helps save energy and water
08.02.2017 | Otto-Friedrich-Universität Bamberg
The Great Unknown: Risk-Taking Behavior in Adolescents
19.01.2017 | Max-Planck-Institut für Bildungsforschung
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
24.02.2017 | Life Sciences
24.02.2017 | Life Sciences
24.02.2017 | Trade Fair News