Phantom limbs more common than previously thought

Sep 24, 2010

After the loss of a limb, most patients experience the feeling of a phantom limb - the vivid illusion that the amputated arm or leg is still present. 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 , 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 .

"The study sheds light on how the phenomenal experience of one's body can be altered after ," 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."

Explore further: Serotonin neuron subtypes: New insights could inform SIDS understanding, depression treatment

More information: Cortex is available online at www.sciencedirect.com/science/journal/00109452

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NoeticCenter
not rated yet Sep 25, 2010

Bio Dark-Matter and the Invisible Homo sapiens is viable and reasonable, perhaps even to explain "phantom limbs".
Recent Publications:
1. Dark Chemistry & Paranormal, WorldComp'10 Proceedings, International Conference on Artificial Intelligence, Vol II, 633, July '10, CSREA Press, Las Vegas, NV. Presented orally also on July 15. Philip Benjamin .

2. DARK CHEM & PARANORMAL PHENOMENA, Int. J. of Applied Science & Computations, Vol. 17, No. 1 p 16 to 36, June '10, Philip Benjamin 3. Dark Matter & Dark Chemistry, NeuroQuantology Sept '07, Vol 5 # 3, 322, Philip Benjamin

4. Dark Chemistry or Psychic Spin Pixel? NQ, June '07, Vol. 5 # 2, 197, Philip Benjamin

5. Mind Matter, Noetic J. '03, Vol 4 # 4, 351 [Nobelist Sir John Eccles Centennial Edition], Philip Benjamin

[Google for "Invisible Homo sapiens"; Dark Matter Biology; Dark Matter Chemistry; Spin Pixel?; Mind Matter, Extraordinary Materialism].

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