Researchers have discovered that a «reorganisation» of the wiring of the brain is the underlying cause
of phantom limb pain, which occurs in the vast majority of individuals who have had limbs amputated, and a potential method of treating it which uses artificial intelligence techniques.
A popular theory of the cause
of phantom limb pain is faulty «wiring» of the sensorimotor cortex, the part of the brain that is responsible for processing sensory inputs and executing movements.
«New insights into cause
of phantom limb pain may have therapeutic benefits.»
The exact cause
of phantom limb pain and other phantom sensations is yet unknown.
Not exact matches
The question remaining unaddressed is whether cutting off other possibilities
of romance and sexual attraction while there's still some dim chance
of attaining them in favor
of the more muted pleasures
of «mature love» isn't similar to voluntarily amputating a healthy
limb: a lot
of anesthesia is required and the
phantom pain never entirely abates.
The method is based on a unique combination
of several technologies, and has been initially tested on a patient who has suffered from severe
phantom limb pain for 48 years.
He is best known for the work that overlaps with my own interests: using mirrors as a low - tech form
of virtual reality to treat
phantom -
limb pain and stroke paralysis.
In a new study, researchers based at Osaka University reported on their use
of brain - machine interface (BMI) training with a robotic hand on 10
phantom limb patients to investigate the association between changes in symptomatic
pain and cortical currents during
phantom hand movements.
This approach has been tested on over a dozen
of amputees with chronic
phantom limb pain who found no relief by other clinically available methods before.
«The control group will be treated with one
of the current treatment methods for
phantom limb pain.
«Even though the hand is gone, people with
phantom limb pain still feel like there's a hand there — it basically feels painful, like a burning or hypersensitive type
of pain, and conventional painkillers are ineffective in treating it,» said study co-author Dr Ben Seymour, a neuroscientist based in Cambridge's Department
of Engineering.
Between 50 and 80 percent
of these patients suffer with chronic
pain in the «
phantom» hand, known as
phantom limb pain.
Researchers have long known that simply viewing an image
of an amputee's intact foot or arm in a mirror can sometimes help relieve
phantom pain, as if the brain's sense
of self adjusts its conflicting sensations about the missing
limb.
In addition to improved motor control, sensory stimulation could alleviate
phantom limb pain, which affects ~ 80 %
of amputees (2).
They can also feel excruciating
pain in specific parts
of the
phantom limb
Although the journal devoted considerable attention to
pain in amputees» stumps, there was very little discussion
of the
pain they felt in their missing
limbs, despite this phenomenon — known as
phantom limb pain — having been identified at least 50 years earlier.
According to the researchers,
phantom limb pain was marginalised in medical discussions
of the war, possibly because surgeons were helpless to do anything about it.
«We can be pretty certain that
phantom limb pain would have been a common problem among the many amputees who survived the war, but at least in this archive, there was curiously little discussion
of it or about its management.
He bore shrapnel wounds from World War II that probably shortened his life and she recalls him telling her about soldiers suffering from
phantom limb pain, which he equated with the experience
of sculpture: it's as real as it can be, but also elusive, residing in the imagination.