Tag Archives: imaging

Brain Imaging as a ‘Lie Detector’ for Chronic Pain

New Guidelines Discourage Use of Brain Imaging as a ‘Lie Detector’ for Chronic Pain Sep-2017

A task force consisting of researchers from around the world and led by a scientist at the Krembil Research Institute in Toronto has released a set of recommendations that advise against the use of brain imaging as a test for chronic pain.  

“It’s not possible at this point in time to say with any degree of certainty that a person does or does not have chronic pain based on brain imaging,” said Dr. Karen Davis, Head, Division of Brain, Imaging and Behaviour-Systems Neuroscience at the Krembil Research Institute at UHN . 

“The only way to truly know if someone is in pain is if they tell you because pain is subjective and it is a complex experience. No brain scan can do that.” Continue reading

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Gadolinium for Scans Builds Up Even in Normal Brains

Gadolinium Builds Even in Normal Brains | Medpage Today – by Kristina Fiore Kristina Fiore, Deputy Managing Editor, MedPage Today June 29, 2017

Gadolinium from imaging contrast agents sticks to neural tissues even in patients who don’t have intracranial abnormalities, according to a small, single-center, retrospective study.

In a postmortem study comparing tissues from the brains of five patients who had several magnetic resonance imaging (MRI) scans using gadolinium with 10 patients who had MRIs without contrast, elemental gadolinium was detected in four neuroanatomic regions of all five patients, with concentrations ranging from 0.1 to 19.4 mcg per gram of tissue,

Robert McDonald, MD, PhD, of the Mayo Clinic in Rochester, Minn., and colleagues reported online in Radiology.   Continue reading

Neuroscience Conference: Imaging of Pain

Neuroscience Conference: Imaging of Pain by Stephani Sutherland on 13 Feb 2017

Machine learning finds brain activity differs in low and high pain states during chronic low back pain

In an early step toward finding a brain imaging biomarker for pain, researchers have detected brain activity patterns in individual patients with chronic low back pain (cLBP) that differ depending on the pain level that the patients experience.

The team from Massachusetts General Hospital, Boston, US, used machine learning algorithms to analyze brain imaging data captured with arterial spin labeling (ASL).  Continue reading

Brain imaging of pain: state of the art

Brain imaging of pain: state of the art – J Pain Res. 2016 Sep – free full-text PMC article

Advances made in neuroimaging have bridged the gap between brain activity and the subjective experience of pain and allowed us to better understand the changes in the brain that are associated with both acute and chronic pain.

Additionally, cognitive influences on pain such as attention, anticipation, and fear can now be directly observed, allowing for the interpretation of the neural basis of the psychological modulation of pain.

The use of functional brain imaging to measure changes in endogenous neurochemistry has increased our understanding of how states of increased resilience and vulnerability to pain are maintained.   Continue reading

Why Fibromyalgia Patients Can’t Regulate Their Pain

Why Fibromyalgia Patients Can’t Regulate Their Pain | University of Michigan

By triggering its opioid receptors, the brain is naturally hardwired to shut down or dampen physical discomfort.

But for those with pain from chronic conditions such as fibromyalgia, a continued reliance on that process can be overtaxing — and ultimately ineffective.

“It’s sort of like trying to run a marathon … for months and years,” says Daniel Harper, Ph.D.

This is an apt description of pain. A sensation easily tolerated for a few moments can become excruciating over months and years.   Continue reading

Neuroimaging in Chronic Pain Management

Neuroimaging: Applications in Chronic Pain Management – Helen Fosam, PhD – August 30, 2016

Pain is a complex emotion with a wide spectrum of sensations spanning from extreme acute physical pain to emotional psychological pain.

Any person suffering from pain feels it as a sensation, not an emotion, so this sentence already betrays unreasonable assumptions or prejudice.

Perhaps researchers are confused on this issue because they’ve been brainwashed to believe our pain is “in our heads” like any other emotion.

Several factors contribute to the challenges of optimal pain management, including poor understanding of pain pathology, and the adoption of a ‘one size fits all’ treatment strategy.  Continue reading

Neuroscience in court: The painful truth

Neuroscience in court: The painful truth |25 February 2015 |  by Sara Reardon

In 2011, Annie, whose name has been changed at the request of her lawyer, slipped and fell on a wet floor in a restaurant, injuring her back and head. The pain has never eased, and forced her to leave her job in retail.

Annie sued the restaurant, which has denied liability, for several hundred thousand dollars to cover medical bills and lost income. To bolster her case that she is in pain and not just malingering, Annie’s lawyer suggested that she enlist the services of Millennium Magnetic Technologies (MMT).

MMT says that it can detect pain’s signature using functional magnetic resonance imaging (fMRI), which measures and maps blood flow in the brain as a proxy for neural activity.   Continue reading

Imaging the Brain in Pain

Imaging the Brain in Pain –  2016 – By Stephani Sutherland

Why do neuroscientists, including pain researchers, use brain imaging?

At the most fundamental level, neuroscientists use brain imaging as a tool to understand how the brain is organized and how it functions, and as basic science researchers, we want to understand its fundamental processes.

In the past, most of the great developments in science and medicine have come from that kind of unrestricted exploration, as opposed to directly trying to develop a treatment.   Continue reading

The Battle over Pain in the Brain

The Battle over Pain in the Brain – Scientific American – By Diana Kwon on April 28, 2016

Despite recent advances in uncovering the underlying mechanisms of pain perception in the brain, scientists are still debating the questions of where and how pain is processed.

Over the years neuroscientists have identified the “pain matrix,” a set of brain areas including the anterior cingulate cortex, thalamus and insula that consistently respond to painful stimuli.

Some researchers have since applied this concept to conclude that that rejection hurts because social pain and physical pain share similar mechanisms in the brain.   Continue reading