Showing posts with label Alzheimer News. Show all posts
Showing posts with label Alzheimer News. Show all posts
Friday, December 10, 2010
Resources
Perhaps because I'm in the field, but I get several good resources about different kinds of dementia, their treatment and the research being done. One is John Hopkins newsletter; another is Alzheimer and Dementia Weekly. If anyone wants contact information, write me @ beverly.moore@stilmee.com.
Monday, December 6, 2010
FTL Dementia update from Dementia Weekly
Frontotemporal dementias are a set of devastating, progressive diseases. They attack the parts of the brain responsible for judgment, empathy, and social behavior. People with FTD often develop personality changes, make ruinous financial decisions, become sexually inappropriate, or engage in compulsive behavior. Some patients with AD exhibit some of those behaviors, too; however, with FTDs they are front and center. Some forms of FTD rob people of normal speech, while others impair movement, similar to Parkinson’s disease and amyotrophic lateral sclerosis. FTD typically strikes at younger ages than does AD, often in a person’s late forties or fifties. It involves less memory loss than AD, but much worse behavior problems. Patients, in early stages of FTD, often seem indifferent to what would be a mortifying situation for a healthy person.
The disease is particularly devastating to families, said Susan Dickinson, who heads the Association for Frontotemporal Dementias, because it often goes unrecognized or misdiagnosed. Families, therefore, have no recourse if a spouse with FTD blows all his or her money on a sports car, or makes advances to a neighbor, since the spouse is not recognized as ill. Friends may withdraw because of the rude or disturbing behavior of the person with FTD. “Living with these diseases is incredibly isolating,” Dickinson said. “These families are losing their loved ones, and nobody will listen. We have a lot of people who get divorced.” Earlier diagnosis of the disease would help families to understand and cope with what is happening, Dickinson said. “As soon as there is a medical diagnosis, a lot of people get right back together to care for their spouse.”
FTDs are fairly rare. Scientists estimate as many as 20,000 Americans suffer from them, said David Knopman of the Mayo Clinic in Rochester, Minnesota, reviewing the findings of several recent papers. This is similar to the number of Americans with amyotrophic lateral sclerosis, but about 200-fold less than people with Alzheimer’s disease. FTD most often hits between 45 and 64 years old, and people typically survive six to nine years after diagnosis, Knopman said, similar to Alzheimer’s.
Frontotemporal dementia is an umbrella term that encompasses a large number of clinical syndromes and distinct pathologies. This includes a confusing lexicon of terms such as progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), primary progressive aphasia (PPA), behavioral variant FTD (bvFTD), and Pick’s disease. The distinctions among these syndromes are often hazy, and diagnosis can only be reliably made after death by examining brain tissue changes. Until quite recently, the fundamental biology at the root of many of these syndromes was a mystery.
The disease is particularly devastating to families, said Susan Dickinson, who heads the Association for Frontotemporal Dementias, because it often goes unrecognized or misdiagnosed. Families, therefore, have no recourse if a spouse with FTD blows all his or her money on a sports car, or makes advances to a neighbor, since the spouse is not recognized as ill. Friends may withdraw because of the rude or disturbing behavior of the person with FTD. “Living with these diseases is incredibly isolating,” Dickinson said. “These families are losing their loved ones, and nobody will listen. We have a lot of people who get divorced.” Earlier diagnosis of the disease would help families to understand and cope with what is happening, Dickinson said. “As soon as there is a medical diagnosis, a lot of people get right back together to care for their spouse.”
FTDs are fairly rare. Scientists estimate as many as 20,000 Americans suffer from them, said David Knopman of the Mayo Clinic in Rochester, Minnesota, reviewing the findings of several recent papers. This is similar to the number of Americans with amyotrophic lateral sclerosis, but about 200-fold less than people with Alzheimer’s disease. FTD most often hits between 45 and 64 years old, and people typically survive six to nine years after diagnosis, Knopman said, similar to Alzheimer’s.
Frontotemporal dementia is an umbrella term that encompasses a large number of clinical syndromes and distinct pathologies. This includes a confusing lexicon of terms such as progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), primary progressive aphasia (PPA), behavioral variant FTD (bvFTD), and Pick’s disease. The distinctions among these syndromes are often hazy, and diagnosis can only be reliably made after death by examining brain tissue changes. Until quite recently, the fundamental biology at the root of many of these syndromes was a mystery.
Tuesday, October 5, 2010
White Matter Matters a Lot
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White Matter Matters A Lot
When it comes to your brain, you probably have read all about the brain's "gray matter." Gray matter, so called because of its distinctive color, is composed of cell bodies of nerve cells and is responsible for memory storage. "White matter" also is in the brain and consists of millions of long filaments (axons) coated with a fatty white substance called myelin that extend from the cell bodies. This white matter fills half of the brain and helps transmit electrical signals that carry the important messages between neurons from one brain region to the other.
White matter has long been a mystery to neuroscientists as well as to the surgeons who operated on the brain. The main thought was that myelin -- which looks like an outstretched, elongated finger when viewed under a microscope -- was simply insulation and that the filaments inside were passive passageways. Only in the past decade have researchers begun to better understand the critical role of white matter in helping a person master a variety of mental skills.
Johns Hopkins scientists have discovered to their surprise that nerves in the mammalian brain's white matter do more than just ferry information between different brain regions. In fact, they process information the way gray matter cells do, and assist brain regions to work well together. The discovery in mouse cells, reported in a cover story in the journal Nature Neuroscience, shows that brain cells "talk" with each other in more ways than previously thought.
Researchers in Europe have also noted that the maturing of the brain from childhood to adulthood, and experience at an early age (learning a foreign language, how to play a sport, ride a bike, play an instrument) influences the formation of myelin, strengthens neuronal connections, speeds the learning process, and improves cognition. Damage to the myelin, on the other hand, can impair mental abilities.
Damage to the brain's white matter has also been found to be an indicator of potential memory problems and dementia. Dutch researcher Niels Prins, M.D., has discovered that elderly people with damage to the small blood vessels in the brain have a greater chance of developing dementia or depression.
Elderly people with serious white matter abnormalities and infarcts taking part in Dr. Prins's study were found to deteriorate more quickly in their cognitive functioning than peers with fewer abnormalities. In particular, the processing of information was worse in the group with more white matter lesions and infarcts. This group also had an increased risk of developing dementia and depression.
Over a period of three years, one-third of the elderly people he investigated exhibited an increase in white matter lesions. These individuals had an increased likelihood of experiencing a stroke and a faster decline in their cognitive functioning. Furthermore, a significant increase in the number of abnormalities in the white matter increased the risk of dementia and depression.
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White Matter Matters A Lot
When it comes to your brain, you probably have read all about the brain's "gray matter." Gray matter, so called because of its distinctive color, is composed of cell bodies of nerve cells and is responsible for memory storage. "White matter" also is in the brain and consists of millions of long filaments (axons) coated with a fatty white substance called myelin that extend from the cell bodies. This white matter fills half of the brain and helps transmit electrical signals that carry the important messages between neurons from one brain region to the other.
White matter has long been a mystery to neuroscientists as well as to the surgeons who operated on the brain. The main thought was that myelin -- which looks like an outstretched, elongated finger when viewed under a microscope -- was simply insulation and that the filaments inside were passive passageways. Only in the past decade have researchers begun to better understand the critical role of white matter in helping a person master a variety of mental skills.
Johns Hopkins scientists have discovered to their surprise that nerves in the mammalian brain's white matter do more than just ferry information between different brain regions. In fact, they process information the way gray matter cells do, and assist brain regions to work well together. The discovery in mouse cells, reported in a cover story in the journal Nature Neuroscience, shows that brain cells "talk" with each other in more ways than previously thought.
Researchers in Europe have also noted that the maturing of the brain from childhood to adulthood, and experience at an early age (learning a foreign language, how to play a sport, ride a bike, play an instrument) influences the formation of myelin, strengthens neuronal connections, speeds the learning process, and improves cognition. Damage to the myelin, on the other hand, can impair mental abilities.
Damage to the brain's white matter has also been found to be an indicator of potential memory problems and dementia. Dutch researcher Niels Prins, M.D., has discovered that elderly people with damage to the small blood vessels in the brain have a greater chance of developing dementia or depression.
Elderly people with serious white matter abnormalities and infarcts taking part in Dr. Prins's study were found to deteriorate more quickly in their cognitive functioning than peers with fewer abnormalities. In particular, the processing of information was worse in the group with more white matter lesions and infarcts. This group also had an increased risk of developing dementia and depression.
Over a period of three years, one-third of the elderly people he investigated exhibited an increase in white matter lesions. These individuals had an increased likelihood of experiencing a stroke and a faster decline in their cognitive functioning. Furthermore, a significant increase in the number of abnormalities in the white matter increased the risk of dementia and depression.
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