Many homeless men have suffered a traumatic brain injury in their life, according to a recent study conducted by researchers at St. Michael’s Hospital.
After collecting data from over 100 men aged 27 to 81 from a shelter in downtown Toronto, researchers found that nearly half of the homeless men surveyed had suffered a traumatic brain injury. Of those who had suffered a traumatic brain injury, 87 percent experienced the injury prior to becoming homeless.
According to new research, positron emission tomography (PET), a functional brain imaging technique, is a promising tool for determining which brain damaged individuals in vegetative states have the potential to recover consciousness. This is the first time researchers have tested the accuracy of functional brain imaging for diagnosis in clinical practice.
The researchers from the University of Liége in Belgium suggest that PET imaging can reveal cognitive processes that would otherwise be hidden to traditional testing. Using imaging in addition to standard behavioral assessments could improve patients with the potential for long-term recovery.
I think I’m funny. Some people say I’m funny. But when the moment presents itself where its my time to shine, all lights on me, this ‘one’ is going to be a knee slapper…nope, not so much. The first time I realized I wasn’t funny was in the eleventh grade in my calculus class. My teacher’s name was Mr. Butke and he easily is ranked in my top 3 ‘all-time’ of the math professors I’ve encountered in my lifetime. He had a mustache that covered his mouth and you never knew whether he was smiling, smirking, or grimacing at you. It kept you guessing, I liked that. He also presented stories of how he slayed cobras in Kenyan villages while pursuing a multi-purpose cure for malaria, encephalitis’ of sorts, and maybe AIDS. Bottom line, he was memorable and his stage presence resonated with my classmates and I.
Numbers. Those arithmetical values that allow us to analyze and measure our surroundings. Without them, our understanding of the world we live in would be far less interesting. But what may be even more interesting is the way we process those numbers and how closely related that process is to spatial reasoning. The connection between space and numbers, specifically how we materialize values in our heads through mental number lines has been studied over the years, revealing that spatial orientation is incredibly important to this hypothetical number line. One study led by cognitive neuroscientist Stanislas Dehaene investigated how number magnitude is spatially organized in our minds and introduced the phenomenon of Spatial-Numerical Association of Response Codes, or the SNARC effect for short.
For years, the brain of a child with autism has been a mystery. Doctors and parents wondered about the cause of autism, and it seemed that they would never get those answers. Autism is characterized on a spectrum with various expressions of difficulty with social interaction including difficulty with verbal and nonverbal communication. Children with ASD (Autism Spectrum Disorder, the official title of ‘autism’ after the May 2013 publication of the DSM-5) are associated with difficulties with motor coordination, attention, intellectual disabilities, and physical health problems like sleep and gastrointestinal problems. Autism is usually presented by age three and the process of diagnosing autism continues to change, according to the Autism Speaks foundation.
Dr. Thomas R. Insel, director of NIMH at the NIH says that “while autism is generally considered a developmental brain disorder, research has not identified a consistent or causative lesion.” The newest reports show that the architecture of the autistic brain is “speckled with patches of abnormal neurons.” In the study published in the New England Journal of Medicine, there is evidence that the brain irregularities of children with autism are due to abnormal prenatal development.
For years doctors have been able to detect the early symptoms of Alzheimer’s disease through scans, lumbar punctures, and genetic testing. While these methods can be painful or expensive, a new blood test has recently been discovered that can easily and accurately predict the onset of Alzheimer’s disease.
Doctor Howard J. Federoff of Georgetown University Medical Center conducted a research study in which he took blood samples from hundreds of healthy, elderly men and women over the age of 70. Over the next five years, some of these healthy individuals developed Mild Cognitive Impairment or Alzheimer’s Disease. Federoff then compared their blood samples to the samples of the healthy individuals. He found a group of ten lipids, or fats, that were present in lower amounts in the blood samples of the participants who had developed Alzheimer’s Disease.
We all know that sleep is one of the best ways to restore our body. For example, when we become sick, we just lie in bed and sleep all day; or after a long day bustling between class, the gym, meetings, and extracurricular activities, our body yearns to fall into a deep slumber to restore itself to its peak state. Recently, it was published that the reason sleep is so restorative is because while we sleep, cerebrospinal fluid flows more efficiently through the brain, essentially “clearing” the brain of any metabolic waste products that build up during the day (for more on this, refer to the December 9th blog post). However, just as we all understand that great feeling of satisfaction that comes after the so rarely obtained 8-9 hour sleep cycle (yes, young college-aged adults should ideally be getting 8-9 hours of sleep a night), we also can all relate to the groggy, confused, cognitively impaired state that comes after the all-night cramming and three hours of sleep, and before the double espresso from Starbucks. Until recently, this chronic state of unrest considered normal by college students, shift workers, and truck drivers, wasn’t thought to have any long lasting damage; it was considered common knowledge that catching up on sleep during weekends or vacations made up for the hours of sleep lost during finals week. However, a new study published on March 18th in the Journal of Neuroscience refutes this; the study, out of University of Pennsylvania’s Perelman School of Medicine, shows that chronic sleep loss may be much more destructive than previously thought, leading to permanent cell damage and neuronal death.
How many times have you not completed the reading assignment for you systems physiology class because you ran out of time? How many times have you attempted to use speed reading techniques like not subvocalizing, or talking to yourself as you read? A new Boston-based start-up claims to have solved the ‘slow reader’ problem and promises 600 words per minute for all.
One must be skeptical when approaching the front line technologies, as it is easy to be convinced that people have invented what you desire. For instance, when Tony Hawk promotes a brand “hoverboard” technology, Back to the Future fans went berserk. However, Spritz is a bit more open about the actual science behind their product.
Brain Signals from One Primate Move Paralyzed Limbs in Another Primate
Researchers from Cornell’s School of Electrical and Computer Engineering and Harvard Medical School’s Department of Neurosurgery have developed a new neural prosthetic that uses neural activity recorded from premotor neurons to control limb movements in functionally paralyzed primates. This is a step toward making brain-machine interfaces for paralyzed humans to control their own limbs using just their brain activity. Previous research has been limited to controlling external devices such as robotic limbs.
Ever wonder why children can learn certain things, such as languages, faster than adults? There is a time in every human’s life called the critical period, and it takes place during the most intense period of development, childhood. During this time a child’s brain has high neuroplasticity, almost like a sponge. Many new pathways are formed as the child experiences new things. It has always been believed that when our critical period ends it never comes back but recent study has been done with the drug Valproate that increased neural plasticity in adults and may have reopened this critical period.
Valproate is a drug most commonly used for bipolar disorder and epilepsy. It is also known to inhibit an enzyme called histone- deacetylase, or HDAC. HDAC is an enzyme in the brain that slows down neural plasticity. Inhibition of this enzyme by Valproate allows the reopening of pathways in the brain, increasing neuroplasticity, thus reopening the critical period.