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Sex cells evolved to pass on quality mitochondria. One of a series of ova made in a spell of reproductive mitochondrial interest.

Sex cells evolved to pass on quality mitochondria

The ovum about to ovulate has differentiated from the rest of the surrounding tissue and is getting ready to leave the ovary. Its mitochondria are organized mainly around the nucleus. The cell is full of potential and force. A big journey of life may be about to start. Credit: Odra Noel Mammals immortalise their genes through eggs and sperm to ensure future generations inherit good quality mitochondria to power the body’s cells, according to new UCL research.

Before now, it was not known why mammals rely on dedicated sex cells that are formed early in development (a germline) to make offspring whereas plants and other simple animals, such as corals and sponges, use sex cells produced later in life from normal body tissues. A new brain mapping technique reveals circuitry of Parkinson’s disease tremors. Image Credit: Flickr/amy leonard.

A new brain mapping technique reveals circuitry of Parkinson’s disease tremors

Deep Brain Stimulation off vs on. DBS electrically stimulates the brain to reduce effects of diseases such as depression and Par. The Cure For Fear. Klaver found it difficult to talk about her anxiety, even with her husband.

The Cure For Fear

Thinking back to the robbery left her feeling even more isolated and vulnerable. A comprehensive review of psychodynamic treatments for eating disorders. 2.

A comprehensive review of psychodynamic treatments for eating disorders

Treasure J, Claudino AM, Zucker N (2010) Eating disorders. Lancet 375:583–593. doi:10.1016/S0140-6736(09)61748-7. An Unpredictable Chronic Mild Stress Protocol for Instigating Depressive Symptoms, Behavioral Changes and Negative Health Outcomes in Rodents.

Disorders

NeuroPsychology. Sleep. Drugs. PsychTests. Violent video games reduce brain response to violence, aggressive behavior. Scientists have known for years that playing violent video games causes players to become more aggressive.

Violent video games reduce brain response to violence, aggressive behavior

The findings of a new University of Missouri (MU) study provide one explanation for why this occurs: the brains of violent video game players become less responsive to violence, and this diminished brain response predicts an increase in aggression. "Many researchers have believed that becoming desensitized to violence leads to increased human aggression. Until our study, however, this causal association had never been demonstrated experimentally," said Bruce Bartholow, associate professor of psychology in the MU College of Arts and Science. During the study, 70 young adult participants were randomly assigned to play either a nonviolent or a violent video game for 25 minutes. Johns Hopkins Neurology and Neurosurgery.

The Prevalence Of Personality Disorders In The United States. An estimated 30.8 million American adults (14.8 percent) meet standard diagnostic criteria for at least one personality disorder as defined in the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders—Fourth Edition (DSM-IV), according to the results of the 2001-2002 National Epidemiologic Survey on Alcohol and Related Conditions (NESARC) reported in the current issue of the Journal of Clinical Psychiatry [Volume 65:948-958].

The Prevalence Of Personality Disorders In The United States

Conducted by the National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, the NESARC is a representative survey of the U.S. civilian noninstitutionalized population aged 18 years and older. More than 43,000 American adults participated in the survey. The researchers found that risk of having avoidant, dependent, and paranoid personality disorders is greater for females than males, whereas risk of having antisocial personality disorder is greater for males than females. Researchers reformulate the model of mitochondrial function. The discovery confirms the model proposed by the team in 2008 to account for observations that could not be explained by the established model of mitochondrial function.

Researchers reformulate the model of mitochondrial function

Mitochondria are the organelles in the interior of cells that, among other functions, extract energy from nutrients and convert it into a form that can be used by the cell for its vital processes. The consumption, digestion and assimilation of nutrients serves the ultimate purpose of fueling each and every cell in the body. The breakdown of nutrients in the digestive tract requires energy to release simple compounds from larger components: glucose from sugars and carbohydrates, amino acids from proteins, and fatty acids from fat. Deep Brain Stimulation. What are the Facts?

Deep Brain Stimulation

Deep brain stimulation (DBS) is a surgical procedure used to treat a variety of disabling neurological symptoms—most commonly the debilitating symptoms of Parkinson’s disease (PD), such as tremor, rigidity, stiffness, slowed movement, and walking problems. The procedure is also used to treat essential tremor, a common neurological movement disorder. DBS does not damage healthy brain tissue by destroying nerve cells. Instead the procedure blocks electrical signals from targeted areas in the brain. Hormones Stress and the Brain. Stress Cortisol Connection. Fortunately, fitness professional are already doing many physical activities to help their clients manage stress.

Stress Cortisol Connection

Many types of aerobic and anaerobic exercise have been shown to be effective interventions in reducing or managing stress. Some of the popular ‘mindful’ exercise programs such as yoga and Tai Chi (or Tai Chi Chaun) are also recommended for stress management. Meditation, progressive relaxation, deep breathing, and visualization are methods that can be effective in decreasing stress-induced symptoms. Also, eating right and getting enough rest should be incorporated in a stress management plan for life. Stress acts cumulatively to precipitate Alzheimer... [J Neurosci. 2011. Brain structure adaptation to stress TINS 2012.

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