Tag Archives: Brain Science

How about those Glial Cells

For many years neurons have been considered the main act within the cerebral cortex, responsible for our thoughts, emotions, and movements. Of interest is the fact that neurons only account for about 10% of human brain cells. Glial cells that account for the other 90% of brain cells have typically been thought to carry a supportive role to the neurons.

An article in Forbes Magazine (July 13, 2009), however, suggests glial cells may be even  more important than neurons for treating neurodegenerative diseases such as Alzheimer’s, Parkinson’s, and stroke. Recent understanding of the brain now indicates glial cells with neurons play a critical role in brain development and brain function.

Medications on the market today do not work on glial cells. Ben Barnes, Chairman of the Neurobiology Department at Stanford University Medical School posits that one type of glial cells, the astrocytes, trigger the initial steps of destruction in brain diseases. As such, Dr. Barnes believes that by creating treatments that of the astrocytes can in turn save dying neurons.

If glial cells do indeed maintain a more critical role in the formation, function, and elimination of synaptic activity, plasticity, and creation of myelin sheath around the neuron, an entirely new approach to behavioral neuroscience will be born and with it, an entirely new treatment approach.

Please Speak into my Dominant Ear

ear

The human brain has what is known as a dominant side and a non-dominant side. Dominance is determined by where language is processed and for the vast majority of humans we believe the dominant side is the left side or left hemisphere. Interestingly, we are not sure why the left side evolved to be dominant, but perhaps it had something to do with cave men and women using their right hands more often.

As language is processed primarily by most in the left hemisphere it is important to note that words are best processed when spoken into the right ear. The right ear processes information primarily using the left hemisphere while the left ear uses the right hemisphere.

A recent study found that words were more deeply processed when spoken into the person’s right ear. Therefore, if you want me to remember something for you please speak to me on my right side.

The 5 Major Brain Areas: Memory

The human brain is very complex and responsible for all behavior, and we are continually learning new information about how it operates. Behavioral and cognitive functions can be organized into five distinct domains to include : Memory,  Attention & Concentration, Language Skills, Visual & Spatial and Executive Functions (Logic & Reasoning).

Memory

Memory and new learning is a necessary and important function of the human brain. Our ability to live independently and to function normally is a direct result of a normal memory system. Our life story is built by encoding and retaining our daily experiences. Our personal identity is framed by our memory and ability to learn from these memories.

Memory and new learning begins with the Hippocampus, a critical structure in the middle temporal lobes of both hemispheres of the brain. This is the structure that enables learning and transition of new learning into a permanent storage site in the Cortex. The Hippocampus has the ability to generate new brain cells with stimulating environments, can be damaged with chronic stress, and is hit early by Alzheimer’s disease. Damage to the Hippocampus results in memory deficits.
Read more about Memory…

Implications of Poverty on the Brain

Most advanced nations spend a significant amount of time, money, and energy dealing with poverty and the short and long term consequences for those who live in poverty. Policy statements are drafted and then implemented with varying degrees of success. One thing is certain, no policy has removed poverty suggesting that we either have not implemented the correct policy or poverty is a reality of life.

One aspect of poverty that probably does not receive enough attention is the negative health outcomes that result from such an environment. Studies many years ago demonstrated the negative effects of an un-enriched environment on rats. Interestingly, the brain was significantly affected both structurally and functionally. For humans, poverty really represents an unenriched environment in which poor nutrition, lack of love and attention, crime, drugs, insecurity, and lack of proper mental stimulation exist.

A nation enlightened to development of our youth and to creation of a policy that understands the impact of poverty will confront this reality. Research has demonstrated a correlation between poverty in childhood and increased risk for Alzheimer’s disease later in life. While there are short term consequences of poverty, there are also long term effects particularly when one understands that poverty limits proper development of the human brain.

Perhaps a first step in creating a policy on poverty is to educate the public on the importance of environmental input early in life upon later development of the human brain. Most families will work to follow such educational guidelines if they understand what to do with regard to promoting brain health for their own children. For those who are vulnerable and without resources or adults to provide the enriched environment policies can address what is needed and appropriate resources to help developing children thrive.

More Americans taking drugs for Mental Illness

Significantly more Americans are taking prescription drugs for mental illness since 1996 according to a new study. Researchers believe the increase is due in part to expanded insurance coverage and a greater familiarity with the drugs among primary care doctors.

The findings indicate 73% more adults and 50% more children are using drugs to treat mental illness than in 1986. Among those over the age of 65, use of psychotropic medication has doubled between 1996 and 2006. Similarly, children diagnosed and treated for mental health conditions by their primary care physician have doubled between 1996 and 2006.

Mental health has become more of a mainstream issue within overall health and access to such care has improved. One problem the researches underscore is the lack of access to mental health services by the severely mentally ill. Lack of treatment can lead to these individuals ending up in the criminal justice system according to the researchers.

While the researchers point out that access to mental health services has increased significantly and that this is a positive outcome, it is also reasonable to question if something else besides access accounts for increased utilization of psychotropic medication. In particular, why are so many children being treated for mental health problems and being treated with medication?

It is important for the United States and all nations to provide appropriate diagnostic and treatment interventions. This includes medication and non-medication treatments and certainly a greater reliance on proactive rather than reactive approaches to care.