1. What Does Age-Related Structural Brain Changes Mean For Behavior In An Aging Adult?

Neurons, nerve cells, have three basic parts: the cell body, dendrites, and axon. Neurons transmit signals to other nerve cells and throughout the body. They are simple components in the nervous system. The cell body includes the nucleus, which is the control center of the neuron. The dendrite branches off the cell body and receives information. The axon is attached to the cell body and sends information away from the cell body to other cells. When the axon goes through myelination, the axon part of the neuron becomes covered and insulated with fat cells, myelin sheath. This increases the speed and efficiency of information processing in the nervous system. Synapse are gaps between neurons, this is where connections between the axons and dendrites.

The prefrontal cortex, which is the anterior part of the frontal lobes, controls understanding consequences, impulse control, abstract thinking, long range planning, and mental flexibility (Ortiz 93-94). Researchers at UCLA, Harvard Medical School, and the National Institute of Health have been working together to understand brain development. Their research has shown that at a young age the brain overproduces gray matter, which is the overall thinking part of the brain. After this comes the pruning process in which gray matter is removed. Paul Thompson from UCLA describes this time as a "massive loss of brain tissue" (as quoted in Ortiz 94). The average amount of tissue lost per year is one to two percent (Ortiz 94). While this pruning process is taking place the myelination is occurring simultaneously. Myelination is when white matter, what insulates the brain, makes brain process more efficient. This process is also thought to shape brains neural connections for adulthood (Ortiz 95). With age, the brain becomes denser and more organized which makes it better at processing and understanding information. Changes in the brain also can happen late into the twenty's (Beckman 3). A member of the UCLA research team reported that "[The] frontal lobe undergoes the most change during adolescence-by far. It is also the last part of the brain development" (as quoted in Ortiz 94). For most, full brain development is reached during the ages

Finally, adulthood consists of early adulthood, middle adulthood and late adulthood. Early adulthood is a stage where individuals are physically in their best condition. Memory and thinking abilities are sharp, life decisions are made, and they take on roles of independence. Middle adulthood is when individuals start to reflect on their lives as a whole. Retirement planning and sadness over unaccomplished goals began to surface, during this particular stage. Some physical changes such as hearing and vision start to take place. Focusing more on health, relationships and becoming tolerable with death are all signs of late adulthood development. The immune system, vision, hearing, and muscle strength start to decline. Loss of memory is a cognitive trait that is related

Evidence of significant cognitive decline from a previous level of performance in one or more cognitive domains — such as complex attention, executive function, learning, memory, language, perceptual-motor or social cognition.

Research has proven that physical activity improves cognitive function and can also improve brain function throughout a lifespan. Moreover, staying physically active has so many benefits as well. For example, doing exercise and fitness activities help build cells and natural pathways to help reduce changes in memory loss or dementia. Also, it has so many health benefits including long-term improvements to the cognitive function as the young adult reaching mid

From birth, the body and mind go through physical and cognitive changes that human beings will have to adapt to throughout life. Some individuals lose mental and physical abilities age they age that allow them to live a normal lifestyle. The most common age-related physical changes include hearing impairment, weakening vision, and the increasing probability of multiple chronic conditions such as arthritis, hypertension, heart disease, diabetes, and osteoporosis (Abeles, 1998). The most common cognitive changes associated with normal aging are short-term, or primary, memory loss, long-term, or secondary, memory loss, and the overall levels of performance in sustained attention. Other issues relative to aging and cognitive memory impairments are anxiety disorder, panic disorder, chronic pain, and mood disorders. This issue may cause several social, medical and family problems as individual

In the book Spark, written by Dr. John J. Ratey, he discusses how exercise can positively affect how your brain works. He provides studies and personal experiences to support the claims he makes. I always knew exercise would improve your life but never could have imagined how much it can affect your brain health as well. The chapter I thought spoke the most to me was chapter two, Learning: Grow Your Brain Cells.

Quadagno (2014) discusses ways cognitive abilities differ from young-adults, middle-old adults and oldest old adults. Cognitive decline can also be affected by conditions such as stroke, depression, diabetes, auditory, and vision problems. Older adults may also encounter age related cognitive decline in their daily lives. Cognitive abilities such as processing speed, episodic memory, working memory and dual task processing are abilities that researchers are aiming to improve in older adults (Basak, et al, 2008; Quadagno, 2014).

There is ample evidence to demonstrate that through the normal ageing process alterations to the brain in structure and function are directly related to cognitive changes (Glisky, 2007). With an increasing ageing population strategies for prevention of disease and age related cognitive decline are necessary to improve quality of life and reduce the associated healthcare costs (Australian Government Productivity Commission [AGPC], 2013). Physical exercise is known to be crucial in maintaining physiological health; it can also be used as a means of neuroprotection and assist in modifiable risk factors for improved brain health and subsequent cognitive function. This review will critically analyse current research into the effects of exercise

There are also cognitive changes during middle adulthood. There is a mixed pattern of positive and negative changes in cognitive abilities. Processing speed starts to decrease during this time period however crystallized thought does not decline until older age (pg. 456). Working memory begins to decline however semantic memory continues to increase as we learning throughout our older years (ph 456). Usually most memory decline is during older age and can be attributed to Alzheimer’s disease of dementia.

Many studies have been broad, studying the vocabulary, reasoning, memory, and speed of the person, but zoning in on one thing specific may lead to further understanding. Studying the effects of cognitive aging in relation to memory possibly will open so many more areas of study. Studying specific age groups could also be helpful when attempting to understand cognitive aging as a whole. Learning about how speed, memory, vocabulary, and reasoning all work within a child, 10-15 years old, might be helpful when comparing that data to that information of an adult. between 50-60 years

Why does the human brain age? Brain aging is a part of human life and a big part of society as the awareness for brain aging increases. Over time memory tends to become less efficient as we age and the neurons in the brain decreases (Bendheim, P.E. (2009). By 2050 in the US, 20 percent of the population will be 65 years or older. And as the elderly population increases, so will the incidence of age-related neurological disorders (Perlmutter, David. (2004). Therefor it is important to understand the aging brain, and how to keep the brain functioning as one ages.

One of the side effects of the normal aging process on the brain is the dilapidation of cerebral white matter, which according to previous studies correlates to poorer cognitive functioning. This research experiment is an in-depth study of the neurological components of aging in terms of white matter integrity, working memory, and cognitive function in relation to aerobic exercise. A team of scientists from various universities conducted this exercise intervention study and it spans a twelve-month period where participants were subject to a series of cognitive tests and digital imaging scans in addition to a newly implemented exercise program for one whole year. The main objective of the study was to assess and calculate the percentage (if any) of influence aerobic exercise has on cerebral white matter durability and corresponding cognitive functions in comparison to nonaerobic exercise. The researchers hypothesized to find a positive correlation between aerobic exercise and white matter integrity; they hoped to map these changes in particular regions throughout the brain (hypothetically) in an anterior-posterior descent. In order to assess the diffusion of white matter through specific regions of interest (ROI) in the brain measures of fractional anisotropy (FA), radial diffusion (RD), and axial diffusion (AD) were taken from each participant throughout the course of the experiment using diffusion tensor imaging (DTI). A DTI maps the structural properties of

Having a “Brain Healthy Lifestyle” (Bend, 2014) is made up of several different categories that include “physical health, brain fitness, and vitality” (Bend, 2014) as well as “balanced nutrition, stress management, and mental stimulation” (Sharpbrains, 2014). Our physical health plays a major part in brain function. Exercising our bodies, eating well, and getting the proper amount of sleep has a huge impact on our physical health. “Our brain requires 25% of the blood that is pumped by your heart. The healthier your heart is, the healthier your brain will be” (Bend, 2014). Cognitive fitness is demonstrated by uses of vocabulary, thinking, perception, and attention. It is crucial to make it a normal everyday practice to challenge our brains through new activities. Taking part in a cooking class or learning to

The articles by Erikson et al., Gatz, Korol et al., and Draganski et al. explore the concept of increased physical activity and/or mental activity having effects on the cognitive function and development or deterioration of the brain as we age. Although I agree that physical exercise is critical in increasing cognitive function because of the health benefits it provides, as well as the increased blood flow and circulation throughout the body, I ultimately believe that a healthy brain is not achieved solely by physical exercise or mental exercise, but both. I think there is a link between physical and mental exercise, and that the combination of these two activities creates higher cognitive functioning of the mind as well as the body. The mind and body come together and meet to make an overall healthy individual.