Brainstem

1.2. Brain Development Brain development starts at the embryonic period, more specifically at the fifth week of pregnancy. Figure 1.1 illustrates the timeline of pregnancy by weeks and months of GA (16). In the first months of pregnancy and before birth, the brain experiences the most development and changes in shape, size and structure (17, 18). Most significantly, changes occur in the size of the brain and in the cortical folding. Growth continues rapidly until the brain is two to three years…

major types of opioid receptors, μ receptor or Mu receptors, κ receptor or kappa receptor and δ receptor or delta receptor. The μ receptor (Mu receptor) which contains three other subtypes of receptors, the μ1, μ2 and μ3 receptors. These exist in brainstems and the thalamus. Activation of these receptors cause sedation, pain relieved and euphoria as well as respiratory depression, constipation and physical dependence. The κ receptor or kappa receptor are present in the limbic system, the…

It receives and sends signals to other parts of the body. There are six main parts of the brain: the brainstem, the cerebellum, the frontal lobe, the parietal lobe, the occipital lobes, and the temporal lobes (“Part 2”). The effect of the injury depends on where it is centralized in the brain. For example, if one’s brain stem is injured, it may affect that…

What is the central nervous system? It’s a system which consists of the nerves in the brain and spinal cord. It gathers information about and reacts to internal and external stimulus. Don’t Shoot the Messenger Much of the CNS is made up of neurons. Each neuron has a cell body, which includes a soma with a nucleus, a nucleolus, a cytoplasm called the perikaryon, and wide branching extensions called dendrites. Dendrites are like antennae which receive signals from other neurons or body cells.…

1. Why is the study of Brain size a poor way to study the evolution of intellect: Describe 3 important characteristics relevant to the evolution of the brain and intelligence. The study of brain size is a poor way to study the evolution of intellect for the reason that brain size does not correlate well with intelligence within a species, but it can be with differences in intelligence between species through some adjustments for body size. One important characteristic relevant to the evolution…

but frustrated, troubled and left wanting more.” I disagree with Brooks on this. Blink is more about telling us about the first two seconds. Gladwell isn’t writing about neuroscience and what the neurons, photons, electrochemical signals, and the brainstem. Gladwell is telling us about our mind and how to us it more efficiently. Gladwell would have ruined the book if he started to talk more about the brain and the functions of each part. He is more focused on feelings and decision making, not…

Heroin Some people carry addictions as if it were a secret. They wouldn’t look like your typical drug addict. They were clean, took care of their kids, and lived life as if it were normal. That’s what Beth’s story was like. She was was your typical mom with beautiful children and a normal life. You never would’ve known she had an addiction. Beth started using drugs at a young age. She was between the age of 16 and 17, it started out as normal teenage experimentation. But painkillers became an…

Why Teenagers Aren’t Sleeping Enough Imagine this; you look inside a classroom. You will most likely find a teacher at the front of the class and students sitting at their desk. Yet, look closer, and you might notice a familiar trend: many of these students are not paying attention. Instead, they are dozing off or even completely asleep. At least once a week, more than one- quarter (28 percent) of high school students fall asleep in school, 22 percent fall asleep doing homework, and 14 percent…

Sex and The Brain: Neurophysiological Structures and Functions Much research has been conducted on the topic of sex in recent years due to the lack of research and explanation given to it. Schools, religions, and parental figures have all done much to prevent youth to experience these types of physical activities. Lectures about abstinence have hidden the reality of sex by telling people about STD’s and sinful natures, which is necessary in their own respect but not a worthy conclusion to the…

Mackenzie Johnson BIO 220-6 October 14, 2015 Parkinson’s Disease The topic that has been chosen for my research paper is Idiopathic Parkinsonism or Parkinson’s disease (PD). Parkinson’s is a neurodegenerative brain disorder that typically will progress slowly (3). It affects the nervous system of mostly elderly people and there is no cure for it. The major symptoms of PD include slowed movement, muscle stiffness, and tremors. “On average, about 1 to 2 out of 1,000 people have Parkinson’s”…