Neuron Neurons Chapter Summaries

The nineteenth century saw an explosion in knowledge regarding the brain unlike any before. For centuries, the brain had been considered the seat of human intelligence. However, the brain of the classics was a singular organ of

The progress of neuroscience has been significant in the past 500 years. and with the advance of technology, there is yet a multitude of chapters left to write in the history books of neuroscience. The book The Tale of the Dueling Neurosurgeons: written by Sam Kean was an engrossing and captivating read. It gives the reader a better appreciation for the growing pains of neuroscience and provides an educational, albeit entertaining overview of the anatomy and physiology of the brain and nervous system. From the early life and discoveries of Santiago Ramón y Cajal and his fascination with Golgi’s method la razione nera, which allowed Cajal to deduct after observing

The brain is made up of neurons. The features that make up the neurons are dendrites which receive signals from other neurons. Another part of the neuron is the axon which holds microfibers that carry information inside the neuron from the detricals to the endpoints of the neurons called terminal branches. The neurons in the brain communicate with one another through neurotransmitters that release chemicals.

The book goes into details of how the brain evolved. Pinker explains what the human mind is, describing the emotions that linked to the brain. Telling this, he asserts the fact that human brain is not a brain. According to him, there are reasons why humans act rationally and irrationally. Pinker develops a relationship between the

As well as these there are also the axon of the cell which is covered in myelin sheaths which carried information away from the cell body and hands the action potentials, these are small short bursts of change in the electrical charge of the axon membrane through openings of ion channels, off to the following neurons dendrites through terminal buttons at the end of the axons. Whenever an action potential is passed through these terminal buttons it releases a chemicals that pass on the action potential on to the next neuron through the terminal button and dendrite connection. The chemicals that are

In Allan Jones’s presentation, A Map of the Brain, he explains his current project and why is essential to the modern day. Jones first starts off by giving the audience some background information about the brain. He states that the brain is a complex organ that receives around twenty percent of the blood from our hearts as well as twenty percent of the oxygen from our lungs. Jones explains that the brain is essential to the body because it controls everything we do. Even though the brain is very complex, it does not mean that it is not organized and structured. In the past century, scientists have created a blue stain that stains neuron bodies. This showed scientists that neurons were unevenly distributed throughout the brain depending on

As soon as the electrical signal reaches the end of the axon, mechanism of chemical alteration initiates. First, calcium ion spurt into the axon terminal, leading to the release of neurotransmitters “molecules released neurons which carries information to the adjacent cell”. Next, inside the axon terminal, neurotransmitter molecules are stored inside a membrane sac called vesicle. Finally, the neurotransmitter molecule is then discharged in synapse space to be delivered to post synaptic neuron.

I read the article, “Secrets of the Brain”, found in the February 2014 issue of National Geographic written by Carl Zimmer. I chose this subject because I have been fascinated with the brain and how it works. The research of the brain has been ongoing for many centuries now. The history in this article is interesting. It explained how scientists used to understand the brain and its inner workings. For example, “in the ancient world physicians believed that the brain was made of phlegm. Aristotle looked on it as a refrigerator, cooling of the fiery heart. From his time through the Renaissance, anatomists declared with great authority that our perceptions, emotions, reasoning, and actions were all the result of “animal spirits”—mysterious, unknowable vapors that swirled through cavities in our head and traveled through our bodies.” (Zimmer, p. 38)

The human nervous system is divided into two parts, the central nervous system and the peripheral nervous system. The central nervous system, CNS, is just the brain and spinal cord. The peripheral nervous system, PNS, includes the nerves and neurons that extend outwards from CNS, to transmit information to your limbs and organs for example. Communication between your cells is extremely important, neurons are the messengers that relay information to and from your brain.

     One of the most complex and fascinating things in the human body is the brain. The body is “capable of almost everything, but it would not be possible, without the brain receiving information, and analyzing the information.”

However, the most memorable thing I was able to see that day was the human brain. Looking at it, it didn’t look much different than models we had used in class. The student in charge of that section went over the fundamental parts of the brain, things I had studied for class. Though it was interesting, the moment that made it really real for me was the moment I was able to hold it. Holding it is my hand, the basic anatomy of the brain went away. I stood in an awed silence as I tried to imagine the things it had seen, had heard, the life it had lived. This was the motor to human existence. Though brains may look similar on the outside, on the inside they were so unique, so different, each like a snowflake, only ever occurring once. It was in that moment that I knew I wanted to learn all I could about this fascinating object that is the mind, unlock doors that had previously been closed, and leave the world a better place than I found it.

In modern research scientists, educators, nutritionists, psychiatrists, and geneticists are constantly working together to find out how the mind-body connection affects learning. Scientists are researching how our ability to generate new brain cells affects our abilities to learn. Research has shown that our brain develops new brain cells every day. This continues until we die. According to Palombo-Weiss, R. (1997), “it's our ability to generate new brain cells that accounts for the brain's plasticity-its ability to continue to learn and update its database. Scientists generally agree that each human being has approximately 100 billion neurons, each of

The human brain is a mystery that has been studied for centuries in attempt to understand how it functions. Scientists first thought that the brain was a structure that functioned a whole. It was in the early 1600’s where the first ideas of localisation of function in the brain started. At this time Rene Descartes discovered a tiny structure called the pineal

“The Human Brain”, by myPerspectives, is an informative article that claims that the brain is a complex organ that is truly impressive. The brain is a key part of the central nervous system, that controls the entire body’s activities, to simple things such as breathing. These actions are fired through neurons, that quickly travel through the spinal cord. Surprisingly, the brain transmits these messages at an unimaginable rate, at 150 miles per hour, through 85 billion cells, called neurons. These neurons can form up to 10,000 synapses, or connections to each other. By itself, the brain can create billions of synapses, which change the structure of the brain every time new information is learned. However, there is still much that scientists

Long term case-control studies with the focus on the development of autistic brains have reported a rise in head growth during the first year in children suffering from autism. In early childhood, the growth of the head is tightly linked to the brain growth, which has shown an overgrowth in an autistic brain.