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Essays on the human brain
Essays on the human brain
Differences in the hemispheres of the brain
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Humans can identify galaxies light years away from earth, they can study particles smaller than atom, but they have not yet completely discovered the mystery of the three pound of matter that flows in their head. The brain is considered the most complex device in the universe. Scientist learned more about the it for the last five years than the five thousand years ago.
The human brain is the command center of the human body, it gives each individual his personality. It collects information from outer and inner sensation areas, it also controls thoughts and movement. A better, effective and simpler way to discover this complicated organ scientist have defined it in to parts and regions. The biggest part in the brain called cerebrum, which divided
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The outer layer “cortex” is only three point seventeen millimeters. But it also holds millions of cells with fibers the transports information through the brain areas. Hundreds of folded lines that hold two third of the brain surface makes the wiggly visible, unlike animals that are less intelligent, where they have a smoother brain surface. The cortex contains four parts, first the frontal lobe is responsible for these following functionalities, emotions, higher thinking skills like problem solving, personality and controlling movement. The frontal lobe keeps developing until the age of twenty-six. Second the Temporal Lobe receives information about hearing and helps process language, reading, and other senses. Third the Parietal Lobe is related with the senses such as attention and language. last the Occipital lobe provides information about the vision including identifying the differences of shapes and colors. Now the Thalamus is located in the center of the brain sends sensory and motor information and controls the chemical signals of sleep, consciousness, and alertness. Twelve pairs of cranial nerves relays data from the sensory motor to and …show more content…
It holds the key reward which releases chemicals dopamine that produce the sense of pleasure. That feeling drives human to repeat his behavior like eating, drink, having fun, or making love. But it also may push some others try to hunt that feeling repeatedly by seeking drugs. Nerve cells or neurons, they share same structure as other cells but they have electric and chemical that uses it to transfer information among themselves. The brain is made up of billions of neurons. Although they are different in shape and size, some of them less than a millimeter long and other that runs the whole length of a human leg. No matter how big it is they all contain three basic parts, the Soma contains the nucleus, DNA, mitochondria and ribosomes, the Dendrites is the receiver, receives messages from other neurons, and the Axon is the sender it sends messages through to other neurons, glands or muscles. The contact between the neurons known as synapses, they are extremely small gaps. There are over a hundred-different type of neurotransmitters. When somebody takes drug, it affects the neurotransmitters to burst out through during the synaptic gap and blocks it from coming back as they should. And that is the reason why the person feels
The brain is an organ that regulates body functions, behaviors, and emotions. Neurons are the cells that fulfill these functions. How do neurons do this? A neuron plays an important role in the central nervous system. Why? Because neurons regulate how we think, feel, and control our body functions. A typical neuron has three parts: cell body, axon, and dendrites. When a neuron receives an electrical impulse, that impulse travels
The brain has four major lobes. The frontal lobe, the parietal lobe, the occipital lobe, and temporal lobe are responsible for all of the activities of the body, from seeing, hearing, tasting, to touching, moving, and even memory. After many years of debating, scientist presents what they called the localization issue, Garret explains how Fritsch and Hitzig studied dog with conforming observations, but the cases of Phineas Gage’s accident in 1848 and Paul Broca’s autopsy of a man brain in 1861 really grabbed the attention of an enthusiastic scientific community (Garret 2015 p.6)
Here the sensory data is stored and consists mainly of the senses found within the body which comprises of taste, touch, smell, temperature. Here these senses are integrated and processed before being transported to the necessary region to fulfil the response. If the parietal lobe was severed or damaged the human body would not be able to function properly as in the human body would not be to feel nor touch nor sense the feeling of being touch due the damaged that controls this motion in the parietal
Neurotransmitters are chemicals made by neurons and used by them to transmit signals to the other neurons or non-neuronal cells (e.g., skeletal muscle; myocardium, pineal glandular cells) that they innervate. The neurotransmitters produce their effects by being released into synapses when their neuron of origin fires (i.e., becomes depolarized) and then attaching to receptors in the membrane of the post-synaptic cells. This causes changes in the fluxes of particular ions across that membrane, making cells more likely to become depolarized, if the neurotransmitter happens to be excitatory, or less likely if it is inhibitory.
The temporal lobe is a vital area of the brain for many of the human abilities such as memory and auditory processing, and also language. The neuropsychologist responsibility is for evaluating problems in this area when dealing with clients and implementing therapy solutions. Also the duties of a neuropsychologist are in the aspects of research. and developing tools to assist people with temporal lobe. malfunctions and other areas of the body.
It is the most important part of the body, because without a brain, none of us would be alive. In the brain, there are the cerebrum, the cerebellum, and the brain stem. The cerebrum holds memories, controls movement, and does problem solving and thinking. It is the biggest part of your brain. The cerebellum is underneath the cerebrum and controls coordination and balance.
The brain consists of both neurons and glia cells. The neurons, which are cells housed in a cell body called a Soma, have branches which extend from them, referred to as dendrites. From these dendrites extend axons which send and receive impulses, ending at junction points called synapses. It is at these synapse points that the transfer of information takes place.
A bunch of nerves put together is called the Nervous system. The Nervous system helps with body coordination and provides sensory information about external problems. The nervous system controls the brain, spinal cord, sense organs, etc. Without our nervous system, we would not be able to function, since
The brain is the control center of the human body. It sends and receives millions of signals every second, day and night, in the form of hormones, nerve impulses, and chemical messengers. This exchange of information makes us move, eat, sleep, and think.
This lobe is also located in the cerebral hemisphere. The parietal lobe is focused on comprehension, language, reading. It also monitors all sensory comprehension. The pariental lobe has two parts. The sensory cortex and motor cortex. The sensory cortex, is located in the front part of the parietal lobe, it recieves information from the spinal cord about the different positions of various parts and how they move. This area of the brain affects area 's like sense of touch and relays if there is pain or pressure to different parts of the body. The motor cortex 's main function is to monitor and control movement of the body. It is located in the top, middle portion of the
The left and right hemispheres of the brain are each divided into sections. Within each sections are lobes, controlling such processes as our visualization, our movement, and our personalities. For instance, the occipital lobe in the back of our brain is responsible for processing vision, and the frontal lobe behind our forehead controls cognition and personality. The lobes of the brain are split between the right and left hemispheres of the brain. This well-designed arrangement is for the lobes to function correctly, so the two hemispheres of the brain can communicate with one
It contains the primary motor cortex and the prefrontal cortex, which extend from the central sulcus to the anterior of the brain. The posterior part of the frontal lobe is the precentral gyrus which is specialized in the control of fine movements. The very most anterior portion of the frontal lobe is the prefrontal cortex. The neurons in this area have up to sixteen times as many dendritic spines as neurons in the occipital lobe or primary visual cortex. As a result, the prefrontal cortex is able to integrate a great deal of information (Kalat, 2004).
The human body is divided into many different parts called organs. All of the parts are controlled by an organ called the brain, which is located in the head. The brain weighs about 2. 75 pounds, and has a whitish-pink appearance. The brain is made up of many cells, and is the control centre of the body. The brain flashes messages out to all the other parts of the body.
The occipital lobe is similar to the uncle who can’t put down his camera- the occipital lobe is responsible with processing in the visual information. In the corner, you might find the great-aunt who can’t hold back the tears. This holiday dinner has brought back the memories of past dinners, where her husband joined them before he passed away. Likewise, the amygdala helps with emotions and memories.
The most basic elements of a neural network, the artificial neurons, are modeled after the neurons of the brain. The "real" neuron is composed of four parts: the dendrites, soma, axon, and the synapse. The dendrites receive input from other neuron's synapses, the soma processes the information received, the axon carries the action potential which fires the neuron when a threshold is breached, and the synapse is where the neuron sends its output, which are in the form of neurotransmitters, to the dendrites of other neurons. Each neuron in the human brain can connect with up to 200,000 other neurons. The power and processing of the human brain comes from multitude of these basic components and the many thousands of connections between them.