The leech nervous system consists of a brain connected to a ventral nerve cord. This nerve cord is further made up of segmental ganglia (Titlow, 2013). Within each ganglia are many other types of cells that can be distinguished by their general properties and by the electrical signals that they initiate (Titlow,2013). Titlow’s experiment classified some of these types of cells based on their general properties: R-Retzius cells, P- pressure, T- touch, N-nociceptive, AE- annulus erector (2013). In
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disease involves the breaking down or death of nerve cells in the brain, most notably in an area known as the substantia nigra. The substantia nigra, which is a Latin term for “black substance,” is a movement control center found in the midbrain as part of the basal ganglia. The substantia nigra has a high concentration of neurons that produce and release dopamine, a neurotransmitter that relays messages to other parts of the brain to control body movements. PD causes dopamine production to decrease
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minor, sporadic memory loss. These characteristics eventually worsen, impairing cognitive abilities like language skills and decision making. An intense loss of all mental function then occurs and correlates to the decline in breakdown of specific brain neuron connections. All of this compounds, leading to the eventual death of the affected person. AD is the most common
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First, I appreciate your candor and secondly, there is nothing wrong with you! Granted we can chew gum and walk at the same time; however, I have learned that multitasking simply does not exist; it is an illusion, a myth. We task switch or background task, in which one activity consumes our attention while we’re mindlessly performing another; in other words, the concept of divided attention. I admit that I thought I was the Wonder Woman of multitasking; yet, when I reflect back I actually was not
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throughout the body . The nervous system is that system.The nervous system is made from two main parts. The central nervous system, that’s made up of the brain, the brainstem, and spinal cord. The other is the peripheral nervous system, which is the sections of the nerve fibers that extends to the extremities and into other regions of the body. The brain is composed of 2 types of “tissues” known as the gray matter and the white matter. Gray matter is made up of dendrites and axon terminals and fats.
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Introduction Multiple sclerosis (MS) is a disease of the brain and spinal cord (central nervous system). It causes the body's disease-fighting (immune) system to destroy the protective covering (myelin sheath) around nerves in the brain. When this happens, signals from the brain do not get sent properly or may not get sent at all. There are several types of MS: Relapsing-remitting MS. This is the most common type. This causes sudden attacks of symptoms. After an attack, you may recover completely
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Anencephaly occurs when the upper part of the neutral tube dose not close all the way (Facts about Anencephaly). Typically this causes the baby to be born without the front part of the brain and thinking and coordinating parts leaving the rest of the brain to be not cover by bone or skin. The causes for Anencephaly to happen are unknown. For some babies is occurs because of a change in their genes. It could also be caused by things that the mother encounter while pregnant
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Mind Readers: By Phillip Ross Phillip Ross, contributing editor of Scientific American magazine, writes an article of a potential way to scan a brain and interpret thoughts as well as separate the truth from falsity. He starts off the article, imagining a world where one could see through to the truth. “Human society would be orderly, boring and as alien as an anthill,” he notes. If only there was a machine to read others’ minds… There is such a machine, but to some extent, can only measure
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unsettling thoughts and repetitive, ritualistic behaviors. This essay discusses the neuroanatomical, neurophysiological and neural psychological aspects of obsessive compulsive disorder. A range of studies have identified several regions within the brain thought to contribute to the disorder including the orbitofrontal cortex, important in reward based learning, the anterior cingulate cortex, important in error detection, the basal nuclei, involved in motor control, and the thalamus, involved in processing
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(Pal & Mallick, 2007), was researched in the study section of this unit and is discussed, as it relates to neuroanatomical structures. The reading stated that GABA is an amino acid, and denoted as the most important inhibitory neurotransmitter in the brain (Carlson, 2013). Additionally, GABAergic can work on several areas of the neuroanatomical structure, for example, in the pontine reticular formation, where GABAergic REM-on Cells works with other neurons in ventrolateral preoptic area (VLPO) to inhibit
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