Generation of pattern and diversity in Central Nervous System Central nervous system (CNS) is composed of brain and the spinal cord. Neurons constitute a major part of the developing CNS. An axon is an extension of a neuron. The brain grows as a swelling at the front (rostal) end of the neural tube and later leads to become a spinal cord (1,2). Development of the CNS involves many complex mechanisms beginning at the onset of transformation of a single layer of ectodermal cells, the neuroectoderm
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In order to understand how the nervous system can function, we first need to take a look at the different types of cells. The nervous system is built up by neurons and supporting cells. Neurons are the cells that actually conduct the signals, whereas the supporting cells are there to provide structure and assist the neurons. Neurons The neuron is the unit that is necessary for the nervous system to function. It transports signals form one part of the body to another. There are many different types
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Chapter 8 The Nervous System 1. Terms 1. Encephalitis—The inflammation of the brain or spinal coed tissue largely caused by a virus that enters the CNS when the person experiences a viral disease such as measles or mumps or through the bite of a mosquito or tick. 2. Hydrocephalus—An abnormal increase of cerebrospinal fluid in the brain that causes the ventricles of the brain to dialate, resulting in an increased head circumference in the infant with open fontanel(s); a congenital disorder
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The nervous system is made up of neurones and is basically the control centre of your body, it's job is to communicate by sending messages and receiving them. The nervous system receives specific messages from the brain to then send off to a specific part of the body to perform a movement or task (Hillendale, 2014). There are two parts to the nervous system. These are called the 'Central Nervous System' (CNS) and 'Peripheral Nervous System' (PNS). The Central Nervous System consists of the brain
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human body is comprised of complex systems, many of which occur automatically or without conscious thought. These involuntary systems allow for maintenance of heartbeat, blood pressure, breathing, digestion, excretion, thermoregulation, visual accommodation, and procreation. Automatic or involuntary processes occur due to the actions of organs, hormones from the endocrine system, and neuron communication from the nervous system. The portion of the nervous system that regulates these involuntary
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The autonomic nervous system, ANS for short, is a subdivision of the peripheral nervous system; which is responsible for regulation of homeostasis and coordinates the functions of the cardiovascular, respiratory, digestive, excretory, and reproductive systems. The ANS is like the Somatic Nervous System as they both have afferent and efferent neurons; while in the ANS, the afferent pathways originate in visceral receptors and efferent pathways attach to the visceral effector organs. ANS can be further
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10.1 STROKE This concept was taken from module 10 “Assessment of nervous system”, Sub-topic 3 “common abnormalities and assessment findings of nervous system”. Stroke is a condition of both the nervous and cardio-vascular system. Stroke is a condition of brain damage which results due to shortage of blood supply. The blood supply to the arteries of the brain is reduced leading to brain damage. This result from shortage of blood supply and glucose supply to the brain. In the US it is the fourth
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Aging changes in the nervous system URL of this page: http://www.nlm.nih.gov/medlineplus/ency/article/004023.htm As people age, their brain and nervous system go through natural changes. The brain and spinal cord lose nerve cells and weight. Nerve cells may begin to transmit messages more slowly than in the past. Waste products can collect in the brain tissue as nerve cells break down, causing abnormal structures called plaques and tangles to form. A fatty brown pigment (lipofuscin) can also
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) Nervous systems, function and survival Invertebrates and vertebrates are compiled of many different cells, systems and functioning pathways all of which are maintained by homeostasis. In this essay I will discuss the connection between homeostasis and the nervous system; briefly compare an invertebrates and vertebrates nervous system; nerve cells and how an organism’s behaviour can be determined by these factors. To survive every living organism endeavours to maintain
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Control and co-ordination The role of the Nervous and Endocrine system. The endocrine system and the nervous are basic systems in the body of animals that assist in the relaying of impulses or communication from one body part to another. They can both act together for these functions or separately. However, it will be prime for us to understand both functionalities. The nervous system constitutes of the foundation in which the body’s communication system is built. It constitutes of a group and
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