Nerve

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    Sciatic Nerve Experiment

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    differences and the relationships of the isolated sciatic nerve in regards to the compound action potential and the neuromuscular junction stimulations of the Rana pipens gastrocnemius. A total of five exercises were used to identify the effects on the stimulation of the sciatic nerve and the gastrocnemius. A dissection for both labs were performed to isolate the nerve and to isolate the gastrocnemius. Both experiments used LabChart to perform various stimulations on the sciatic nerve and the gastrocnemius muscle to observe the level of intensity, contraction, and voltage threshold caused by different stimulation pulses. Introduction When a neuron produces an action potential it could be due to chemical…

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    A nerve cell is also called a motor neuron, which is made from a cell body, an axon and axon terminals. The cell body contains a nucleus and dendrites that receive the signals and send it down the axon that is covered in myelin sheath. The axon terminals are connected to the muscles creating a neuromuscular junction. This is where the signal is relayed to the muscle. There are two groups of motor neurons: upper and lower. Upper motor neurons are those found in the brain and lower motor neurons…

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    Isometric Force Lab Report

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    executed. External electrical stimulation of the ulnar nerve activated large then small motor units, because large myelinated axons are activated at lower threshold stimulus currents than smaller ones. Thus one would observe summation of the action potentials as the stimulus is increased due to an increase in the frequency of the firing of action potentials across multiple motor units. This is exactly what was observed in the compound action potential recordings in Figure 2, which showed that…

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    The principal effect that make people continue smoking is that the drug excites neural activity and speed body functions. In other words, it makes the body feel good every time he/she smokes because the drug (cigarettes) helps keep motivated the body and feel energetic throughout the year. That is why it is really difficult a person stops smoking. Although, at the same time the drug is killing nerve cells in the brain because it has strong toxins that it can damage the nerve cells and kill them.…

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    Polyradiculitis, otherwise known as a variant of Guillain-Barre Syndrome (GBS), is a very rare disease where the immune system attacks the spinal nerve roots. Fewer than 20,000 a year get this disease, and I was one of them. It was one day in the early April of 2001. I was a healthy three year old toddler that went from running around and climbing on furniture to not being able to walk. My mom started to notice that I wasn’t walking; but instead I was pulling myself across the floor. I also had…

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    separate functions and organs and also have their own fair share of problems. The muscular system composes of the tissues and organs that are used to exert a force, whether under voluntary or involuntary control. Muscles are composed of long, slender cells called fibers, and these fibers come in bundles with very few or countless amounts per bundle. Muscles move by either contracting or extending, which is directed by nerve impulses sent from the central nervous system. There are three main…

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    Cranial Nerve

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    7 cranial nerve pairs out of 12 pairs in human nervous system function more or less in speech or hearing; these are the cranial nerves V (Trigeminal), VII (Facial), VIII (Vestibulocochlear), IX (Glossopharyngeal), X (Vagus), XI (Spinal Accessory), and XII (Hypoglossal). These have particular roles other than assisting speech or hearing. Furthermore, most clinical tests for cranial nerve functions neither are recommended to be performed by speech and hearing pathologists, nor are they related to…

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    Charcot-Marie-Tooth (CMT) Disease Charcot-Marie-Tooth Disease which is also called CMT. It is said in National Institute of Neurological Disorders and Stroke “That the physicians Jean-Martin Charcot, Pierre Marie, and Howard Henry Tooth. In 1886 Charcot, Marie, and Tooth discovered a group of progressive disorders that affects the peripheral nerves” (NINDS). They still consider this disease to being rare in the United states. The estimated amount of people who are diagnosed is fewer than 175,00…

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    Only 1 in 100,000 people have to experience this scarce syndrome; Guillain Barre could possibly temporary have a serious affliction on the individual’s life, some of which we have heard of. Take Franklin D. Roosevelt for example, he suffered from Guillain Barre or also commonly known as “GBS” experienced a fight with this nerve damaging infection. GBS progressively starts to own a person’s life, being educated about this disease, the symptoms and effects, and the treatments will be beneficial. …

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    Nerves and muscles in the body send electrical signals throughout the body- sending and receiving messages to the brain. Electro diagnostic testing helps the doctor to get a better understanding of how those electrical signals are functioning in the body. There are two types of electro diagnostic testing; Electromyography, more commonly known as an EMG, and Nerve Conduction Studies, or NCS. An EMG allows the doctor to monitor and understand the electrical action that takes place within the body.…

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