1. White matter is found on the outside or surface of the cord. It connects the cord and the brain and is made up of nerve fibres. White matter contains motor fibres which run down from the motor centre of the brain‚ the cerebrum and the cerebellum to the motor cells of the cord Sensory fibres also run up the cord from the sensory cells of the cord to the sensory centre of the brain. 2. ANTERIOR HORNS – The anterior horns of the spinal cord is the front grey matter section of the spinal
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Chiari malformation: A quantitative approach with MR imaging. J Comput Assist Tomogr 9:1033-1036‚ 1985). Presenting symptoms range from severe headache‚ nausea and vomiting to numbness‚ tingling and weakness. Symptoms may also relate to lower cranial nerve palsies‚ causing dysphagia or dysphonia. Neurologic signs may include spasticity‚ motor and sensory deficits. Neurootologic or neuroophthalmologic findings ranging from nystagmus to impaired visual acuity and papilledema (?) may also be
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2/27/12 A. Objective I. Activity 1-4: Eliciting a Nerve Impulse • Investigate what kinds of stimuli stimulate action potential. II. Activity 8: Nerve Conduction Velocity • Determine and compare the conduction velocities of different types of nerves. B. Introduction I. Activity 1-4: Eliciting a Nerve Impulse • In this experiment‚ we will be investigating what stimulates action potential on the nerve being tested on the oscillator. The factors that helped determine
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understand abnormality in the nerve that cause disorders. The objective of this study was to trigger a compound nerve action potentials (CAPs) and examine the effects of a stimulus voltage on a nerve and inspect their threshold‚ refractory period and also their velocity. Compound nerve action potentials (CAPs) are summed action potential of one nerve‚ one nerve consists of many neurons. We used the sciatic Lithobates pipiens nerve in this experiment‚ the sciatic nerve is long nerve‚ it extends from the buttocks
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Exercise 3 Neurophysiology of Nerve Impulses Eliciting (Generating) a Nerve Impulse 1. Why don’t the terms depolarization and action potential mean the same thing? They require different things. Action potential requires depolarization and repolarization. Depolarization doesn’t require anything. 2. What was the threshold voltage in Activity 1? 3.0V 3. What was the effect of increasing the voltage? How does this change correlate to changes in the nerve? The action potential increases
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REVIEW SHEET EXERCISE 3 Neurophysiology of Nerve Impulses NAME: LAB TIME/DATE: Eliciting (Generating) a Nerve Impulse 1. Why don’t the terms depolarization and action potential mean the same thing? Action potential is a quick depolarization followed by a repolarization. Depolarization is a one way trip. It also takes a substantial depolarization to cause an action potential. 2. What was the threshold voltage in Activity 1? 3.0 V 3. What was the effect of increasing the voltage?
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neighbor I would say it is very likely that she has damaged her oculomotor nerve. The oculomotor nerve innervates both the inferior rectus muscle and the levator palpebrae superioris. The inferior rectus muscle allows the eye to depress and abduct‚ if there were an injury to the oculomotor nerve it could cause the eye to retain this position. The levator palpebrae superioris allows the eyelid to elevate and damage to the nerve here would cause the inability to fully lift her right eyelid (Drake‚ Richard
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Introduction A nerve is an enclosed bundle of axons found in the peripheral nervous system (Easton 13). It is the pathway for electrochemical nerve impulses‚ which pass along axons of the peripheral organs. A neuron is a cell in the nervous system which plays many critical tasks like receiving sensory signals from the external and internal environments. Moreover‚ neurons join together these sensory responses to produce and transmit motor responses as a result of changes in membrane permeability
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There are positives and negatives of using a muscle building products like Creatine. Creatine obviously boost muscle building‚ but it comes with negatives. If not used properly it causes weight gain‚ and all of it is mostly water weight. So you have to know how to properly maintain your body if you’re going to use this supplement. However‚ I feel that the Pros outweigh the cons if used properly. Positives included added intensity in workouts to build more muscle mass‚ Enhanced athletic performance
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use of Nerve agents‚ and to a larger extent Chemical Weapons‚ is illegal according to United Nations Resolution 687 which passed in 1991. The production‚ stockpiling‚ and use of these weapons were banned by The Hague Convention of 1899 and the Geneva Protocol of 1925. All Nerve agents are fatal to the human body in the same way. Some are more potent‚ and some remain on the battlefield longer than others. Many factors play a role in how long a Nerve agent remains on the battlefield. Nerve agents come
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