Multiple Sclerosis‚ also known as MS‚ is a disease causing demylination of the white matter in the spinal cord and brain. The nerve damage slows‚ blocks or distorts transmission of nerve impulses. MS is characterized by periods of exacerbation and remissions. The crippling disease is a major cause of chronic disability in young adults. It usually becomes symptomatic between the ages of twenty and forty with twenty-seven being the average. Prognosis varies greatly from person to person. MS can progress
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LABORATORY REPORT Activity 2 Twitch Contractions and Summation Name Instructor Date PREDICTIONS Effect of Muscle Fiber Length on Contraction 1. As muscle fiber length increases Effect of Stimulation Frequency on Contraction 2. As the frequency of stimulation increases‚ the force of contraction MATERIALS AND METHODS Measurement of Threshold Stimulus 1. Dependent Variable 2. Independent Variable 3. Controlled Variables Effect of Muscle Length on Contraction 1. Dependent Variable 2. Independent Variable
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There are three main nerves in your hand radial nerve‚ median nerve‚ and ulnar nerve. Each one of these gives movement and feeling to different areas of the hand. The ulnar nerve is one of the three main nerves in your arm. It travels from your neck down into your hand. The most common place for this nerve is behind the inside part of the elbow. The radial nerve descends down the arm with in the triceps with in the upper arm. Then moves down the arm within the humerus also known as the radial
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Genetic Disease Research Paper Canavan Disease By Lexi Kasowski Canavan disease is a Leukodystrophy‚ which is one of several neurological disorders where the brain deteriorates because of a defective inherited gene. Canavan disease is more often with Ashkenazi Jews and Saudi Arabians‚ even though all ethnic groups can get it. Canavan prevents the correct transmission of nerve signals. The Symptoms of Canavan are a fast‚ rapid increasing head circumference‚ inability to control your head‚
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There have been multiple theories considered to explain the process of referred pain. One theory discusses the branching of peripheral nociceptive afferent fibres that has a receptive field in both the local and referred pain area.1 The limitation for this theory is that these bifurcated fibres are rare‚ fibres don’t generally branch over such large distances‚ semi-directional nature of referred pain & the latency of onset.2 This theory implies that if one receptive field is stimulated it will lead
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Through the years scientists have discovered that there is more to the brain than previously thought. They have learned that inside the brain there is a synapse or an area that is open between the axon of a nerve and the dendrite of another nerve. The synapse entails the neurotransmitters‚ mitochondria‚ postsynaptic ending that has receptors sites for the neurotransmitters‚ and a synaptic cleft. When alcohol is consumed and reaches the brain‚ it can alter neuron membranes‚ ion channels‚ enzymes
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Week 3 Quiz ------------------------------------------------- Return to Assessment List Part 1 of 6 - | 18.0/ 21.0 Points | Question 1 of 32 | 3.0/ 3.0 Points | The endosteum | | | A. lines the medullary cavity. | | | | B. is the unit of compact bone. | | | | C. contains red bone marrow. | | | | D. surrounds the bone surface. | | | | E. is the end of long bones. | | Feedback: Good job! | Question 2 of 32 | 3.0/ 3.0 Points | The site where
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Auditory processing is a term used to describe what happens when your brain recognizes and interprets the sounds around you. Humans hear when energy that we recognize as sound travels through the ear and is changed into electrical information that can be interpreted by the brain. The "disorder" part of auditory processing disorder means that something is adversely affecting the processing or interpretation of the information. Auditory Processing Disorder is an impaired ability to attend to‚ discriminate
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Neurotransmitters 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
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What Is Neurotransmitter? Neurotransmitter is a chemical that is released from a nerve cell which thereby transmits an impulse from a nerve cell to another nerve‚ muscle‚ organ or other tissue. (Webster new world medicine dictionary. http://www.medterms.com/script/main/art.asp?articlekey=9973) What are Hormones? Hormones are chemicals that carry messages from organs of your body to your cells. The glands that secrete hormones are part of the endocrine system (pituitary‚ thyroid‚ adrenals
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