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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sciatic nerve‚ speed of transmission and degree of myelination can all have an effect on the sciatic nerve and therefore the peak contractile force of B. Marinus. The diameter of the axon in the sciatic nerve would impact how fast the action potential is conceived down the axon to the synaptic cleft and muscle (Firmin‚ L. 2014). If one of the toads had a smaller axon diameter it would allow for resistance to movement to occur due to friction. The diameter of the axon in the sciatic nerve would therefore
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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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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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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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reflex arc‚ study the time taken between a stimulus and a response‚ how the spinal cord and peripheral nerves function‚ and how to measure and record response time related to a stimulus using the Labscribe software. For the second part of the lab‚ electromyograms will be triggered and recorded in order to study the Achilles and patellar stretch reflex and the reflex arc. Also‚ to understand nerve conduction velocity‚ EMG‚ and motor control. 2. The objectives of the first part of this lab is to
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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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The Germen chemist Dr. Gerhard Schrader was given a task to develop a pesticide. In just two years tabun was born‚ it had extremely high toxicity and was the first of the substances later referred to as nerve agents. A factory was built and produced during the years of 1942-1945 12‚000 tons of the chemical warfare agent tabun was made; in which the allies took large quantities of tabun at the end of the war. Even though Hitler and his army were losing the war‚ Schrader and his co-workers synthesized
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slight improvement in the ability to move the foot. He had weakness with dorsiflexion of the ankle and with moving his toes. He was evaluated by an orthopedic doctor and a repair of ligaments of the knee was recommended. However‚ there was concern of nerve involvement as well. Electrodiagnostic tests carried out demonstrated a connected‚ but abnormal peroneal but also tibial component function. When the patient went in for a physical examination‚ he was wearing a brace on his left knee with extensive
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spinal stenosis at this level. In addition‚ there is a disc osteophyte complex and disc space narrowing at L5-S1 with mild spinal stenosis and left greater than right mild foraminal stenosis. Furthermore‚ there is impingement upon the left L5 nerve root. EMG and nerve conduction report dated 05/06/14 revealed evidence of bilateral L5 lumbar radiculopathy and bilateral peripheral neuropathy. Per operative reports‚ IW underwent left L4-5 and L5-S1 transforaminal ESI on 11/07/2014; 05/15/2015; and 07/24/2015
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