MRI of the lumbar spine dated 5/27/16 showed disk desiccation at L5-S1. A 3 mm posterior disk protrusion is noted at this level‚ which abuts but does not efface the thecal sac. In the lateral recesses‚ there is abutment of the budding bilateral S1 nerve roots. Small synovial fluid lines the facet joints.
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Exercise 3 Neurophysiology of Nerve Impulses Activity 1 1. What happens to the resting membrane potential when extracellular K+ concentration is increased? -The resting membrane potential will become more positive when K+ concentration is increased. 2. Explain why the resting membrane potential had the same value in the cell body and in the axon. -The resting membrane potential has the same value in the cell body and the axon because the typical resting membrane potential is the same throughout
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Activity 1: The Resting Membrane Potential Pre-lab Quiz Results 1. What is the approximate concentration of K+ inside a typical cell (intracellular concentration)? a. 150 mM 2. What is the approximate concentration of K+ outside a cell (extracellular concentration)? b. 5 mM 3. What is the approximate concentration of Na+ inside a cell (intracellular concentration)? b. 5 mM 4. What is the approximate concentration of Na+ outside a cell (extracellular concentration)? a. 150 mM Experiment
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Sannu’s Story A. In Sannu’s case why is there both sensory loss and muscle weakness? Leprosy is a disease that has been known since biblical times. It causes skin sores‚ nerve damage‚ and muscle weakness that gets worse over time. Leprosy is caused by the bacterium Mycobacterium leprae. It is not very contagious and it has a long incubation period (time before symptoms appear)‚ which makes it hard to know where or when someone caught the disease. Children are more likely than adults to get the
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Chapter 11 – Fundamentals of the Nervous System and Nervous Tissue I. The 3 Overlapping Functions: a. Sensory Input: b. Integration: c. Motor Output: II. Levels of Organization in the Nervous System: a. Central Nervous System (CNS): b. Peripheral Nervous System (PNS): i. Sensory (afferent) Division: ii. Motor (efferent) Division: 1. Somatic Nervous System: 2. Autonomic Nervous System (ANS): a. Sympathetic Division: b. Parasympathetic
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DOI: 10/1/2014. The patient is a 53-year old male route sales representative who sustained a work-related injury to his bilateral wrists from lifting carts of clothes. As per OMNI entry‚ he was initially diagnosed with bilateral wrist sprain/strain. MRI of the Left Wrist dated 03/05/2015 showed a small radioulnar joint effusion and subchondral cyst formation. MRI of the Right Wrist dated 03/12/2015 showed subchondral cyst formation. Physical therapy initial report dated 06/11/2015 revealed that the
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Experiment Results Predict Question: Predict Question 1: How will the conduction velocity in the B fiber compare with that in the A Fiber? Your answer : b. The conduction velocity in the B fiber will be slower because the B fiber has a smaller diameter and less myelination. Predict Question 2: How will the conduction velocity in the C fiber compare with that in the B Fiber? Your answer : d. The conduction velocity will be the same in both fibers. Stop & Think Questions: 3. Note the difference
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follows: Red: Sodium ion channels and sodium ions Blue: Potassium ion channels and potassium ions Page 1. Introduction • Neurons communicate over long distances by generating and sending an electrical signal called a nerve impulse‚ or action potential. Page 2. Goals • To understand that rapid changes in permeability of the neuronal membrane produce the action potential. • To recognize
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Guillain-Barre syndrome is a rare but serious autoimmune disorder in which the immune system attacks healthy nerve cells in your peripheral nervous system. This leads to weakness‚ numbness‚ and tingling. It can eventually cause paralysis. This cause of this condition is unknown‚ but it’s typically triggered by an infectious illness‚ such as the stomach flu or a lung infection. Guillain-Barre is rare‚ affecting only about 1 in 100‚000 ‚ according to the National Institute of Neurological Disorders
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In relation to an Action Potential – define the terms threshold‚ hyperpolarization‚ depolarization‚ repolarization and all-or-none-phenomenon. 6. Draw and label the structural components of the the NMJ and explain the events that happen when a nerve impulse reaches the NMJ. 7. What is meant by excitation-contraction coupling? 8. What are the parts of the skeletal muscle triad and what are their functions? 9. Explain the cross bridge cycle‚ and why a filaments do not slide back to their
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