Perioperative 5. Benzodiazepines ( Lorazepam/ Ativan) Classification: anesthetic adjuncts‚ antianxiety agents‚ sedative hypnotics Perioperative use: Decreases preoperative anxiety and provides amnesia. Adverse reactions: APNEA‚ CARDIAC ARREST‚ bradycardia‚ hypotension. Contraindications: Severe hypotension; Sleep apnea; OB‚ Lactation: Use in pregnancy and lactation may cause CNS depression. Do not use for pt. with seizure disorders. Interactions: Additive CNS depression with other CNS depressants
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Central Nervous System Stimulants Types Stimulants can range from mild legal forms like caffeine to severe illegal drugs like methamphetamines. Each type has different effects at different levels and all can be lethal if taken in excessive quantities. The first type is the cocaine family which consists of cocaine HCL‚ cocaine freebase or crack‚ and cocaine paste. Then there are a wide arrange of amphetamines which are synthetic versions of the ephedra plant like Adderall which is used to help with
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people) Normally‚ neurons in the central nervous system (the brain and spinal cord) cannot regenerate injured nerve fibers‚ limiting people’s ability to recover from brain or spinal cord injuries. Repair of the central nervous system and restoration of voluntary motor activity through axonal re-growth has long been considered impossible in mammals. Over the last decade‚ numerous attempts proved disappointing overall. While repair of the central nervous system has long been considered impossible have
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muscle. Peripheral muscle fatigue involves the motor units‚ such as motor neurons‚ peripheral nerves‚ motor endplates‚ and muscle fibers. There are two different sites where repeated contractions may cause muscle fatigue. One is the transmission mechanism‚ which is basically the neuromuscular junction‚ muscle membrane‚ and endoplasmic reticulum. The other one is the contractile mechanism‚ which is the muscle filament. A muscle fiber’s mechanical response declines with fatigue. Peripheral muscle fatigue
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of the peripheral nervous system involved in controlling emotions? The nervous system as a whole includes the Central Nervous System‚ consisting of brain and spinal cord‚ and the Peripheral Nervous System‚ whose nerve fibres connect all parts of the body with the central nervous system. The Peripheral Nervous System is further subdivided into two branches‚ the Somatic Nervous system and the Autonomic Nervous System. All these nerves are outside the Central Nervous System. The Somatic Nervous System
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cells and damage to the perineurium. Most of the deformities occurring from Leprosy are in fact due to trauma or a secondary infection. In a Leprosy infection one of the first symptoms are anesthesia to heat and cold. Leprosy affects the peripheral nervous system by attacking the myelin sheath surrounding the axons which affects the reliability and speed of nerve impulses. In other words‚ the nerve fibers are no longer insulated and nerve impulses cannot be conducted efficiently. There are different
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Matthew Cauli: Designer‚ Cover Design Introduction by Don Rauf Library of Congress Cataloging-in-Publication Data The brain and the nervous system / edited by Kara Rogers. p. cm. — (The human body) “In association with Britannica Educational Publishing‚ Rosen Educational services.” Includes bibliographical references and index. ISBN 978-1-61530-256-7 (eBook) 1. Nervous system—Popular works. 2. Brain—Popular works. I. Rogers‚ Kara. QP355.2.B725 2011 612.8—dc22 2010004639 On the cover: The human brain makes
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Sensory neurons send information from the body’s tissues and sensory organs inward to the brain and spinal cord‚ which process the information. Motor neurons carry outgoing information from the central nervous system to the body’s tissues.Interneurons in the central nervous system communicate internally and intervene between the sensory inputs and the motor outputs. The axons of some neurons are encased by a myelin sheath‚ which helps speed their impulses. A neural impulse‚ or action
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considered a transmitter. These four steps include the synthesis of a transmitter substance‚ the storage and release of the substance‚ its interaction with a receptor in the membrane‚ and the removal of the transmitter form the synaptic cleft. The nervous system makes use of two types of neurotransmitters: small-molecule transmitters (acetylcholine‚ amines and A.A) and neuroactive transmitters(peptides) 2. Neurons have developed a sophisticated ability to regulate the synthesis‚ storage‚ release‚ and
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__________ nervous system. a. sympathetic b. peripheral c.
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