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Autonomic Nervous System
Autonomic Nervous System

... - part of diencephalon (1% of brain volume), located within the walls & floor of 3rd ventricle, constitutes an integrative center essential for survival & reproduction, that regulates and controls the complex interactions between physiology and behavior (temperature regulation, heart rate, blood pre ...
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... a. Stimulants- increase number of action potentials by increasing amounts of neurotransmitters in synapses b. Depressants- reduce ability of neurons to generate impulses ...
Central Nervous System Honors Biology Mr. Lee Room 320
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... – Lipid layer that covers most axons – Insulates the axon – Speeds up transmission of action potential – Produced by Schwann cells in the peripheral nervous system – Nodes of Ranvier- gaps in the myelin sheath ...
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... The stretch reflex is a monosynaptic, postural reflex that among the others works against the gravity force. First of all it is important to mention that muscles are attached to tendons which hold them to the bone. At the attachment of the muscles to tendons there is a muscle spindle which is very s ...
Slide 1
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... blood pressure in humans. The arrow indicates the plasma AVP concentration at basal plasma osmolality, volume, and blood pressure. Modified with permission from Robertson (1986). Copyright © 2014 Elsevier Inc. All rights reserved. ...
Peripheral Nervous System
Peripheral Nervous System

... Dendrites- receive messages, impulses, and send them to the cell body. Axons- send messages away from the cell body. ...
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... dementia, characterized by confusion, memory loss, and a variety of other symptoms. It rises from 10% at age 65 and 35% at age 85. • AD is difficult to make while the patient is alive because it is a form of dementia. • Parkinson’s Disease- a motor disorder characterized by difficulty in initiating ...
NERVOUS SYSTEM
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... Most cranial nerves are mixed, but some are sensory. Only the vagus nerve extends to thoracic and abdominal cavities. (Cranial nerves are listed in table 7.1.) Spinal nerves – 31 pairs of mixed nerves are formed by the union of dorsal and ventral roots of spinal cord. The spinal nerves divide into d ...
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... pentose-phosphate pathway (PPP) switch, redox status, and survival of neurons. During glutamatergic neurotransmission, (APC/C)-Cdh1 is inhibited leading to PFKFB3 stabilization, glycolysis activation and PPP inhibition in neurons. This unavoidably leads to oxidative stress, since the intrinsic antio ...
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... a) passes sensory input from body to cerebral cortex b. epithalamus 1) small area superior and posterior to the thalamus 2) Functions: a) controls emotional & visceral response to odors b) contains pineal body – an endocrine gland i.) influences the onset of puberty c. hypothalamus 1) most inferior ...
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... neurons in the brain. Nerves – bundles of axons - Often located in the peripheral nervous system - Transmit information to various parts of the body  Types of Neurons 1. Sensory neuron (afferent neuron) – carry information from the senses to the spinal cord 2. Interneuron – makes connections to oth ...
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THE JOURNAL OF COMPARATIVE NEUROLOGY 460:80–93 (2003)
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... The cochlear root neurons (CRNs) are thought to mediate the auditory startle reflex (ASR) in the rat, which is widely used as a behavioral model for the investigation of the sensorimotor integration. CRNs project, among other targets, to the nucleus reticularis pontis caudalis (PnC), a major compone ...
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Axia College Material Appendix B Structures of the Nervous System

... is located in the spine and skull. This is the center of metabolic activity within each neuron. The cell body is also called the soma. This is the part of the vertebrate nervous system which is located outside the CNS (i.e. outside the spine and skull). ...
Lecture 2 (Neurons)
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Reticular Activating System
Reticular Activating System

... All sensory input that enters brain via the medulla is also sent to neurons of the reticular formation.  These neurons may monitor sensory input for importance.  May alert higher brain centers when critical input is detected. ...
Peripheral Nervous System
Peripheral Nervous System

... skin that a person can control – Sensory neurons which relay info about environment to CNS Reflex Arc – Motor neurons which initiate appropriate response ...
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Circumventricular organs

Circumventricular organs (CVOs) are structures in the brain that are characterized by their extensive vasculature and lack of a normal blood brain barrier (BBB). The CVOs allow for the linkage between the central nervous system and peripheral blood flow; additionally they are an integral part of neuroendocrine function. The lack of a blood brain barrier allows the CVOs to act as an alternative route for peptides and hormones in the neural tissue to the peripheral blood stream, while still protecting it from toxic substances. CVOs can be classified into (a) sensory and (b) secretory organs. The sensory organs include the area postrema (AP), the subfornical organ (SFO) and the vascular organ of lamina terminalis. They have the ability to sense plasma molecules and then pass that information into other regions of the brain. Through this, they provide direct information to the autonomic nervous system from the systemic circulation. The secretory organs include the subcommissural organ (SCO), the posterior pituitary, the pineal gland, the median eminence and the intermediate lobe of the pituitary gland. These organs are responsible for secreting hormones and glycoproteins into the peripheral vascular system using feedback from both the brain environment and external stimuli.All of the circumventricular organs, besides the SCO, contain extensive vasculature and fenestrated capillaries which leads to a ‘leaky’ BBB at the site of the organs. Furthermore, all CVOs contain neural tissue, allowing them to play a role in the neuroendocrine system. It is highly debated if the choroid plexus can be included as a CVO. It has a high concentration of fenestrated capillaries, but its lack of neural tissue and its primary role of producing cerebrospinal fluid (CSF) usually excludes the choroid plexus from the CVO classification.Research has also linked CVOs to body fluid regulation, cardiovascular functions, immune responses, thirst, feeding behavior and reproductive behavior.
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