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2013年1月12日托福写作真题回忆
2013年1月12日托福写作真题回忆

... (B) describing the presence of endorphins in the brain and discussing ways the body blocks pain within the brain itself. ...
Nervous System
Nervous System

... Kingdom, they have a network of nerves that conducts signals from sensory cells to muscle cells. But their nervous system is not centralized. 3) Many flatworms have a netlike nerve system like cnidarians but some have a more organized and complex system with a brain and spinal chord. The nervous sys ...
Modeling the brain
Modeling the brain

... Information transport within the neuron is electrochemical ...
Major Parts of the Brain:
Major Parts of the Brain:

... 9. _____ balance and coordination 10. _____ processes visual and auditory information, generates involuntary motor responses, maintains consciousness 11. _____ connects the cerebellum to the brain stem and is involved in motor control 12. _____ regulates heart rate, blood pressure, respiration, and ...
An Examination of the cell densities in Fmr1Ko mice
An Examination of the cell densities in Fmr1Ko mice

...  Neural circuits of the PPC mediate complex functions related to integrating odor cues with behavior, affective states, and multisensory processing.  Relatively simple three cortical layers, convenient segregation of afferent and associative inputs, and that the understanding of the PPC microcircu ...
excitatory neurotransmitter
excitatory neurotransmitter

... preparation for storage in the brain. Glutamate stimulates the neurons to fire and create the ‘memory trace’. When the memories are retrieved, glutamate stimulates the neurons in the memory trace (neural pathway) enabling the information to be brought back to conscious ...
大腦神經解剖與建置
大腦神經解剖與建置

... Incoming information from all the senses is sorted in the thalamus 視丘 and sent to the appropriate cerebral centers for further processing. Through the hypthalamus 下視丘 control of the pituitary gland 腦下垂 體, it regulates hunger and thirst, plays a role in sexual and mating behavior, and controls the fi ...
A Brain-Based Approach to Teaching
A Brain-Based Approach to Teaching

... exposed to similar things before; so what we remember from the past has a lot to do with what we can learn in the future. If a new concept is immediately misunderstood, it will trigger some anxiety, reducing the brain’s ability to process the information due to increased secretion of certain brain c ...
Overview of the Brain
Overview of the Brain

... A stroke may occur when there is an insufficient supply of blood to a brain region, or when damage to the vasculature in a specific brain region causes bleeding into the nervous tissue. In general, there are three types of strokes that occur. They are classified based on the type of vascular defect ...
This is Your Brain. This Is How It Works.
This is Your Brain. This Is How It Works.

... The Temporal Lobes • Subdivisions cope with hearing, language, and some aspects to memory. Wernicke’s Area is critical for speech including reading. It allows us to comprehend or interpret speech and to words together correctly so they make sense. Broca’s area is behind the frontal lobes. This area ...
The Nervous System
The Nervous System

... Neurons ...
Super Brain Yoga ~ A Research Study ~
Super Brain Yoga ~ A Research Study ~

... The cerebrum, which does the functions like, thinking, learning, creativity, five senses, memory, emotion, problem solving, and decision making. The cerebellum, receives messages from most of the muscles in our body. Then it communicates with other parts of the brain and then sends messages about mo ...
Lecture Suggestions and Guidelines
Lecture Suggestions and Guidelines

... pathway returns a signal from the gray matter to the effector organ. Critical Thinking Issue(s) 1. Why does a patient often complain about pain that arises in areas of the body quite removed from the actual origin? Answer: This phenomenon is known as referred pain and is the result of specific sites ...
NEURAL REGULATION OF RESPIRATION LEARNING
NEURAL REGULATION OF RESPIRATION LEARNING

... – How brain stem regulates respiration – The other stimuli that modify the respiratory rhythm and the pathways that these signals take to the brain stem. – Voluntary control (cerebral cortex) ...
Kaan Yücel M.D., Ph.D. http://fhs122.org
Kaan Yücel M.D., Ph.D. http://fhs122.org

... the spinal cord and, through the three foramina in its roof, with the subarachnoid space. The connection between subarachnoid space & the 4th ventricle  1 hole in the middle: median aperture (of Magendi),two holes lateral apertures (of Luschka) There are two large lateral ventricles, and one is pre ...
Nervous System - Intermediate School Biology
Nervous System - Intermediate School Biology

...  Parkinson’s disease produces defects in motor behaviour. .  Patients suffering from Parkinson’s disease are missing the neurotransmitter dopamine.  Due to loss or damage of tissue in the brain which makes dopamine.  Dopamine is used to regulate the nerves controlling muscle activity.  Lack of ...
Gross Brain Overview: Part II
Gross Brain Overview: Part II

... refer to a single well-defined ridge on the surface of the brain. The distinctions between large gyri are sometimes better seen in coronal sections. ...
HBB – central nervous system Cerebral hemispheres: left and right
HBB – central nervous system Cerebral hemispheres: left and right

... Thalamus: the two egg-like structures inferior to the cerebral hemispheres and acts as a gateway to the cortex. Hypothalamus: inferior to the thalamus and controls thirst, appetite, body temperature and blood pressure. Brainstem: inferior to the diencephalon and is made up of 3 parts (midbrain, pons ...
Nervous system
Nervous system

... • The immune system, T-cells, attack a component of myelin in the central nervous system by crossing the blood-brain barrier into the CNS. •These T-cells not only injure myelin, but secrete chemicals that damage axons and recruit more damaging immune cells to the site of inflammation. • Lesions are ...
Chapter 2
Chapter 2

... During the development of the nervous system, large numbers of neurons are created, though not all of them survive. In fact, it has been estimated that between 20 per cent and 80 per cent of neurons may die in various locations in the nervous system (Toates, 2006). In order to survive, a neuron must ...
chapter48
chapter48

... The interstitial fluid surrounding the neuron is positive. An electrical potential difference exists across the membrane. It is called the resting or membrane potential. ...
Perception - Department of Psychology
Perception - Department of Psychology

... Judge other stimuli relative to standard Stevens’s power law ...
Finding Clues to Schizophrenia Outside Neurons
Finding Clues to Schizophrenia Outside Neurons

... less work has focused on determining where did the “lost” spines go? ...
Answer Key Chapter 28 - Scarsdale Public Schools
Answer Key Chapter 28 - Scarsdale Public Schools

... 12. List two types of chemical-gated ion channels that actually inhibit the initiation of an action potential in a target cell. Two types of ion channels that inhibit action potentials are channels that bring Cl− ions into the cell and channels that release K+ ions out of the cell. 13. Briefl ...
CNS imaging techniques
CNS imaging techniques

... FLAIR (Fluid attenuated inversion recovery) supresses signal of water good for finding of demyelinisated lesions in sclerosis multiplex SPIR (Spectral Presaturation by Inversion Recovery) supresses signal of fat ...
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Brain



The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. Only a few invertebrates such as sponges, jellyfish, adult sea squirts and starfish do not have a brain; diffuse or localised nerve nets are present instead. The brain is located in the head, usually close to the primary sensory organs for such senses as vision, hearing, balance, taste, and smell. The brain is the most complex organ in a vertebrate's body. In a typical human, the cerebral cortex (the largest part) is estimated to contain 15–33 billion neurons, each connected by synapses to several thousand other neurons. These neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells.Physiologically, the function of the brain is to exert centralized control over the other organs of the body. The brain acts on the rest of the body both by generating patterns of muscle activity and by driving the secretion of chemicals called hormones. This centralized control allows rapid and coordinated responses to changes in the environment. Some basic types of responsiveness such as reflexes can be mediated by the spinal cord or peripheral ganglia, but sophisticated purposeful control of behavior based on complex sensory input requires the information integrating capabilities of a centralized brain.The operations of individual brain cells are now understood in considerable detail but the way they cooperate in ensembles of millions is yet to be solved. Recent models in modern neuroscience treat the brain as a biological computer, very different in mechanism from an electronic computer, but similar in the sense that it acquires information from the surrounding world, stores it, and processes it in a variety of ways, analogous to the central processing unit (CPU) in a computer.This article compares the properties of brains across the entire range of animal species, with the greatest attention to vertebrates. It deals with the human brain insofar as it shares the properties of other brains. The ways in which the human brain differs from other brains are covered in the human brain article. Several topics that might be covered here are instead covered there because much more can be said about them in a human context. The most important is brain disease and the effects of brain damage, covered in the human brain article because the most common diseases of the human brain either do not show up in other species, or else manifest themselves in different ways.
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