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neurons and the nervous system
neurons and the nervous system

...  Made up of a cell body and branches called dendrites ...
TSM3 - Development of the CNS and PNS
TSM3 - Development of the CNS and PNS

... A subsequent infolding of the plate gives rise to the neural groove and bilateral neural crests which propagate into the mesoderm The folds in the neural plate fuse together to form the neural tube which is contained within the mesoderm and fully formed by the fourth week of development The neural t ...
Autism And Mirror Neurons
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Nervous System Part Five
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The Central Nervous System
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Problems of the Nervous System
Problems of the Nervous System

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Slide 1

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Biology and behavior

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Continuing Education Independent Study Series

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Gross anatomy, and terms for directions and sections

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The Nervous System

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... brain regions, each having their own task or function, interact through thousands of structural connections, continuously processing, sharing, and integrating information. Driven by advances in neuroimaging techniques and mathematics, it has now become increasingly feasible to examine large scale br ...
IT`S ALL IN YOUR MIND - Teacher Enrichment Initiatives
IT`S ALL IN YOUR MIND - Teacher Enrichment Initiatives

... of these smaller lobes has a specific job to help the body and brain communicate. The frontal lobes think and create (#1). The parietal lobes (#4) help us with directions and to recognize objects and their uses. At the back of the head are the occipital lobes (#5) where messages from the eyes are re ...
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... MID BRAIN – DORSAL SURFACE  Marked by 4 elevations: 1. Two superior colliculi: concerned with visual reflexes. 2. Two inferior colliculi: forms part of auditory pathway.  Nerve emerging from Midbrain (one): • Trochlear (4th): just caudal to inferior colliculus (The only cranial nerve emerging fro ...
HEAD , FACIAL BONES, SINUSES, AND ORBITS
HEAD , FACIAL BONES, SINUSES, AND ORBITS

... Astrocytomas are glial cell tumors that are derived from connective tissue cells called astrocytes. These cells can be found anywhere in the brain or spinal cord. Astrocytomas are the most common type of childhood brain tumor. ...
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Module 3 Brain`s Building Blocks

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Your Brain
Your Brain

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The Nervous System - McGraw Hill Higher Education
The Nervous System - McGraw Hill Higher Education

... Disorders of the nervous system are numerous and often very difficult to diagnose and treat because of the complexity of this system. ...
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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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