Lecture2Nerve

Lecture2Nerve - Lecture The Nervous System I. The field of...

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Lecture The Nervous System I. The field of neuroscience a. the nervous system is the body's electrochemical communication system. b. Neurons, or nerve cells, are the basic units of the nervous system c. Neuroscience is a term used to describe the multidisciplinary study of the nervous system II. Key Characteristics of the Nervous System a. Complexity: The brain is composed of billions of nerve cells b. Integration: The brain coordinates and integrates information from many sources c. Adaptability: The brain is capable of adapting to change (plasticity) d. Electrochemical Transmission: The brain is powered by both chemical (neurotransmitters) and electrical message systems. III. Pathways in the Nervous System a. Pathways are specialized to either receive or send information to or from the brain b. Sensory neurons receive incoming information from the body (afferent system) c. Motor neuron send commands from the brain to the body (efferent system) d. Neural networks integrate sensory input and motor input IV. Divisions of the Nervous System a. The two major divisions of the nervous system are the central and peripheral systems. 1. the central nervous system consists of the brain and spinal cord 2. the peripheral nervous system carries messages to and from the CNS and the organs, glands, and skeletal muscles of the body
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3. the two divisions of the peripheral nervous system are the somatic and the autonomic nervous systems. v The somatic nervous system carries sensory information to the CNS and motor information from the CNS to the skeletal muscles v The autonomic nervous system carries messages to and from the CNS to the body's organs and glands v The autonomic nervous system is divided into the sympathetic (arouses the body for fight or flight) and parasympathetic (calms the body down) nervous systems. V. Neurons a. The Neural Impulse 1. a neuron is a nerve cell-the nervous system's basic unit 2. neurons process information 3. glial cells provide support and nutritional benefit I know this may sound strange but a great website to visit to find out more about the nervous system -in many different and fun ways is
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Lecture2Nerve - Lecture The Nervous System I. The field of...

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