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Nervous System

Nervous System. By Kellsi Rickman, Brittany Smith. Central Nervous System (Brain). Consists of Brain and Spinal Cord The brain controls your awareness, movements, sensations, thoughts, speech, and memory.

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Nervous System

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  1. Nervous System By Kellsi Rickman, Brittany Smith

  2. Central Nervous System (Brain) • Consists of Brain and Spinal Cord • The brain controls your awareness, movements, sensations, thoughts, speech, and memory. • The Cerebrum controls your thoughts, imagination, perception, judgment, and decision. (http://webspace.ship.edu/cgboer/genpsycerebrum.html) • The Cerebellum controls your general movement, balance, and muscle tone. (http://www.neuroskills.com/tbi/bcerebel.shtml)

  3. Central Nervous System (Spinal Cord) • The spinal cord is connected to a section of the brain called the brainstem and runs through the spinal canal. • Cranial Nerves exit the brainstem. • Nerve roots exit the spinal cord through both parts of the body. • Carries signals back and forth through the brain and the peripheral nerves. • There are 31 pairs of spinal nerves along the spinal cord

  4. Peripheral Nervous System • Two types of cells in the peripheral system. • cells carry information to sensory nervous cells and from motor nervous cells the central nervous system. http://biology.about.com/od/organsystems/a/aa061804a.htm • MNS cells carry info from the CNS to organ, muscles, and glands. • MNS divided into Somatic and Autonomic nervous system. • SNS controls skeletal muscle and skin. • ANS controls involuntary muscle such as smooth and cardiac muscles

  5. PNS Continued.. • Sensory Nervous System - sends information to the CNS from internal organs or from external stimuli. • Motor Nervous System - carries information from the CNS to organs, muscles, and glands. • Somatic Nervous System - controls skeletal muscle as well as external sensory organs. • Autonomic Nervous System - controls involuntary muscles, such as smooth and cardiac muscle. • Sympathetic - controls activities that increase energy expenditures. • Parasympathetic - controls activities that conserve energy expenditures. • Interneuron- a neuron between the primary afferent neuron and the final motor neuron motorneuron. Also any neuron whose processes lie entirely within a specific area, such as the olfactory lobe • http://medical-dictionary.thefreedictionary.com/interneuron

  6. Neurons Motor Neuron Sensory Neuron Interneuron

  7. Cranial & Spinal Nerves • There are 12 Cranial Nerves… Cranial nerve XII: Hypoglossal nerve The hypoglossal nerve provides somatic motor innervation to the muscles of the tongue.

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