Nervous System By Kellsi Rickman, Brittany Smith.

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Presentation transcript:

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. The Cerebrum controls your thoughts, imagination, perception, judgment, and decision. ( The Cerebellum controls your general movement, balance, and muscle tone. (

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

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. 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

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 dictionary.thefreedictionary.com/interneuron

Neurons Motor Neuron Sensory Neuron Interneuron

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.