Lucy Flores, Amber Ramos, Sean Appel, Quentin Allen Nervous System.

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Presentation transcript:

Lucy Flores, Amber Ramos, Sean Appel, Quentin Allen Nervous System

The Nervous System Breakdown The nervous system controls an animals voluntary and involuntary movements. The nervous system is composed of the central nervous system (CNS) and the peripheral nervous system(PNS). The CNS contain the brain and spinal chord. The PNS consists mainly of nerves, which are long fibers that connects the CNS to every other body part.

PNS Composed of the autonomic nervous system (ANS), and the somatic nervous system (SNS). In the ANS you can find the sympathetic (which prepared your body for fight or flight) and the parasympathetic nervous system (which calms your body after fight or flight). The SNS controls reflexes like blinking, balance, and the stretch reflex. It is responsible for muscle contractions and voluntary movement.

CNS Integrates the information that it receives from and coordinates the activity of all body parts of the bilaterian animals(multicellular animals), except for radially symmetric animals. Brain in cranial cavity, protected by skull Spinal cord in spinal cavity, protected by vertebrae

Neurons Specialized to transmit information throughout the body. Responsible for communicating information in both chemical and electrical forms Motor neurons transmit information from the brain to muscles in the body. Sensory neurons carry information from the sensory receptor cells throughout the body to the brain. Interneurons are responsible for communicating information between different neurons in the body.

How neurons look

Myelin (Sheath) Found around the axon of a neuron. Essential for proper functioning. Myelination= production of myelin sheath The purpose is to increase the speed at which impulses are sent along the myelinated fiber.

Brain

What does the brain do? Most complex organ Exert centralized control over the other organs of the body Right side of the brain controls the left side of the body and vice versa Frontal lobe, parietal lobe, occipital lobe, temporal lobe

Diseases Demyelination: loss of myelin sheath insulating the nerves. Alzheimers :loss of memory Broca Aphasia: disturbance of comprehension and formulation of language Huntingtons Disease : affects muscle coordination. Cognitive decline.