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Unformatted text preview: THE BRAIN IN TWO PARTS: HOW IT WORKS AND WHAT IT DOES The Nervous System: The electrochemical communication system Divided in to 2 parts: The central nervous system and the peripheral nervous system 1. The Central Nervous System: o Made up of the brain and spinal cord o 99% of neurons located in the Central Nervous System o Functions include: Receiving income information Processing and storing incoming information Sending out information to muscles, glands, and internal organs o The Central Command System which controls thoughts and movement 2. Peripheral Nervous System: o Nervous System outside the brain and spinal cord which handles input and output of the Central Nervous System o Connects the brain and the spinal cord to the other areas of the body Neurons: Individual cells which receive, integrate, and transmit information Sensory or Afferent Neurons: o Carry information to the brain from the skin, muscles, or organs Ex. You put your hand on hot stove, the sensory neurons tell your brain it is hot and tells you to remove your hand Motor or Efferent Neurons: o Carry the brains output to muscles, glands and organs Ex. Get that motor activity and lift your hand up tells you to move your hand Interneurons: o Central Nervous System neurons that mediate sensory input and motor output. The traffic cop Mirror Neurons: o Neurons which are activated by performing an action or by seeing another perform the same action May play a role in developing new motor skills Empathy and language (partly based on imitation) Dysfunction linked to autistic spectrum disorder-helping with autistic kids with video games Fire when engage in physical activity, think to move, or watch someone else move How it all works: Neurons in Action: Neurons are the nerve cells which communicate to, from, or inside the Central Nervous System Glial cells: (glue) Hold neurons in place, nourish and insulate neurons. Non-neuron cells which provide a supportive function (neuron function) keeps things together Structure of a Neuron...
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- Winter '08