3. The Brain Part One

3. The Brain Part One - The Brain in Two Parts: How it...

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The Brain in Two Parts: How it Works and What it Does
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The Nervous System The Body’s electrochemical communication system Divided into two parts: The Central Nervous System and the Peripheral Nervous System
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The Central Nervous System Made up of: brain and spinal cord 99 % of neurons are located in the CNS Functions include: receiving, processing, storing incoming information; sends out messages to muscles, glands, and internal organs The central command system that controls thought and movement
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The Peripheral Nervous System Nervous system outside the brain and spinal cord which handles input and output of the CNS Connects the brain and spinal cord to the other areas of the body
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Neurons Individual Cells which receive, integrate and transmit information Sensory neurons: carry information to the brain from the skin, muscles, organs Motor neurons: output signals to the muscles, organs from the brain Sensory or Afferent Neurons: carry information to the brain from the skin, muscles or organs Motor or Efferent Neurons: output signals to the muscles, organs from the brain
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Mirror Neurons: neurons that 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 (party based on imitation) - Dysfunction linked to autistic spectrum disorders
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How it All Works: Neurons in Action Neurons are the nerve cells which communicate to, from or inside the CNS Glial cells: hold the neurons in place, nourish and insulate neurons. Non-neuron cells that provide a supportive function
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Dendrites: receive messages from other neurons, transmit to the cell body (branches) Cell body/soma: keep neurons alive; contains substances for growth, determines whether to fire
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This note was uploaded on 01/04/2012 for the course PSYCH 111 taught by Professor Schreier during the Fall '08 term at University of Michigan.

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3. The Brain Part One - The Brain in Two Parts: How it...

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