Lecture 3 Brain Part 1

Lecture 3 Brain Part 1 - The Nervous System The Body’s...

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Unformatted text preview: The Nervous System The Body’s electrochemical communication system Divided into two parts: The Central Nervous System and the Peripheral Nervous System The Central Nervous System Made up of: brain and spinal cord 99 % neurons located in CNS Functions include: receiving, processing and storing incoming information; sends out messages to muscles, glands and internal organs The central command system which controls thought and movement 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 Neurons Individual Cells which receive, integrate and transmit information Sensory or Afferent Neurons (affect [feeling neurons]): carrying information to the brain from the skin, muscles or organs Motor or Efferent Neurons: carry the brains output to muscles, glands and organs Touch stove feels hot (afferent), move away (efferent) Mirror Neurons: 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 (see something and imitate it) Empathy and language ( partly based on imitation) Dysfunction link to autistic spectrum disorders 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-neurons cells which provide a supportive function The Structure of A Neuron Dendrites: receive messages from other neurons, transmit to the cell body Cell body/soma: keep neurons alive; contains substances for growth, determines whether to fire Axons: transmit messages away from the cell body to other neurons, muscles or glands...
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This note was uploaded on 01/27/2012 for the course PSYCH 111 taught by Professor Schreier during the Fall '08 term at University of Michigan.

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Lecture 3 Brain Part 1 - The Nervous System The Body’s...

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