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Biology & Behavior. The NERVOUS SYSTEM  What is its function? –Involved in thinking –Involved in dreaming –Involved in feeling –Involved in moving –Involved.

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Presentation on theme: "Biology & Behavior. The NERVOUS SYSTEM  What is its function? –Involved in thinking –Involved in dreaming –Involved in feeling –Involved in moving –Involved."— Presentation transcript:

1 Biology & Behavior

2 The NERVOUS SYSTEM  What is its function? –Involved in thinking –Involved in dreaming –Involved in feeling –Involved in moving –Involved in reactions –Involved in learning –Involved in memory

3 Nervous System Overview  CIPA: Feeling no pain? –http://www.youtube.com/watch?v=ths2 RJRenvI http://www.youtube.com/watch?v=ths2 RJRenvIhttp://www.youtube.com/watch?v=ths2 RJRenvI –http://www.youtube.com/user/HelpRob erto  How do neurons work? –http://www.youtube.com/watch?v=FZ5 dD2TtfXw http://www.youtube.com/watch?v=FZ5 dD2TtfXwhttp://www.youtube.com/watch?v=FZ5 dD2TtfXw –http://www.youtube.com/watch?v=Li5n MsXg1Lk&feature=related

4 TWO PARTS of NERVOUS SYSTEM (see transparency)  CENTRAL nervous system  PERIPHERAL nervous system  Made up of nerve cells that send messages between the CNS and parts of the body.

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7 OUCH! THAT’S ONE HOT STOVE!!! How do messages get sent from one part of the body to another?

8 VIA the Telephone

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10 How do neurons work?  http://www.youtube.com/watch?v=ys DGX6bOgAw

11 COMMUNICATION  Messages are sent and received through NEURONS (see transparency) and received through NEURONS (see transparency)  Messages are sent from the AXON terminals of one neuron to the DENDRITE of the other neuron

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13 COMMUNICATION  Message must cross the SYNAPSE junction of neuron “a” to reach the dendrites of neuron “b” (see transparency)

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16 COMMUNICATION  Messages is sent across the synapse through NEUROTRANSMITTERS or chemical messengers who carry impulses

17 NEURO- WHAT!?  Much like drops of water shooting out of a spray bottle, they fire messages hundreds of times a second.  Presence of too many or too little neurotransmitters result in disease and psychological disorders.

18 Famous Neuro- “T”s  Acetylcholine: muscle control, when low our memories are impaired.  Dopamine: motor behavior, when low often diagnosed with Parkinson’s Disease, when high often schizophrenic

19 Famous Neuro- “T”s  Serotonin: emotional arousal and sleep, when unequal level may result in OCD, Depression.  Noradrenalin: prepares body for action

20 FAST FACTS:  Dendrites always receive messages  Axon always carries messages away

21 How fast are neurons? (experiment)

22 NERVOUS SYSTEM CNS PNS Autonomic System Somatic System Para- sympathetic System Sympathetic System

23 Central Nervous System  Spinal Cord extends from the brain down the back  A column of nerves as thick as your thumb and is protected by bones in your spine.

24  Transmits messages between the brain, muscles and glands.  Spinal reflexes- automatic response

25 Peripheral Nervous System  Lies outside the CNS and is responsible for transmitting messages between the CNS and body parts.  2 parts

26 Somatic Nervous System  Activated by touch, pain, temperature changes, body position changes (enables us to maintain posture and balance).  Transmits sensory messages

27 Autonomic Nervous System  Automatically or “occurring involuntarily”  Regulates body’s vital functions: –Heartbeat, Breathing, Digestion, Blood Pressure

28  Psychologists are interested in ANS b/c of its involvement in emotion  2 parts

29 Autonomic System Parasympathetic System Sympathetic System

30  Prepares the body for action  “Fight-or-Flight”  Suppresses digestion, increases heart rate, elevates blood pressure

31 Fight or Flight  http://www.youtube.com/watch?v=X 6UknGo_KPU

32 Parasympathetic System  Calms the body after emergencies  Normalizes heart rate and blood pressure, breathing  PEACE

33 Hind and midbrain

34 forebrain

35 Limbic system


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