Chapter2NervousSystem

Chapter2NervousSystem - The Nervous System Major division -...

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The Nervous System Major division - Central vs. Peripheral Central or CNS- brain and spinal cord Peripheral- nerves connecting CNS to muscles and organs Central Nervous System Peripheral Nervous System
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Peripheral Nervous System 3 kinds of neurons connect CNS to the body sensory motor interneurons Motor - CNS to muscles and organs Sensory - sensory receptors to CNS Interneurons: Connections Within CNS Spinal Cord Brain Nerves
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Peripheral Nervous System Skeletal (Somatic) Sympathetic Parasympathetic Autonomic Peripheral Nervous System
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Somatic System Nerves to/from spinal cord control muscle movements somatosensory inputs Both Voluntary and reflex movements Skeletal Reflexes simplest is spinal reflex arc Muscle Motor Neuron Interneuron Skin receptors Sensory Neuron Brain
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Autonomic System Two divisions: sympathetic Parasympatheitic Control involuntary functions heartbeat blood pressure respiration perspiration digestion Can be influenced by thought and emotion
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Sympathetic “ Fight or flight” response Release adrenaline and noradrenaline Increases heart rate and blood pressure Increases blood flow to skeletal muscles Inhibits digestive functions CENTRAL NERVOUS SYSTEM Brain Spinal cord SYMPATHETIC Dilates pupil Stimulates salivation Relaxes bronchi Accelerates heartbeat Inhibits activity Stimulates glucose Secretion of adrenaline, nonadrenaline Relaxes bladder Stimulates ejaculation in male Sympathetic ganglia Salivary glands Lungs Heart Stomach Pancrea s Liver Adrenal gland Kidney
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This note was uploaded on 02/14/2010 for the course PSY 101 taught by Professor Jackson during the Spring '08 term at Michigan State University.

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Chapter2NervousSystem - The Nervous System Major division -...

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