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Psychology 3.2 Organization of the Nervous System Flashcards

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From Psychology Themes & Variations Briefer Version 9th Edition by Wayne Weiten

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917020380Peripheral Nervous Systemmade up of all nerves that lie outside brain and spinal cord (PNS0
917020381Nervesbundles of neuron fibers (axons) that are routed together in the peripheral nervous system1
917020382Somatic Nervous Systemnerves that connect to voluntary skeletal muscles and to sensory receptors2
917020383Afferent Nerve Fiberaxons that carry information inward to the central system from the PNS3
917020384Efferent nerve fiberaxons that carry information outward from the CNS to the PNS4
917020385Autonomatic Nervous Systemnerves that connect to the heart, blood vessels, smooth muscles and glands (ANS)5
917020386Sympathetic divisionbranch of the ANS that mobilizes the body's resources for emergencies6
917020387Parasympathetic Nervous Systembranch of ANS that conserves bodily resources7
917020388Central Nervous Systemconsists of brain and spinal cord8
917020389What protects the Central Nervous SystemBone: Spine and Skull Cerebrospinal Fluid (supports and cushions brain and spinal cord) Blood Brain Barrier (selectively permeable, keeps toxins from entering brain)9
917020390Spinal CordTransmit somatosensory information to brain, distribute motor fibers, some reflexes (Withdrawal reflex)10
917020391Magnetic Resonance Imaging (MRI)Measure of waves emitted by H+ atoms when activated by magnetic field, High spatial resolution, Better 3D images than CT scan Examine abnormalities in brain structure11
917020392Positron Emission TechnologyImages of Brain Activity, Injection of radioactive dye that helps to measure glucose metabolism12
917020393Functional Magnetic Resonance Imaging (fMRI)Images of brain activity Measures Oxygen flow No injection needed 3D brain activity More precise than PET scan Predominant brain recording technique in cognitive neuroscience13
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