Psychology 3.2 Organization of the Nervous System Flashcards

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

917020380	Peripheral Nervous System	made up of all nerves that lie outside brain and spinal cord (PNS	0
917020381	Nerves	bundles of neuron fibers (axons) that are routed together in the peripheral nervous system	1
917020382	Somatic Nervous System	nerves that connect to voluntary skeletal muscles and to sensory receptors	2
917020383	Afferent Nerve Fiber	axons that carry information inward to the central system from the PNS	3
917020384	Efferent nerve fiber	axons that carry information outward from the CNS to the PNS	4
917020385	Autonomatic Nervous System	nerves that connect to the heart, blood vessels, smooth muscles and glands (ANS)	5
917020386	Sympathetic division	branch of the ANS that mobilizes the body's resources for emergencies	6
917020387	Parasympathetic Nervous System	branch of ANS that conserves bodily resources	7
917020388	Central Nervous System	consists of brain and spinal cord	8
917020389	What protects the Central Nervous System	Bone: Spine and Skull Cerebrospinal Fluid (supports and cushions brain and spinal cord) Blood Brain Barrier (selectively permeable, keeps toxins from entering brain)	9
917020390	Spinal Cord	Transmit somatosensory information to brain, distribute motor fibers, some reflexes (Withdrawal reflex)	10
917020391	Magnetic 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 structure	11
917020392	Positron Emission Technology	Images of Brain Activity, Injection of radioactive dye that helps to measure glucose metabolism	12
917020393	Functional 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 neuroscience	13