PS101 - ORGANIZATION OF THE NERVOUS SYSTEM - central...

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ORGANIZATION OF THE NERVOUS SYSTEM - central nervous system (CNS) – brain and spinal cord afferent = toward the CNS – feel pain, heat… efferent = away from the CNS – move your hand, turn your head - peripheral nervous system – nerves that lie outside the central nerves system somatic nervous system – voluntary muscles and sensory receptors - controlled - Peripheral nervous system – nerves that lie outside the central nervous system autonomic nervous system (ANS) – controls automatic, involuntary functions – fight or flight, impulse -sympathetic – Go (fight-or-flight) – prepares us for emergency -parasympathetic – stop – conserves energy – will take over **illustrated on pg. 91** STUDYING THE BRAIN: RESEARCH METHODS - Electroencephalography (EEG) – put sensors on your head - Damage studies/lesioning - Electrical stimulation (ESB) - Transcranial Magnetic Stimulation (TMS) – pg. 96 – stimulate parts of brain and look at what it enhances and what it refrains - Brain imaging: computerized tomography (CT) – it’s almost like you can slice the person’s brain and look at portions that have shrunk or are not receiving blood flow positron emission tomography (PET) – measuring blood flow which suggests metabolic activity. magnetic resonance imaging (MRI) – magnetic fields and rays pg. 98 **Google God helmet** - stimulates certain parts of brain and suppresses others. Almost everyone who tries this helmet on feels a religious presence
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PS101 - ORGANIZATION OF THE NERVOUS SYSTEM - central...

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