PSYB30H3 Lecture Notes - Magnetic Resonance Imaging, Central Nervous System, Sympathetic Nervous System

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Published on 21 Apr 2013
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Department
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7 - Neuroscience and Personality [other biological theories]
Relationship of personality and changes in:
bodily responses
brain structures
brain activity
biochemical activity
Major divisions of the Nervous System:
Central Nervous System (CNS)
o Brain
o Spinal cord
Peripheral Nervous System (PNS)
o Somatic nervous system
Afferent nerves
Efferent nerves
o Autonomic nervous system
Sympathetic division
Parasympathetic division
Sympathetic nervous system
“fight-or-flight” system
Non-essential activities are dampened (GI/urinary)
o Heart rate increases supply muscles with oxygen so that they can work better
o Breathing is rapid and deep increase oxygen supply to the blood
o Skin is cold and sweaty
o Pupils dilate
o Blood diverted to skeletal muscles
o Liver releases more glucose into blood
Parasympathetic is opposite
Bodily Responses: Measuring ANS activity
Heart rate
Body temp and blood flow
Skin conductance (GSR galvanic skin response)
Electromyography (EMG) measure non-visible muscle movement
Brain Structure - Measures
Static differences in relative size and weight and cell numbers of brain parts
Computerized tomography (CT) scan
Magnetic resonance imaging (MRI)
Brain Activity Measures
Cortical stimulation
EEG electric activity at different parts of the bran
PET low radioactive glucose solution … then scan to see which areas use glucose most
fMRI measures oxygen's magnetic properties to see which areas are active
TMS electrode stimulated a selected area of the brain and disturbs that area
Biochemical Activity
Neurotransmitters: chemicals released by neurons to excite next neuron into action, or inhibit it
o Dopamine: pleasure, movement, learning, rewards
o Serotonin: mood regulation and arousal, control of sleeping and eating
Low = linked to depression
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Document Summary

7 - neuroscience and personality [other biological theories] Central nervous system (cns: brain, spinal cord. Peripheral nervous system (pns: somatic nervous system. Skin conductance (gsr galvanic skin response) Electromyography (emg) measure non-visible muscle movement. Static differences in relative size and weight and cell numbers of brain parts. Eeg electric activity at different parts of the bran. Pet low radioactive glucose solution then scan to see which areas use glucose most fmri measures oxygen"s magnetic properties to see which areas are active. Tms electrode stimulated a selected area of the brain and disturbs that area. Neurotransmitters: chemicals released by neurons to excite next neuron into action, or inhibit it: dopamine: pleasure, movement, learning, rewards, serotonin: mood regulation and arousal, control of sleeping and eating. Low = linked to depression: norepinephrine and epinephrine are also considered stress hormones increase blood flow to muscles by increasing heart rate and blood pressure.

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