Podcast
Questions and Answers
Which branch of the autonomic nervous system primarily innervates the eccrine sweat glands involved in the galvanic skin response (GSR)?
Which branch of the autonomic nervous system primarily innervates the eccrine sweat glands involved in the galvanic skin response (GSR)?
- Sympathetic branch (correct)
- Somatic nervous system
- Parasympathetic branch
- Central nervous system
Increased sympathetic nervous system activity typically leads to an increase in skin temperature due to enhanced peripheral circulation.
Increased sympathetic nervous system activity typically leads to an increase in skin temperature due to enhanced peripheral circulation.
False (B)
What unit of measurement is typically used to express skin conductance in psychophysiological studies?
What unit of measurement is typically used to express skin conductance in psychophysiological studies?
microsiemens
During a GSR, as eccrine sweat glands fill with fluid, skin ________ decreases.
During a GSR, as eccrine sweat glands fill with fluid, skin ________ decreases.
Match the physiological response with the corresponding autonomic nervous system activity:
Match the physiological response with the corresponding autonomic nervous system activity:
Which of the following physiological parameters is NOT directly measured to assess autonomic nervous system activity in the described experiments?
Which of the following physiological parameters is NOT directly measured to assess autonomic nervous system activity in the described experiments?
Conscious control can directly influence the galvanic skin response (GSR).
Conscious control can directly influence the galvanic skin response (GSR).
What physiological mechanism explains why stress responses typically lead to a decrease in skin temperature?
What physiological mechanism explains why stress responses typically lead to a decrease in skin temperature?
Norepinephrine, released by sympathetic nerve fibers, causes pulse rate to ________.
Norepinephrine, released by sympathetic nerve fibers, causes pulse rate to ________.
Which of the following factors does NOT directly influence absolute skin temperature among individuals?
Which of the following factors does NOT directly influence absolute skin temperature among individuals?
Flashcards
Psychophysiology
Psychophysiology
The study of physiological responses to behavioral stimuli.
Galvanic Skin Response (GSR)
Galvanic Skin Response (GSR)
Electrical activity of the skin, reflecting sweat gland activity controlled by the autonomic nervous system.
Eccrine Sweat Glands
Eccrine Sweat Glands
Sweat glands on palms and feet, innervated by the sympathetic nervous system, that act as variable resistors.
Skin Conductance
Skin Conductance
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Skin Temperature
Skin Temperature
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Pulse Rate
Pulse Rate
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Sympathetic Nervous System
Sympathetic Nervous System
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Parasympathetic Nervous System
Parasympathetic Nervous System
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Study Notes
- Psychophysiology studies physiological responses to behavioral stimuli.
- Common physiological parameters measured include:
- Electrodermal activity (Galvanic Skin Response, GSR)
- Heart rate
- Skin temperature
- Respiration rate
- These variables respond to signals from the autonomic nervous system, which isn't consciously controlled.
Galvanic Skin Response (GSR)
- Eccrine sweat glands on palms and soles are innervated by the sympathetic nervous system.
- These glands act as variable resistors; when filled with fluid, skin resistance decreases.
- Sympathetic activity increases sweat production, increasing skin conductance.
- Skin conductance is measured in microsiemens (μS).
Skin Temperature
- Microvasculature circulation is under autonomic control, regulating temperature and oxygen supply.
- Absolute skin temperatures vary among individuals due to metabolism, cutaneous fat, and health.
- Changes in emotional state can alter skin temperature.
- Sympathetic nervous system activation from stress reduces peripheral circulation, lowering skin temperature.
- Parasympathetic nervous system signals can increase peripheral circulation, causing blushing.
Pulse Rate
- Pulse rate is controlled by the autonomic nervous system.
- Norepinephrine release from sympathetic nerve fibers increases pulse.
- Stress responses typically increase peripheral pulse rate.
Experiments
- Experiments will measure changes in skin conductance, skin temperature, and peripheral pulse rate in response to various stimuli.
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