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Questions and Answers
Where do the endings of the small peripheral nerve fibers detect a stimulus?
Where do the endings of the small peripheral nerve fibers detect a stimulus?
- Hypothalamus
- Cortex of the brain
- Muscles in the body
- Dorsal horn of the spinal cord (correct)
What is the role of the substantia gelatinosa in the pain pathway?
What is the role of the substantia gelatinosa in the pain pathway?
- Transmitting impulses to the brain
- Halting impulses at the level of the spinal cord
- Interfacing network of cells in the spinal cord (correct)
- Returning transmission to the peripheral site
How can a woman experience less pain during labor?
How can a woman experience less pain during labor?
- By lying flat on her back
- By tensing her abdomen during contractions
- By holding her breath during contractions
- By relaxing her abdomen and allowing the uterus to rise freely (correct)
What is the principle behind the gating control theory of pain perception?
What is the principle behind the gating control theory of pain perception?
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What is the purpose of gate control mechanisms in pain management?
What is the purpose of gate control mechanisms in pain management?
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Study Notes
Pain Perception and Mechanisms
- Endings of small peripheral nerve fibers, such as C fibers, detect stimuli in skin and deeper tissues, registering sensations like pain and temperature.
- The substantia gelatinosa, located in the spinal cord, plays a crucial role by modulating pain signals between peripheral nerve fibers and the brain, influencing the pain perception process.
Pain Management During Labor
- Women may experience less pain during labor through methods such as epidurals, breathing techniques, and relaxation exercises, which alter pain signaling and enhance coping mechanisms.
Gating Control Theory of Pain
- The gating control theory postulates that non-painful stimuli can inhibit the transmission of painful stimuli through neural gates in the spinal cord, thus reducing pain perception.
- This theory explains why rubbing an injured area can temporarily alleviate pain; it activates larger and faster nerve fibers that compete with pain signals for transmission to the brain.
Purpose of Gate Control Mechanisms
- Gate control mechanisms serve to modulate pain intensity and perception, allowing the body to filter out unnecessary pain responses while amplifying signals that require attention, promoting adaptive pain responses.
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