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Gate Control Theory of Pain

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Questions and Answers

What primary function do large nerve fibers (Aβ) have in pain perception according to the gate control theory?

They enhance the perception of pain by facilitating small nerve fibers.

They activate inhibitory interneurons to modulate pain signals. (correct)

They travel through the spinal cord to relay sensory information only.

They transmit noxious pain signals directly to the brain.

According to the gate control theory, what happens when nonnoxious sensory input is present?

It entirely blocks all pain sensations from being transmitted.

It suppresses pain by 'closing the gate' to noxious input. (correct)

It amplifies the pain signals sent by the small nerve fibers (C).

It increases the perception of pain due to distraction.

What are the two types of fibers involved in the balance of pain perception as per the gate control theory?

Aα and Aδ fibers

Aβ and B fibers

C and D fibers

Aβ and C fibers (correct)

Which of the following best explains a practical application of the gate control theory in pain management?

<p>Applying pressure or rubbing the painful area reduces pain perception.</p> Signup and view all the answers

How does the gate control theory suggest pain transmission can be modulated?

<p>By the balance between large and small nerve fiber activity.</p> Signup and view all the answers

Study Notes

Gate Control Theory

Proposed by Wall and Melzack (1965)
Explains pain perception as a balance between large and small nerve fibers
Large nerve fibres (Aβ) carry information
Small nerve fibers (C) carry information
Collaterals of large sensory fibers (Aβ) activate inhibitory interneurons
Inhibitory interneurons modulate pain transmission through small fibers (C)
Non-noxious sensory input suppresses pain transmission
Rubbing or liniments reduce pain by increasing non-noxious sensory input, thus closing the "gate" to noxious input.

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Description

Explore the Gate Control Theory proposed by Wall and Melzack in 1965, which details how pain perception is influenced by the interaction between large and small nerve fibers. Learn how non-noxious sensory inputs can suppress pain transmissions and the role of inhibitory interneurons. This quiz will deepen your understanding of pain modulation mechanisms.