Page 8 - Biofreeze Massage Manual

Introduction
What is Gate Control?
The Gate Control theory is based on the understanding that pain is transmitted by two kinds of a erent nerve bers.
1. A larger myelinated A-delta ber, which carries quick, intense-pain messages.
2. A smaller, unmyelinated “C” ber, which transmits throbbing, chronic pain.
A third type of nerve ber, called A-beta, is “nonnociceptive,” meaning it does not transmit pain stimuli. The gate control theory asserts that signals transmitted by the A-delta and C pain bers can be thwarted by the activation / stimulation of the nonnociceptive A-beta bers and inhibit an individual’s perception of pain.
The Melzack-Wall Pain Gate
The brain’s perception of pain depends on the interaction—within the laminae of the spinal cord—of C and A-delta nerve bers (pain-transmitting) with A-beta nerve bers (non-
pain transmitting). Stimulating the A-beta nerve bers ultimately activates the inhibitory interneuron and “closes the gate” to pain.
Apply Biofreeze to painful area
pain
(throbbing, chronic pain)
Pain is NOT Perceived
a-delta nerve ber
(quick, intense pain)
8 Massage therapy treatment Manual
pain
The Melzack-Wall Pain Gate
Pain Signal
Laminae
C bers
spinal cord
a-beta nerve ber
inhibitory neuron
Not Activated
Brain
Pain Signal
Laminae
C bers
spinal cord
(no signal to the brain)
a-beta nerve ber
inhibitory neuron
Activated via counter irritant stimulation
Brain
Pain is Perceived
a-delta nerve ber
(quick, intense pain)
(throbbing, chronic pain)