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12 Cards in this Set
- Front
- Back
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According to Herzog, what are the three phases of a force/time profile of a manual chiropractic adjustment?
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1. preload phase_
2. thrust phase_ 3. resolution phase |
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How long is the thrust phase of a typical force/time profile of a manual chiropractic adjustment?
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100 - 200 msec
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What are the three types of measurable responses that are elicited by chiropractic adjustments?
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1. mechanical responses_
2. neuromuscular reflex responses_ 3. physiologic responses |
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What kinds of movements of a vertebral segment are typically caused by a manual adjustment?
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1. rotation in a transverse plane
2. rotation in a sagittal plane |
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Are the neuromuscular reflex responses elicited by manual adjustments inhibitory or excitatory?
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They can be either
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Do all receptors affected by an adjustment typically respond at pretty much the same time relative to the force/time profile?
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No. Some occur early in the profile and some occur later on.
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Generally speaking, how long is the delay between the beginning of the force/time profile of a manual adjustment and the EMG response to it?
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typically between 50 and 200 msec
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How long does the EMG response to a manual adjustment usually last?
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from 100 - 400 msec
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How does the measureable response of a manual adjustment compare to that of an instrumented (Activator-like) adjustment?
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A manual adjustment usually elicits both cavitation and an EMG response._
An instrumented adjustment does not typically elicit cavitation and little or no EMG response. |
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Are large decreases of EMG activity levels seen right after a chiropractic treatment?
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Yes, but not usually.
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What is currently thought to be the cause of the audible release, or "crack", often heard in connection with a manual adjustment?
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The formation of gas bubbles in the synovial fluid of the facet joints (cavitation) or_
Possibly the snapping of the capsular ligament that occurs as the joint is rapidly stretched out. |
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If a chiropractic does not perceive an audible release when delivering a manual adjustment, a second thrust is often made. In that case, how does the second thrust compare to the first?
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The second thrust usually has a higher peak force and_
a higher rate of force application._ An audible release is often heard in connection with the second thrust. |
