CVA Neurophysiology & Mechanisms of Acupuncture Action 3

Question 1

When treating a dog with chronic osteoarthritis using acupuncture, which neurophysiological mechanism is MOST important for achieving long-term pain relief beyond the treatment session?

Accepted Answer

Neuroplasticity and long-term modulation of central pain processing circuits

Answer

Acute endorphin release occurring only during needle retention time

Answer

Mechanical compression of nociceptive nerve fibers by the needle

Answer

Permanent destruction of cartilage-innervating nociceptive afferents

Question 2

Electroacupuncture (EA) at low frequency (2-4 Hz) versus high frequency (80-100 Hz) differs in its opioid peptide release profile. Which statement is correct?

Accepted Answer

Low frequency preferentially releases beta-endorphin and enkephalins; high frequency preferentially releases dynorphins

Answer

Both frequencies produce identical endogenous opioid peptide release profiles

Answer

Low frequency releases dynorphins at spinal levels; high frequency releases enkephalins

Answer

High frequency releases serotonin centrally; low frequency releases dopamine peripherally

Question 3

For a horse presenting with cervical pain, segmental acupuncture principles would direct treatment to which spinal levels?

Accepted Answer

Cervical segments C1-C8 and upper thoracic segments T1-T2

Answer

Lumbar segments L1-L5 due to referred pain patterns

Answer

Exclusively the brainstem nuclei without spinal cord involvement

Answer

Only the sacral parasympathetic outflow segments S1-S3

Question 4

'Wind-up' in the context of veterinary acupuncture treatment planning refers to:

Accepted Answer

The progressive amplification of dorsal horn neuron responses to repeated C-fiber stimulation

Answer

A manual needling technique involving rapid needle rotation to achieve De Qi

Answer

The process of wrapping copper wire around acupuncture needles before insertion

Answer

Increased sympathetic nervous system tone observed following acupuncture sessions

Question 5

Acupuncture's neurophysiological effect on myofascial trigger points is primarily explained by:

Accepted Answer

Normalization of dysfunctional motor endplate activity and dispersal of sensitizing neuropeptides at the trigger point locus

Answer

Cooling of muscle tissue through thermal conductance via the metallic needle

Answer

Permanent denervation of the affected muscle fiber groups

Answer

Direct mechanical destruction of the trigger point connective tissue

Question 6

An 'analgesic ceiling effect' sometimes encountered when treating severe chronic pain with acupuncture may be explained by which neurophysiological phenomenon?

Accepted Answer

Downregulation of opioid receptors due to prolonged exposure to high levels of endogenous opioid peptides

Answer

Physical blunting of acupuncture needle tips after multiple treatment sessions

Answer

Genetic resistance to endorphin production in certain breeds of dogs and horses

Answer

The inability of needles to penetrate deep enough in obese or large-breed animals

Question 7

In small animal patients receiving acupuncture for intervertebral disc disease (IVDD), the most clinically significant neurophysiological benefit is:

Accepted Answer

Reduction of spinal cord inflammation, promotion of neuroplasticity, and restoration of inhibitory interneuron function

Answer

Direct reabsorption of extruded nucleus pulposus material back into the disc

Answer

Increased production of cerebrospinal fluid to flush inflammatory mediators

Answer

Regrowth of severed axons within the compressed spinal cord parenchyma