SCS Module Flashcards
nonpainful input closes “gates” to painful input, which prevents painful sensation from traveling to the CNS stimulation by non-noxious input can suppress pain (hitting your funny bone = rubbing your elbow, prioritize the non-painful stimulation over the painful one)
Gate Control Theory
- Develops in response to specific situation
- Caused by injury to body tissues
- Most common pain
- Receptive to opioids
Nociceptive
- Damage to the nervous system/nerves
- Less predictable, does not develop in response to any specific circumstance or stimulus
- aka Neuralgia
Neuropathic
- Rapid onset pain
- Obvious cause
- Transient, intermittent, or persistent
- Pain will end
Acute
- Persistent pain
- Without any physical basis
- No protective function
- Extends beyond period of healing
- Dx after 3-6 months of pain
- May spread and increase in intensity
Chronic
Three major complications of persistent pain
- Deconditioning
- Hormonal
- Neuropsychiatric
how much you can take before a sensation is painful
pain threshold
amount of pain a person is willing or able to tolerate
pain tolerance
processes the physical reaction to the painful stimulus
somatosensory cortex
accounts for the unpleastness of the pain
limbic system
receive signals from other nerve cells and send electrical stimulation to the soma
dendrites
brain of the neuron, where the signal is generated or processed
soma
controls firing of neuron/action potential (where the signal originates)
axon hillock
transmits the signal (anatomy of a neuron)
axon
the larger the axon, the __ transmission of information
faster
coats the axon - acts as an insulator and increases speed conduction dramatically
myelin
the dorsal column system is made up of ___, ____ fibers
large, myelinated
three types of neurons
- motor (efferent)
- interneuron
- sensory (afferent)
the smaller the nerve fiber, the ___ communication because of less myelin present
slower
the larger the nerve fiber, the ___ energy needed to generate action potential
less
less myelin, smaller nerve, more energy required to generate action potential = ___ threshold
greater
more myelin, larger nerve, less energy required to generate action potential = ___ threshold
lower
back, or posterior portion of the body
dorsal
front, or anterior portion of the body
ventral
all DRG or SCS leads are ___ positioning
dorsal
how many segments of cervical spine
7
how many segments of thoracic spine
12
how many segments of lumbar spine
5
how many segments of sacrum/iliac crest
4-5
