PAIN Flashcards
types of peripheral nociceptors?
cutaneous
deep somatic
deep visceral
type of cutaneous peripheral nociceptors?
respond to severe mechanical deformation, info transmitted by Ad fibers, and frequency of stimulation determines intensity of sensation; stimulation leads to localized pain
high threshold mechanoreceptors
type of cutaneous peripheral nociceptors?
respond to temperature, also Ad
mechanothermal receptors
type of cutaneous peripheral nociceptors?
respond to deformation, chemical, or
thermal stimulation, are C fibers, lead to dull, burning pain
polymodal receptors
In muscle, tendons, joints, periosteum, cover both types of fibers, pain is not well localized and is more dull/aching
what is this peripheral nociceptor?
Deep somatic
Free nerve endings leading to C fibers, with dull/aching pain related to nearby somatic structure (referred pain)
what is this peripheral nociceptor?
Deep visceral
what are the entrapment mono neuropathies?
Peroneal neuropathy at the fibular head
Tarsal tunnel syndrome: Entrapment of the posterior tibial nerve at the medial malleolus
Sciatic mononeuropathy
Median mononeuropathy at wrist (carpal tunnel) or at elbow
Ulnar mononeuropathy at elbow or in forearm
what is this leg/back pain?
– Usually occurs with compressive lesions such as tumors, hematomas
– Symptoms depend on which fibers are involved
Lumbosacral plexopathy
what is this leg/back pain?
– From strain, bone spurs (spondylosis), or disc rupture
– Pain is in dermatomal distribution
Lumbar radiculopathy
what is this arm/neck pain?
- Pain and tingling paresthesias on the dorsum of the hand
- Weakness in the wrist and finger extensors
Radial mononeuropathy
what is this arm/neck pain?
Symptoms vary by part of plexus injured
Brachial plexopathy
what is this arm/neck pain?
Pathology similar to lumbar radiculopathy
Cervical radiculopathy
what is this arm/neck pain?
– Tumors
– Spinal abscess
Spinal cord processes
types of facial pain?
trigeminal neuralgia
high cervical radiculopathy
occipital neuralgia
what is this type of CRPS?
– Appears weeks to months after injury
– Can occur after minor trauma; no precipitant is found in up to 25% of cases
– Treated by regional sympathetic blockade, though this treatment is now
controversial
CRPS I=RSD, regional sympathetic dystrophy
