Pain Flashcards Preview

Elysse NPTE NM > Pain > Flashcards

Flashcards in Pain Deck (10):
1

Pain pathway: fast, localized

Fibers: myelinated A delta fibers
Pathway: dorsal horn, lateral STT, brainstem reticular formation and thalamus. Projections to cortex (localization and discrimination of pain)

2

Pain pathway: slow

Fibers: unmyelinated C fibers
Pathway: spinal cord to anterior STT, brainstem reticular formation and thalamus. Projects to cortex. Excites Reticular Activating System - diffuse arousal for protective reactions.

3

Intrinsic inhibition: Gate control theory

Balance between large (A beta, A alpha) and small (A delta, C). Large fibers can interfere with transmission of small fibers at first synapse.

4

Intrinsic inhabitation: descending analgesics

endogenous opiates (endorphins) produced in CNS - depress pain through presynaptic inhibition.

5

When is pain categorized as chronic?

6 months - pathology no longer identifiable

6

Neurogenic Pain

Caused by a lesion in the CNS or PNS.
Central: post stroke (thalamic) pain, TBI, Fibromyalgia
Peripheral: CRPS, neuralgia, shingles

7

CRPS

Complex regional pain syndrome
Characteristics: occurs after trauma and disuse, SNS involvement, disproportional pain

8

CRPS stages

Acute: diffuse, severe burning, alloddynia, cool skin, swelling
Dystrophic/ middle: skin changes, cessation of hair and nail growth, muscle atrophy and osteoporosis
Atrophic/ late: decreased hypersensitivity, normal temperature, severe muscle atrophy, diffuse osteoporosis

9

Herpes zoster

(Shingles)
Cause: viral, inflammation of dorsal root ganglion
Characteristics: infection can last 10 days to 5 weeks, pain can last longer

10

Fibromyalgia

Etiology: nonarticular rheumatic disease, unknown origin
Characteristics: widespread pain and tissue tenderness