Card Set Information
What is the
Direct connection from SC to thalamus
What is the
Indirect connection from SC to thalamic nucleus
**poorly localized pain
**emotion, feelings, etc...tied to pain
sensation without stimulus
abnormal sensation (pain, prick, burn, tickle...)
Diminished sense of pain
Pain from extreme innocuous sensation (e.g. sunburn from >45C temp or cold from <17C temp)
What type of free nerve endings are within the ALS?
pinch, rub, stretch, scratch, etc...
What type of peripheral nerves are in the ALS?
A-delta and C-fibers (since all of nociceptor origin)
How many A-delta fiber spots in the peripheral ALS neurons?
2-30 (micrometer diameter)
How many C-fiber spots in the peripheral ALS neurons?
1-2 (mm diameter)
What part of the SC do the central nerves travel through?
What do the descending branches participate in?
Where do the ascending branches synapse?
What lamina contains the majority of A-delta and C-fibers?
: Lamina I
: Lamina V
List the pathway of pain inhibition for the ALS?
Periaqueductal grey in Midbrain
- descending fibers to
Nucleus Raphe Magnus
= inhibition of ALS in Posterior Horn of SC
How does the
Squeeze painful area manually
A-alpha and A-beta fibers release opiates
Opiates inhibit nociceptive pain fibers
What commisure do the secondary nerve fibers utilize to decussate to their respective ALS sites?
Anterior white commissure