Summary
Summary sensation&percetion
- Course
- 30440
- Institution
- University Of Notre Dame
this is a summary of the notes
[Show more]
Seller
Follow
Content preview
Insula→ interior cingulate➢ How are pain and temp related
○ Interoceptive Pathway
■ Sensory receptors, the free nerve endings, from the skin come in through spinal cord
○ Nociceptive and Thermoreceptors
○ Warm and cold fibers
■ Temperature applied to skin
■ 34 is skin temp
■ Firing rate increases as temp decreases
○ In dorsal horn, there are multiple layers called lamina
■ Nociceptive Lamina 1: first layer, shallow → respond to different properties of stimulus. They
cross over and go to the primary interoceptive cortex which is the Posterior Insula
○ Different region of Posterior Insula for each of the specific receptors
● NS=nociception specific
● cool=cool
● HPC= hot,pinch, cool → dynamic range stimuli
■ This Insula is bigger ein humans
➢ Temperature and pain
, ○
○ Recordings of different lamina 1 cells
○ Immediate - fast pain : conducted by NS cells
○ Slower building pain - more intense : HPC cells
○ When it comes to higher temps, HPC and NS cells do same thing
○ When things get cold, different
○ HPC increases burning pain from hot (or cold) stimuli
■ When activated, feel burning
○ NS cells dont fire at all in cold stimuli
○ Cool cells will fire more in colder temps
○ As colder, HPC will fire linear increase, dont asymptote
○ Activation of cool cells inhibit sensation of burning pain
■ But when cool cells asymptote, their firing rate stays constant
■ At one point those cool cells cannot inhibit
○ COOL decreases burning pain from cold stimuli.
○ COOL inhibits HPC.
○ COOL reach asymptote as temp decreases.
○ HPC keep increasing as temp decreases.
○ COOL no longer inhibit HPC as temp decreases.
○ Burning pain from noxious cold will result.
○ This unpleasant feeling will motivate your body to act.
○ Interoception because perception of physiological state (core body temp) not
external temperature
○ the signal is that the inside of the body is getting colder than the outside of the body
■ Cool cells are shallower
● As temp decreases, they wont register colder
■ HPC cells are deeper
● They will continue to say colder because they are deeper
○ Meaning inside of body getting colder
➢ The thermal Grill Illusion
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller andreamore02. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75057 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now