C3. P6 Flashcards
Why can nociceptors activate to pain but not sensation?
The stimulus must be high intense enough to pass the high thresholds
Is the A-route or C-route covered in myelinated nerve fibers?
A-route
Which route (A or C) is faster?
A-route
Which route (A or C) has thicker nerve fibers?
A-route
Which route transmits tactile, temperature, and pressure?
A-route
Which pain (A or C) is less intense?
C-route
What is the gate-control theory?
When gates are closed, pain signals cannot get through to projection neurons. When inhibitory interneurons aren’t firing, the gate is open
What are the two theorized factors that determine if gates are open or closed?
The intensity of the pain signals relative to non-pain signals and messages sent from the brain to the gate
What happens when pain signal intensity is lower than non-pain signal intensity?
It blocks our experience of pain
Can the brain signal the for the gates to close?
yes, but rarely
Where is the primary somatosensory cortex?
Parietal lobe
What is the PSC involved in?
Locating where the pain is coming from
Where is the insular cortex?
Frontal lobe
What is the insular cortex?
Activates when perceiving greater intensity of pain and uncomfortableness
Is the insular cortex top-down or bottom-up?
It integrates top down and bottom up information to shape pain experience
