Ascending Sensory Systems Flashcards
(21 cards)
Whate kind of muscle has neuromuscular spindles
All striated muscle
What does the neuromuscular spindle sense
Stretch and proprioception
What type of neurons are in neuromuscular spindles
A-alpha (very fast)
What does Meissners corpuscle sense
discriminative touch
Where can many meissners corpuscles be found
in fingertips
What type of neurons are in meissners corpuscles
A-beta (fast)
What does pacinian corpuscle sense
detection of vibration
Where can many pacinian corpuscles be found
palms and fingertips
What neurons on in Pacinian corpuscles
A-beta (fast)
What do Merkel nerve endings sense
discriminitive touch
where are merkel nerve endings found
fingertips
what nerve fibers do merkel nerve endings have
A-beta (fast)
What do free nerve endings sense
pain, crude touch, temperature
what fibers carry fast pain
A-delta
What fibers carry slow pain
C fibers
characteristics of fast pain
arrives in CNS quickly, precise location of stimulus, awareness of tissue damage
characteristics of slow pain
arrives in CNS relativcely slowly, poor location of stimulus, nagging sensation of lingering pain
where are rexed laminae located
in the posterior horn of the spinal cord
Which laminae carry pain signals
I,II and V
Lamina associated with fast pain (A-delta fibers)
Lamina I
Lamina associated with slow pain (C fibers)
Lamina II and V
