quiz 5 (exam 2) Flashcards
pacinian Corpuscle
VIBRATION & PRESSURE
Meissners Corpuscles
light touch
Merkels discs
light touch
Ruffini Corpuscles
stretching of skin
free nerve endings
terminates in the skin
detects pain, itch, change in temp
labeled lines
how brain tells electrical signals apart
sensory transduction
converts energy to electrical potential
sensory adaptation
avoid overload
decrease of receptor in response to stimulation
phasic receptos
sensory adaptation
AP decrease rapidly
tonic receptors
AP decrease slowly
little-no adaptation
Neuropatic Pain
persists after injury healed
disagrees w neuroplasticity
A delta fibers
myelinated axons (fast)
TRPM3
C fibers
unmyelinated axon
slow
TRPV 1
Proprioception
position and movement of body
muscle spindle
signals CNS when muscle in lengthened
sensitive to stretch
Golgi Tendon Orgon
signals CNS when muscle contracts
sensitive to tension
synergist
muscle acts w another muscle
antagonist
muscle counteracts
extension / flexion
Pyramidal system
CNS to Periphery
Cerebral Cortex & brainstem
lesions cause paralysis
Extrapyramidal System
basal ganglia & cerebellum
lesions Parkinson’s or Huntingtons disease
TRPV 1
detects heat (capsaicin)
physiological temp
TRPM 3
noxious heat
doesn’t respond to capsaicin
Extrapyramidal System - Basal Ganglia
Memory Movements
Extrapyramidal System - Cerebellum
Skilled Movements