Sensory Physiology (touch and proprioception) Flashcards
How many neurons does it take to get to the skin to the parietal lobe?
3 neurons
What is the path the neurons take form the skin to the parietal lobe?
-receptor
-first order neurons
-second order neurons
-third order neurons
-primary somatosensory cortex
Where do the neurons of the dorsal column cross over?
in the medulla
Where do neurons of the spinothalamic tract cross over?
in the spinal cord
What type of sensory information is felt by the dorsal column?
touch, pressure, and proprioception
What type of sensory information is felt by the spinothalamic tract?
pain and temperature
What are the types of sensory receptors?
- mechanoreceptors
- chemoreceptors
- thermorecetors
- nociceptors
- photoreceptors
What do mechanoreceptors detect?
compression/stretch
Where are mechanoreceptors?
skin, muscle spindles, hearing, equilibrium, arterial pressure
What do chemoreceptors detect?
ligands
What do thermoreceptors detect?
cold/warm
What do nociceptors detect?
damage
What do photoreceptors detect?
light
What is the adequate stimulus?
the type of energy that a receptor is most sensitive
What is modality?
the specificity for a particular energy type
