The Brain 4 Flashcards
1
Q
modality of chemoreceptors
A
chemical changes
2
Q
modality of thermoreceptors
A
temperature - warm and cold
3
Q
modality of photoreceptors
A
light
4
Q
modality of mechanoreceptors
A
pressure
5
Q
modality of nocireceptors
A
noxious stimuli (pain)
6
Q
modality of proprioceptors
A
body and limb position
7
Q
what is receptive field of a sensory neuron?
A
the area of skin that once stimulated - produces a response in that neuron
8
Q
what is the two-point discriminative test?
A
a measure of tactile acuity - small receptive fields in areas of skin with large numbers of cutaneous receptors
9
Q
how does sensory information reach the sensory cortex?
A
medial lemniscal tract and spinal thalamic tract
10
Q
explain how action potentials occur in sensory neurons
A
- perception starts with stimulation of sensory receptors, each of which responds to a certain stimulus and leads to generation of AP
- this AP transmits information to the sensory cortex for
interpretation
