10.15 Notes Flashcards
Where are chemoreceptors?
On your tongue and in your nose
Photoreceptors
The receptors that are active if a photon of light reach it in the retina
Mechanoreceptors
Responds to movement of the skin
Thermoreceptors
Responds to temperature and specific degrees
Nociceptors
Pain receptors; stimulated by tissue damage
Somatosensation
Touch, proprioception, pain, and thermal sensation
Dorsal column medial lemmiscal pathway
Mediates touch and proprioception; enters the dorsal root ganglion
Pacinian corpuscles
High-frequency vibrations on the skin
Meissner’s corpuscles
Adapt rapidly to touch; why you don’t detect your clothes after short period of time
What allows you to type pain?
Free nerve endings
Dermatome
An area of the skin supplied by nerves from a single spinal root
Receptive field
Amount of skin that sends info to a single neuron
Shingles
Leaves lesions in the dermatome; damages the dorsal root ganglion
Is all sensory information perceived?
No
