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Skin receptors
:
Your skin and deeper tissues contain millions of sensory receptors.
Most of your touch receptors sit close to your skin's surface.
Light touch
•
Meissner's corpuscles are
enclosed in a capsule of
connective tissue
•
They react to light touch and are
located in the skin of your palms,
soles, lips, eyelids, external
genitals and nipples
•
these areas of your body are
particularly sensitive.
Heavy pressure
•
Paccinian corpuscules sense
pressure and vibration changes
deep in your skin.
•
Every square centimeter of your
skin contains around 14 pressure
receptors
Pain
•
skin receptors register pain
•
pain receptors are the most
numerous
•
each square centimeter of your
skin contains around 200 pain
receptors
Temperature
•
skin receptors register warmth and cold
•
each square centimeter of your skin contains 6 receptors for cold and 1 receptor for warmth
•
Cold receptors
start to perceive cold sensations when the surface of the skin drops below 95 º F. They
are most stimulated when the surface of the skin is at 77 º F and are no longer stimulated when the
surface of the skin drops below 41 º F. This is why your feet or hands start to go numb when they are
submerged in icy water for a long period of time.
•
Hot receptors
start to perceive hot sensations when the surface of the skin rises above 86 º F and are
most stimulated at 113 º F. Beyond 113 º F, pain receptors take over to avoid damage being done to the
skin and underlying tissues.
•
thermoreceptors are found all over the body, but cold receptors are found in greater density than heat
receptors – most of the time of our environment is colder than our body temperature
•
The highest concentration of thermoreceptors can be found in the face and ears so your nose and ears
always get colder faster than the rest of your body on a chilly winter day