Skin Senses Pressure, Temperature & Pain

The Skin Senses Skin is the _________ sense organ Remember Me? Skin is the _________ sense organ Makes up about _______of your body weight Avg of about ______________of skin on adults You shed about _________ million skin cells every day That’s _______________ per minute Other senses are found in __________ areas of the body (eye, ear, etc) your sense of touch can be found all over your body Your skin is filled with ________________that send info to your spinal cord The Skin Senses

Medulla From your spinal cord, the signal crosses in the ___________________ Part of the ___________________ Functions are ____________________ Regulates ________________ ______________and breathing Transfers information from ________________into brain

Thalamus Information transfers from the _____________ to the thalamus The _________ is found in each ____________ (plural = thalami) Almost ALL _____________ info goes to the thalamus _________ before going to the rest of the brain Exception is _____________ Majority of ALL signals going to the ___________pass through this It also receives info from the ___________, modulates it and __________________________

Somatosensory Cortex Thalami send info to the _______________ _________________ This is the area that processes ALL sensory info related to ________, pain, ___________ Part of the _________________ lobes

Somatosensory Cortex Each neuron takes its information to a specific place in the somatosensory cortex. Next, that part of the somatosensory cortex gets to work on figuring out what the information means. Think of it like scientists sending data to a data analyst. Each scientist, like the neuron, gathers information and sends it to a master analyzer or the somatosensory cortex.

Touch Four basic skin senses are ____________________ All skin ___________________ are a combination of these four basic senses These parts can ___________ to create different touch sensations. For example, burning is pain, warmth, and cold. Itching is gentle stimulation of pain receptors

Temperature Temperature is sensed by ________________ under the skin We have warm/hot and cold ____________ Warm/hot – are not stimulated above about ___________ celsius Then the _____________take over to avoid skin damage Cold – are not stimulated under about ______________(this is why you can start to feel numb) Way more __________ receptors than warm/hot Most are in the ________________

Pressure Only pressure has identifiable____________ receptors (__________________) located beneath the skin They convert _____________ stimulation into neural messages to send to the brain. Constant pressure causes ________________ ______________ and it either reduces the number of signals or quits sending them all together. (like the clothes on your body) - Sensory receptors are located _________ on the body so certain areas are more ________ than others.

TOUCH Time for an EXPERIMENT! The amount of _______________________ dedicated in the brain depends on the sensitivity of that area. This has been mapped as the somatosensory map or ________________ Time for an EXPERIMENT!

SOMATOSENSORY CORTEX