1. Touch Jon, Brittany, Ellen Meg, & Alex

2. Position and Movement  2 systems keep track of body, position, movement and balance:  Vestibular sense: body position and sense with respect to gravity Ex: tells us when we are moving or how we are positioned  Kinesthetic sense: keeps track of body parts relative to each other Ex: crossing your legs, tells you which hand is closer to phone when it rings

3. Phantom Limb (Kinesthetic Sense)  Phantom limb: the illusion that a limb still exists after it is gone

4. Balance (Vestibular Senses)  Inner ear: the essential organ of hearing that includes the vestibule, the semicircular canals, and the cochlea  Semicircular canal: three circular tubes in ear that contain fluid and help sense balance  Utricle: located in inner ear and uses small stones and fluid to detect motion and orientation  People often have bad balance when they are sick

5. Skin Senses  Sensory systems that process touch, warmth, cold, texture, and pain  Skin senses are connected to the somatosensory cortex in the parietal lobes  Sematosensory (sensory) cortex: processes input from parts of the body that are sensitive to touch

6. Gate Control Theory  Gate-Control Theory explains that incoming signals can be blocked  How?  Fast fibers deliver sensory info to brain  Slow fibers send messages more slowly to brain  Messages compete, and block pain messages in slow fiber from reaching brain

7. Skin Senses Continued…  Cutaneous Sense: the process by which objects or forces are perceived through contact with the body  Different receptors on our skin help us perceive what goes on around us:  Theromreceptor: the receptive portion of a sensory neuron that responds to temperature  Nocioreceptors: pain receptors for tissue injury  Mechanoreceptors: sensory receptors in the skin that respond to mechanical pressure and distortion  Cutaneous Receptors: sensory receptors in the skin that respond to pain and temperature

8. “You bit my finger, Charlie”  http://www.youtube.com/watch?v=_OBlgSz8sSM http://www.youtube.com/watch?v=_OBlgSz8sSM  Which receptor is responsible for the pain Charlie’s brother feels?

9. Pain  Pain: unpleasant sensation  The threshold of pain varies from person to person  Acupuncture: procedure of inserting needles in the body to relieve pain  Lamaze Method: psychological and physical preparation by a mother before childbirth that suppresses pain  People with congenital insensitivity to pain do not feel what is hurting them

10. Sense-Sational Facts  The skin is the largest organ in the body weighing 6-10 lbs.  Skin is least sensitive in the middle of your back  Skin is most sensitive in hands, fingertips, and lips

11. Works Cited  Davis, Stephen F., and Joseph Phalladino. Psychology. 4th ed. Upper Saddle River, NJ: n.p., 2004. 86-87. Print.  "Sense of Touch." Home Science Tools. N.p., 2010. Web. 11 Nov. 2010..http://www.hometrainingtools.com/ski n-touch/a/1388/  "Touch." Web. 11 Nov. 2010..  Zimbardo, Philip G., Robert L. Johnson, Ann L. Weber, and Craig W. Gruber. Position and Movement. Print.