Superficial and deep tendon reflexes?
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Superficial reflexes \nElicited by gentle cutaneous stimulation \nThe plantar reflex tests the integrity of the spinal cord from L4 to S4 and is elicited by drawing a blunt object downward along the lateral aspect of the sole of the foot. The normal response is curling of the toes, but if the primary motor cortex or corticospinal tract is damaged, Babinski’s sign occurs (the big toe dorsiflexes and the smaller toes fan laterally). \nThe abdominal reflex occurs when the skin of the lateral abdomen is stroked to the side, above or below the umbilicus. The umbilicus will move towards the stimulated site. This checks the integrity of the spinal cord from T8 to T12.\n \nDeep tendon reflexes \nOpposite of the stretch reflex – muscle relaxation and lengthening in response to contraction. \nDeep tendon reflexes are polysynaptic and ipsilateral
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A simple was to state it: The sensation that you react to, like a pinprick, or sudden shortening of your tendon (like when you slip) sends a message along the sensory axon.  This communicates with a motorneuron in your spinal cord, which immediately sends a signal to a muscle-so that you jerk your hand back from pain, or move your leg to catch yourself before you fall.  The whole sequence doesnt involve your brain at all, its all done in your spinal cord- a single synapse.
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stimulus to a nerve center such as the knee or elbow can cause an involuntary flection of the appendage (You kow when you get a physical and the doctor uses that little hammer thinggy and hits you just below the knee cap and your leg jumps?)\nOther involuntary responses could be blinking your eyes when something comes at your face, or as others noted, a sexual response to stimuli
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i ruptured a tendon by repeatedly hitting my wrist on a stapler- i also injured myself playing volleyball hitting a ball with the inside of my arm- my doctor told me that the nerves are really close to the bones in your arm- doctors- a good source of medical information!
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If you think your reflexes have slowed down at age 18, there may be a physical problem causing it.  The first thing you should do is get a complete check-up.  Let your doctor know.  If everythings ok, find a trainer willing to work with you so that your work-outs are done correctly and under supervision.\n\nOr, you could have someone throw wrenches at you like in  the movie Dodgeball
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Justinyantis is correct.\nYou can test this for yourself by trying to grip something whilst wearing gloves (not rubber/latex).\nGeckos are able to climb walls and hang onto ceilings using much the same mechanism, though their ridges are finer and more numerous.
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impulse movement without stimulation
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>>>>>What reflexes do you retain while unconscious?\n\nThat depends on the level of unconsciousness. It isn’t a binary state.  For example a person who is lightly dozing is unconscious, but they are much more responsive to stimuli than a person who is under anaesthetic.  Different reflexes are apparent at each stage.\n\n>>>>Would your eyes still water if something was in them?\nUsually, yes. They eye blink reflex, ie will the eye respond when tapped, is commonly taught as one of the tests for death or total lack of sensation. It’s pretty deeply wired. At the deepest levels of aneasthesia or coma, possibly not. \n\n>>>Would you still kick if your knee was tapped? \n\nIt should do. That reflex has nothing to do with the brain at all and should operate even if the subject is dead.\n\n>>>>>What about after death? Does the knee-jerk reflex still work?\nYes, at least to the point they the muscles and nerves deteriorate beyond function.\n\nZero said “your brain is why you have reflexes in the first place”\n\nNope. \n\nReflexes in the head operate off the brain. But by definition reflexes elsewhere in the body operate off the spinal cord.\n\nEven with reflexes in the hea dit is quite posible to be 'brian dead' and still have operational reflexes. Brain death means the higher brain centres have ceased functioning, some reflex centres can still be responding.
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There are a lot of physical and psychological reactions that could be called reflexes.  Can you narrow down the question a little?
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http://en.wikipedia.org/wiki/Photic_sneeze_reflex
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flexibility, strengthening, sensorimotor function, motor development and functional activities
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Sensory = afferent and dorsal\nMotor = efferent and ventral
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Flexibility, balance, agility, and force
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Reflexes are pure nerve’s response! If you touch a flame with a finger you’ll immediately put it away as the result of just your nervous system response keeping homeostasis of your hand
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Reflex only in that one does not have to think about the process.  It is slightly different for four legged animals than for two legged species.  In all cases it involves both inner ear preceptors and usually the eyes as well.  The term “equilibrioception” is seldom used to describe or discuss what is normally called just the “sense of balance.”\nThe organ involved is called the vestibular apparatus, but it is the brain’s perception that is important.  See the article below:
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you are referring to tendonitis and carpal tunnel syndrome which is caused by repetative motions, most cases occur in occupational situations. Most likely someone who writes a lot and secretaries who type evey day.  You can speak to any Orthopedic doctor about this, it is nothing new
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Urban legend.\nI believe that the fingers are more controlled by the muscles higher up in the arm (move a finger and feel on the inside of the arm between the elbo and wrist).\nCarpal tunnel is a whole 'nother problem.