What is an ipsilateral reflex? a contralateral one?
142170
An IPSI-lateral reflex is a response that occurs on the SAME-side as the stimulus is presented; CONTRA-lateral reflex responses occur on the OPPOSITE-side of the stimulus presentation.  When I was studying it, I used the roots of the words to help me remember, which is why I wrote it out that way.
506570
its this thing called reflex arc. see this pic n u might get it. it has stuff to do with neurons n i dont feel like writing the whole crap.\nlol thnx hmmm didnt see wat is said :) its actually\nhttp://dtc.pima.edu/~biology/201alpha/lesson10/reflexarc.jpg
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A reflex action is a stereotyped (involuntary) motor response elicited by a defined stimulus. 1 A reflex action is mediated via the reflex arc.\n\nA reflex arc is the neural pathway that mediates a reflex. It generally does not involve the brain. In higher animals it is composed of a spinal "reflex integration center" composed of interneurons to connect affector (sensory stimulation) and effector (response) signals. While the reflex generation may be initiated by nociceptive input, extensive processing takes place within the spinal cord. The neural connection from the primary sensory neurons to the motor neurons is a poly-synaptic pathway (Andersen).\n\nIn lower animals reflex interneurons not necessarily inolve the spinal cord, see e.g., lateral giant neuron of crayfish.\n\nA reflex to a stimulus is almost simultaneous, as the reflex arc doesn't involve the brain at all.\nA reflex action or reflex is a biological control system linking stimulus to response and mediated by a reflex arc. Reflexes can be built-in or learned. It occurs very quickly before thinking. Before the message is sent to the brain the spine picks it up and sends it back to the muscle causing spasm.\n\nSimple reflex\nA simple reflex is entirely automatic and involves no learning.\n\nAn example is the escape reflex (e.g., the sudden withdrawal of a hand in response to a pain stimulus), or the patellar reflex (the jerking of a leg when the kneecap is tapped). Sensory cells (receptors) in the stimulated body part send signals to the spinal cord along a sensory nerve cell. Within the spine a reflex arc switches the signals straight back to the muscles of the body (in this case the arm or the leg) (effectors) via an intermediate nerve cell and then a motor nerve cell; contraction of the leg occurs, and the muscle contracts (the arm or leg jerks upwards). Only three nerve cells are involved, and the brain is only aware of the response after it has taken place. Such reflex arcs are particularly common in animals, and have a high survival value, enabling organisms to take rapid action to avoid potential danger.\n\nConditioned reflex\nA conditioned reflex involves the modification of a reflex action in response to experience (learning). A stimulus that produces a simple reflex response becomes linked with another, possibly unrelated, stimulus. For example, a dog may salivate (a reflex action) when it sees its owner remove a tin-opener from a drawer because it has learned to associate that stimulus with the stimulus of being fed.\n\nReaction time\nFor a reflex, reaction time or latency is the time from the onset of a stimulus until the organism
199287
Also, move your knees from side to side. It releases a trapped nerve if it's siatica.
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-sneezing\n-blinking when someone points a bright light at you\n-putting away your hand when it's being hurt or burtn\n-suddenly jumping when you hear a loud noise\n-clenching your fists and toes when you have an orgasm\n-shaking when it's cold\n\nOh, and if you happen to have a baby, try touching his/her cheek softly with your finger, they grab it as if it were their mum's breast and that's also a reflex
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Yeah, well you're consciously doing that with your body.  If you don't believe that you are actually controling those movements, there are only two posibilities:  1.  You have a serious neurological disorder that may have physiological causes and you should seek help immediately.  This is very, very unlikely.  2.  You have a dissociative pyschological disorder, some sort of schizophrenia.  You should seek help immediately.
754955
Interesting question. Possibly related to our ancestors time in the trees. A strong grip would be essential for survival and this involuntary reflex is a relic from that time.
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This is called the "sensory homunculus" and the "motor homunculus" diagrams.  Do a google image search for either of these terms:\n\nHere are many versions of the "sensory homunculus" diagram.\nhttp://images.google.com/images?svnum=10&hl=en&lr=&q=sensory+homunculus&btnG=Search\n\nAnd here's the "motor homunculus" diagram:\nhttp://images.google.com/images?svnum=10&hl=en&lr=&q=motor+homunculus&btnG=Search\n\nI found a version here:\nhttp://en.wikipedia.org/wiki/Trigeminal_nerve#Touch.2FPosition_Sensation\n\nThe following page has a more explanatory version, but the above is more up-to-date:\nhttp://www.karger.com/gazette/67/Field/art_4.htm
991149
That is the Babinski reflex that the doctor is checking.  In Babinski, the big toe flexes toward the top of the foot and the other toes fan out when the doctor strokes your foot. This is normal in younger children, but abnormal after the age of 2.  After age 2, the nervous system is mature enough that you should not respond that way.
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Right Shoulder corresponds to the cervical plexus' right aspect which maintains and nourishes that area.\n\nIn yogic philosophy, the right cervical plexus (Right Vishuddhi Chakra) represents the center of sweetness and diplomacy. If you look at it from a yogic point of view, it is a manifestation of a blockage of the R. Vishuddhi. To confirm or deny take a short test. Do these additional malfunctions related to the right cervical plexus manifest:\n\n1. Anger, use of sharp words.\n2. Inability to handle pressure situations diplomatically.\n3. Headache in the left part of the head/forehead.\n4. Issues with the liver.\n5. Heartburn/Constipation.\n\nIf some of the above manifest, then it might be a problem in the subtle system.\n\nthe solution is chakra cleansing and kundalini awakening is one good way to do it. Where could you learn it? There is possibly a free class closeby if you would care to look up on the Meditation Class directory (Sahaja Yoga is a method of cleansing chakras through Kundalini):\nhttp://sahajayoga.org/worldwidecontacts/default.asp\n\nTry out the basic excercise online:\nhttp://sahajayoga.org/experienceitnow/default.asp
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reflexology...big toe = head/neck
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There is:\nRegular Foot (left forward)\nGoofy Foot (right forward)\nDuck (either forward - centered)
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Reflex responses actually occur in the spinal cord; so the flight reflex, if already triggered (i.e., the chicken sees that axe a'comin') could keep firing even after the brain is no longer in the picture. \n\nThe chicken has a limited amount of time, of course, since it's bleeding out, but during that period, anything that's happening on the reflex level still can happen.\n\nAn old biology experiment (I take that back - after searching, it's apparently still being done) involved essentially cutting off a frog's head in such a manner that there was no brain left, but the spinal cord and peripheral nerves were intact. Said frog would turn itself back over if rolled onto its back, and would jerk its foot away from a shock, demonstrating that the reflexes are handled in the spinal cord, not the brain. (Sorry about your head, pal.)
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Ipsilateral in layman's term means 'same side'. I'm assuming you know what paralysis means. When there is a problem/lesion (upon investigation) on one side of the brain or nerve (e.g. right side), rendering a person paralysed on his right body part, it means, the person is affected on the same side of his lesion = Ipsilateral.\n\n Lesion on right/left side of brain/ nerve = Paralysis on right/left side of body = Ipsilateral Paralysis.\n\np/s: When a paralysis occurs on the opposite side (e.g left) of his lesion (e.g right), it is known as 'Contralateral' Paralysis.
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http://en.wikipedia.org/wiki/Photic_sneeze_reflex
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In the opposite direction of the applied force or motion
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I am the opposite of you. I am a left handed but i mostly do things with my right, I've been told that such persons who use both hands for something are balanced, they don't do everything with one hand. :)