A neurologist generally carries a straight pin, a wisp of cotton, car key or coins, and a tuning fork. Using these instruments and by asking the appropriate questions, he or she can test for the intactness of the senses of pain, temperature , pressure, kinesthesia, graphesthesia, itch, tickle, sexual sensation, light touch, two point discrimination, stereognosis, vibration, and proprioception. The reason a neurologist tests for the intactness of these sensations is that some of them are conveyed in one ascending pathway while others are conveyed in a second pathway that is anatomically different and distant from the first. The fact that one pathway may be damaged and another is intact may be of considerable diagnostic significance.