Leg pain from degenerative disc disease can also result if the nerve root is compressed. This happens because as the disc degenerates it shrinks and moves, and as a result, there is not as much room for the nerve roots. This is also known as foraminal stenosis. Leg pain from a compressed and inflamed nerve root is typically shooting and electric.
Altruistic behaviour is therefore the opposite of egoistic behaviour. It involves intention to help others when used of human behaviour, but the fact that some animal behaviour is judged to be altruistic indicates that there are two possible bases to a definition: intentionality, and behavioural effects.
altruism. n. 1. the principle or practice of unselfish concern for the welfare of others. 2. (Philosophy) the philosophical doctrine that right action is that which produces the greatest benefit to others. [C19: from French altruisme, from Italian altrui others, from Latin alterÄ«, plural of alter other].. the principle or practice of unselfish concern for the welfare of others (opposed to egoism). 2. behavior by an animal that may be to its disadvantage but that benefits others of its kind.