ankle clonus, foot clonus a series of abnormal reflex movements of the foot, induced by sudden dorsiflexion, causing alternate contraction and relaxation of the triceps surae muscle. wrist clonus spasmodic movement of the hand, induced by forcibly extending the hand at the wrist.oe clonus abnormal rhythmic contraction of the great toe, induced by sudden passive extension of its first phalanx. wrist clonus spasmodic contraction of the hand muscles, induced by forcibly extending the hand at the wrist.
It is not only the diversity of natural mountain species that is of value to humankind, both intrinsically and as a source of wild foods such as mushrooms, game and birds, and many other non-timber forest products. Mountains are also important as centres of crop diversity.The maintenance and expansion of mountain populations in many parts of the world have been made possible by the introduction of potatoes and maize from Latin America. The original precursors of wheat came from the mountains of the Near East.UTTING MOUNTAINS ON THE AGENDA. The global importance of mountains has only recently been widely recognized. While scientists have been active in mountain regions for over two centuries, each typically focused on his or her own specialization in one or more mountain valleys or ranges.
A mountain is a large landform that stretches above the surrounding land in a limited area, usually in the form of a peak. A mountain is generally steeper than a hill. Mountains are formed through tectonic forces or volcanism.he highest point in San Francisco, California, is called Mount Davidson, notwithstanding its height of 300 m (980 ft), which makes it twenty feet short of the minimum for a mountain by American designations. Similarly, Mount Scott outside Lawton, Oklahoma is only 251 m (823 ft) from its base to its highest point.