Volcanologists classify eruptions into several different types. Some are named for particular volcanoes where the type of eruption is common; others concern the resulting shape of the eruptive products or the place where the eruptions occur. Here are some of the most common types of eruptions:
The study of anxiety is at the root of psychoanalytic explorations of the human condition. Anxiety is a warning signal that danger is present and that overwhelming emotions may be felt, giving rise to unmanageable helplessness. The danger may be perceived as arising from internal or external sources, and be the response to a variety of powerful phantasies in the unconscious mind.
The physician is reliant upon her clinical judgment and. index of suspicion to distinguish between anxiety disorders and the medical. problems that mimic them. Pollard and Lewis suggest the following guidelines. A medical or substance induced cause of anxiety is more likely when the first. presentation is after age 40, there is fluctuation in the level of consciousness, or. there is evidence of autonomic instability. An anxiety disorder is more likely.