Retrospectroscope

The Tango

The perception of music is a complex subject not yet fully understood that has led to a huge bibliography spreading from its physics foundations to mathematical descriptions, from a neurophysiologic basis to psychological aspects, but also setting its feet strongly on cultural facets

Strange Musical Rhythms

Music, along with its attached rhythm, has been with man for centuries, developing and evolving along with him. Its influence on human behavior and mood can reach levels whose limits are still unknown, especially in everything related to perception, where the whole nervous system is involved

Spirometry: A Historical Gallery Up to 1905

In Latin, spirare means to breathe, hence, spirometry deals with the measurement of breath, which is the most common way to evaluate pulmonary function. Volume or flow of inhaled or exhaled air is so quantified offering values that permit an assessment of respiratory performance in health and disease. Asthma, emphysema, pulmonary fibrosis, obstructive lung pathologies can be gauged in their respective stages. It is an old procedure, still in use, simple and inexpensive, but highly significant in health care.