Among sensory systems, the somatic sense is exceptional in its ability to detect a wide range of chemical, mechanical and thermal stimuli. How this sensory diversity is established during development remains largely elusive. We devised a method (BAPTISM) that uses the photoconvertible fluorescent protein Kaede to simultaneously analyze birthdate and cell fate in live zebrafish embryos. We found...

The genus Procoryphaeus Mazur, 1984 is revised herein. It contains three species: Procoryphaeus violaceus (Lewis, 1905) from Thailand: Tenasserim Mountains; Malaysia: Borneo: Sabah; Indonesia: Java, Sumatra and Papua, Procoryphaeus pilosus (Lewis, 1893) from Tanimbar Island, Indonesia and Procoryphaeus wallacei (Marseul, 1864) from Indonesia: Papua. All type specimens are figured, and male geni...

In a sense, all reality is virtual. It is constructed through our sense organs and cognitive apparatus. Reality is not "out there", it is what we take to be "out there". The brain is tuned in a sophisticated way to the perceptual invariants of our physical environment. Using these invariants, one can also produce illusions which the brain will be unable to discriminate from physical reality. Th...

The extent to which co-ordinated rhythmical patterns of locomotory movement are to be regarded as expressions of intrinsic activity within the central nervous system, and how far they are dependent upon the patterns of impulses received from peripheral sense organs, remains a fundamental problem in general physiology. In previous communications we have discussed this problem with reference to t...

Aquatic hypercapnia may have helped to drive ancestral vertebrate invasion of land. We tested the hypothesis that amphibious fishes sense and respond to elevated aquatic PCO2 by behavioural avoidance mechanisms, and by morphological changes at the chemoreceptor level. Mangrove rivulus (Kryptolebias marmoratus) were exposed to 1 week of normocapnic control water (pH 8), air, hypercapnia (5% CO2,...

The present study is a cladistic analysis of morphological characters focusing on the file of the mandible, the apices of the maxillae, the rupturing device on the maxillae, the internal structures of the mouthparts, and the external morphology of the labial segments as well as the distribution of labial sensilla in true water bugs (Hemiptera: Heteroptera, infraorder Nepomorpha). The study is b...

In aerospace medicine, attention focuses on the effects of the loss of gravitational pull on the body. The more fundamental question involved is the basic physiology of anti-gravity mechanisms upon the body. From this viewpoint, the entire spectrum of the consequences of weightlessness may be seen. Then evidence affirming the broad concept of sensory deprivation in general, and anti-gravity dep...

on the subject. During the last decade this subject has made remarkable progress and a huge amount of literature has appeared in different journals the world over and new articles are ' appearing at the rate of about one each day'. This book covers most of the modern knowledge of the subject, being a collection of the essential parts of the above material together with the results of personal o...

During the last decade, investigations into the mode of function of the Pacinian corpuscle have been focussed almOst exclusively on recording the activity of its nervous components, and some of the more recent histological studies (Quilliam and Sato, 1955; Pease and Quilliam, 1957) have contributed to interpreting the results so obtained. Lately, interesting structural modifications have come t...

Most sense organs of arthropods are ensconced in small exoskeletal compartments that hinder direct access to plasma membranes. We have developed a method for exposing live sensory and supporting cells in such structures. The technique uses a viscous light cured resin to embed and support the structure, which is then sliced with a sharp blade. We term the procedure a "goggatomy," from the Khoisa...