ELSNER, ROBERT, WILLIAM N. HANAFEE, AND DOUGLAS D. HAAJMOND. Angiographr of the inferior vena cava of the harbor seal during simulated diving. Am. J. Physiol. 220(5) : 1155-l 161. 197 l.Radiopaque material was injected into the inferior vena cava of harbor seals. Serial contrast radiographs were then taken during simulated diving and control nondiving experiments. Diving was associated with con...

Air-breathing marine vertebrates that dive to find food deal with two fundamental problems, the effects of pressure at depth, and the need to actively forage while breathholding. Adaptations to diving can be divided into two categories, those that are associated with adaptations to pressure, and those associated with breath-hold diving. Adaptations to pressure have to deal with the mechanical e...

Although U.S. Navy diving is remarkably safe, because of the high-risk environment in which military divers work, accidents and mishaps do occur. Failures in leadership and situation awareness (particularly in risk and time assessment) were found to be the two most common causes of fatal and nonfatal U.S. Navy diving accidents and near misses. Responses to an attitude survey showed that junior ...

BACKGROUND Temporomandibular dysfunction (TMD) has been reported to be a common problem in divers, with a prevalence of up to 68%. No evidence for this is available. OBJECTIVE To investigate the prevalence of TMD in divers. METHOD Sixty three subjects were asked to retrospectively complete a questionnaire on symptoms of TMD after diving in warm and cold water areas and in daily life. RESU...

Locomotor activity by diving marine mammals is accomplished while breath-holding and often exceeds predicted aerobic capacities. Video sequences of freely diving seals and whales wearing submersible cameras reveal a behavioral strategy that improves energetic efficiency in these animals. Prolonged gliding (greater than 78% descent duration) occurred during dives exceeding 80 meters in depth. Gl...