Characterization of the adhesive dermal secretion of Euprymna scolopes Berry, 1913 (Cephalopoda).

Bio-adhesion is a common and crucial process in nature and is used by several different species for camouflage, prey capture, hatching or to avoid drifting. Four genera of cephalopods belonging to four different families (Euprymna, Sepiolidae; Idiosepius, Idiosepiidae; Nautilus, Nautilidae; and Sepia, Sepiidae) produce glue for temporary attachment. Euprymna species live in near-shore benthic habitats of the Indo-Pacific Ocean, are nocturnal and bury into the seafloor during the day. The animals secrete adhesives through their epithelial glands to completely coat themselves with sand. In cases of danger, they instantaneously release the sandy coat as a sinking decoy to deflect predators. Earlier morphological investigations have shown that the adhesive gland cells of Euprymna scolopes are scattered on the dorsal epidermis. It has been proposed that neutral mucopolysaccharides, secreted by one gland type (goblet cells), are responsible for adhesion, whereas the release of the glue could be caused by acidic mucoproteins produced by ovate cells in the ventral epidermis. The ultrastructural re-investigation of the Euprymna epithelium in this study has indicated the presence of a new gland type (named flask cell), exclusively located in the dorsal epithelium and always neighboured to the known goblet cells. Based on our histochemical observations, the secretory material of the ovate cells does not display a strong reaction to tests for acidic groups, as had been previously assumed. Within the dermis, a large muscle network was found that was clearly distinctive from the normal mantle musculature. Based on our data, an antagonistic gland system, as previously proposed, seems to be unlikely for Euprymna scolopes. We hypothesize that the adhesive secretion is formed by two gland types (goblet and flask cells). The release of the sand coat may occur mechanically, i.e. by contraction of the dermal mantle muscle, and not chemically through the ovate cells.

"People are Getting Lost a Little Bit": Systemic Factors that Contribute to Falls in Community-Dwelling Octogenarians.

Octogenarians living in the community are the fastest-growing demographic in Canada. Simultaneously, they have the highest prevalence of falls and nine times greater risk of injury due to a fall. To understand how to improve the safety of octogenarians' aging-in-place, a systems approach is essential. Understanding how societal factors interact and affect the older adult can help care custodians identify and remove safety deficiencies that bring about falls. The purpose of this study was to identify system-wide factors contributing to falls in community-dwelling octogenarians. Eight falls were investigated using the systemic falls investigative method. Participants ranged in age from 83-90 years. Across-case analyses identified 247 contributing factors, grouped within four distinct themes: (a) everyday living has become risky; (b) supervision limitations; (c) health care system disconnects; and (d) poor fall risk identification and follow-up. This qualitative study provides systemic insights into how and why falls occur in community-dwelling octogenarians.

Assessing communication accessibility in the university classroom: towards a goal of universal hearing accessibility.

Measures of accessibility typically focus on the physical environment and aspects relating to getting into and out of spaces. The transient sound environment is less well characterized in typical accessibility measures. Hearing accessibility measures can be based upon physical indices or functional assessment. The physical measures are indices that use signal-to-noise ratios to evaluate audibility while the functional assessment tool adopts universal design for hearing (UDH) principles derived from principles of universal design. The UDH principles include (1) Optimization of the hearing environment for all; (2) Optimization of interactions between persons and objects to promote better hearing in an environment; (3) Optimization of opportunities for people to have multiple choices of interactions with one another; (4) Optimization of opportunities for people to perform different activities in and across environments; (5) Optimization of opportunities for people to have safe, private, and secure use of the environment while minimizing distraction, interference, or cognitive loading; and (6) Optimization of opportunities for people to use the environment without extra steps for hearing access during preparatory, use and/or after use phases. This paper compares the two approaches using case examples from post-secondary classrooms in order to describe the potential advantages and limitations of each.

Directions for advancing the study of work transitions in the 21st century.

OBJECTIVES: The purpose of this article is to share the details, outcomes and deliverables from an international workshop on work transitions in London, Ontario, Canada. PARTICIPANTS: Researchers, graduate students, and community group members met to identity ways to advance the knowledge base of strategies to enhance work participation for those in the most disadvantaged groups within society. METHODS: A participatory approach was used in this workshop with presentations by researchers and graduate students. This approach included dialogue and discussion with community members. In addition, small group dialogue and debate, world cafe discussions, written summaries of group discussion and reflection boards were used to bring new ideas to the discussion and to build upon what we know. FINDINGS: Two research imperatives and six research recommendations were identified to advance global dialogue on work transitions and to advance the knowledge base. Occupational justice can be used to support future research directions in the study of work transitions. CONCLUSIONS: Moving forward requires a commitment of community of researchers, clinicians and stakeholders to address work disparities and implement solutions to promote participation in work.

A systematic review of multidisciplinary outcomes in the management of chronic low back pain.

OBJECTIVE: Previous research has provided an inconsistent message as to the effectiveness of multidisciplinary programs to improve employment outcomes in clients with Chronic Low Back Pain (CLBP). The primary aims of this review were to: 1) update the evidence for the multidisciplinary treatment of CLBP to improve employment outcomes 2) assess what knowledge supports occupational therapy as contributing to a multidisciplinary approach in the treatment of CLBP. PARTICIPANTS: Working-age adults experiencing CLBP who took part in controlled trials evaluating multidisciplinary programs between July 1998 and July 2009. METHODS: Updated guidelines provided by the Cochrane Collaboration Back Review Group (BRG) were used to perform a systematic review to identify, appraise, and synthesize research evidence relevant to our research questions. RESULTS: Twelve unique articles were found, after a database search and citation tracking, only two of which were high quality. Our findings suggest that there is still conflicting evidence for the effectiveness of multidisciplinary programs to improve employment outcomes in CLBP. CONCLUSIONS: The results are discussed with reference to current methodological limitations found in the literature. Furthermore, occupational therapists were found to be underutilized in the included studies and future multidisciplinary programs should take advantage of the wide range of skills that occupational therapists can contribute in this practice area.

Contributing to operations of community agencies through integrated fieldwork experiences.

BACKGROUND: Occupational therapists are change agents who are well equipped to participate in community development. Community development projects can help agencies in many ways, including determining needs, educating stakeholders, developing novel programs, finding and creating resources, marketing the agency, and creating or implementing policy. In order for service agencies to profit, they need an understanding of the skills occupational therapists can offer. The best way to gain that knowledge may be through direct experience. PURPOSE: This paper describes the benefits that flow to community agency partners and to occupational therapy students from an innovative, integrated fieldwork model that links students with service agencies. KEY ISSUES: This approach has demonstrated many benefits to community partners, while allowing all students in an occupational therapy program to have community development experience. IMPLICATIONS: This is a cost-effective way to demonstrate the value of occupational therapy and to deliver multiple community development projects.

Life care plans: an emerging area for occupational therapists.

BACKGROUND: Life care plans, or cost of future care reports as they are often called in Canada, are medico-legal documents that predict probable future medical and rehabilitation needs and costs. They are used when someone has sustained a serious personal injury in an accident, as the result of medical malpractice, or due to some other unnatural cause. Life care plans are generally commissioned by third-party payers in order to set aside adequate reserves for future costs or to negotiate a settlement. SCOPE: Life care plans need to be grounded in knowledge of how personal injury law has been applied and interpreted. Therefore, Canadian law pertaining to the costs of future care in personal injury will be briefly reviewed. The balance of the article discusses the process used to develop a life care plan, the necessary content, and accepted formats for reports. The article concludes with a case example that demonstrates the application of life care planning skills. PRACTICE IMPLICATIONS: Occupational therapists are well suited to developing these plans by virtue of their training, knowledge base, and theoretical approaches. This is an emerging consultative role for experienced therapists.