Diaphyseal remodelling in leprosy: A radiological and palaeopathological study

Diaphyseal remodelling is a pathological process of the proximal phalanges, metatarsals and metacarpals in all established types of clinical leprosy. It is suggested that the changes are the result of sympathetic neuropathy and alteration of peripheral vascular bed dynamics selectively stimulating extracortical osteoclastic and endosteal osteoblastic activity. There is an overall loss of diaphyseal cortical diameter, either in concentric or knife-edge pattern. There is extracortical absorption of bone and coincident endosteal bone deposition. Ultimately, there is diaphyseal pathological fracture, and subsequent resorption of the distal and proximal remnants due to combined continued diaphyseal remodelling and achroosteolysis.     

Assessing the preservation potential of temperate,lowland alluvial sediments using airborne lidar intensity

Archaeological applications of airborne lidar topographic data are now well established and documented. However, less well explored by archaeologists and palaeoenvironmentalists are the potential applications of lidar intensity data. Here we explore this potential to remotely determine the differential preservation potential of valley floor sediments, within a temperate, lowland environment, especially where preserved within palaeochannels. We compare airborne lidar intensity data with simultaneously collected terrestrial records of sediment organic content, moisture and stratigraphy. Results suggest that while a correlation exists between lidar intensity values and sediment properties, it is neither linear nor robustly predictable. Nevertheless it is suggested that examination of lidar intensity data serve a useful purpose when assessing valley floor alluvial sediments.