Current Research

Past projects:

Lapping in Dogs and Opossums:

A review of old films along with an inquiry by Roman Stocker of MIT led Dr. Crompton to review some older xray footage of opossums lapping and some data on tongue movement in dogs during lapping. He has since expanded this work, doing high speed video x-rays of his dog, Mathilda, while lapping, and has confirmed that Stocker's observation about lapping in cats holds true for dogs as well: liquid travels into the mouth via the top of the tongue, rather than as it appears, scooped up by the back of the tongue.

Neural control of swallowing in juvenile pigs:

An NIH-funded research project is underway in conjunction with Professor RZ German (University of Cincinnati) and Professor A Thexton (University of London). The aim of the project is to determine the nature and anatomical position of the stimuli needed to initiate a swallow.

Neural control of mastication in Australian marsupials:

In conjunction with Professor R. Baudinette (University of Adelaide), Professor D. Lieberman (Harvard University), and Dr. Tomasz Owerkowicz (University of Adelaide), data has been collected on red kangaroos, hairy-nosed wombats, potoroos and Tasmanian devils. Herbivory developed independently in marsupial and placental herbivores. The tacit assumption that motor control of jaw movements are smilar in these two major groups is not correct.

Structure of the skulls of late Triassic and early Jurassic non-mammalian synapsis and mammals

In conjunction with Dr. Zhexi Luo, Dr. J. Bonaparte and Professor J. Hopson.