• Publications
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Heart rate in spiders: influence of body size and foraging energetics.
Resting heart rates in 18 species of spiders as determined by a cool laser transillumination technique range from 9 to 125 beats per minute. Cardiac frequencies obtained in this fashion may readily
Morphogenesis of catecholaminergic interneurons in the frog spinal cord
TLDR
During embryonic and larval development of the frog Xenopus laevis, a bilateral population of cerebrospinal fluid‐contacting neurons matures in the ventral spinal cord and morphogenetic changes of the catecholaminergic cell population begin to show how the cells become partitioned within the floor plate region of the spinal cord.
Differentiation of an identified sensory neuron (SR) and associated structures (CTO) in grasshopper embryos
  • R. Heathcote
  • Biology
    The Journal of comparative neurology
  • 10 October 1981
TLDR
The differentiation of an identified sensory neuron, the grasshopper wing hinge Stretch Receptor (SR), is examined throughout embryogenesis and intracellular recording from the cell body of SR was used to determine the onset of electrical excitability and the characteristics of the somal action potential.
Morphogenesis of adrenergic cells in a frog parasympathetic ganglion
TLDR
The development of the parasympathetic cardiac ganglion of the frog Xenopus laevis was marked by the differentiation of a population of adrenergic small intensely fluorescent cells; this situation provided an opportunity to determine whether morphogenesis of the two cell types was correlated.
Growth and morphogenesis of an autonomic ganglion. I. Matching neurons with target
TLDR
Manipulation of animal culture conditions and hormone levels has shown that the addition of neurons to the ganglion continues up to the characteristic adult number and depends upon neither the chronological age nor the developmental stage of the animal.
Dystroglycan overexpression in vivo alters acetylcholine receptor aggregation at the neuromuscular junction.
TLDR
Overexpressed dystroglycan altered AChR aggregation in a rostral-caudal gradient, consistent with the sequential development of neuromuscular synapses along the embryo, and supports the hypothesis that dystoglycan is not the myotube-associated specificity component, (MASC) a putative coreceptor needed for agrin to activate muscle-specific kinase (MuSK) and signal ACh R aggregation.
Reduction in cell size during development of the spinal cord
TLDR
Both mitotic and postmitotic cells decrease in size during spinal cord development, and the two mechanisms are prevalent at different developmental stages with reductive division and cellular atrophy common during embryonic and larval phases, respectively.
Protein phosphatases regulate the growth of developing neurites
Physiological development of a monosynaptic connection involved in an adult insect behavior
  • R. Heathcote
  • Biology
    The Journal of comparative neurology
  • 15 May 1980
TLDR
The ontogeny of elements of the nervous system involved in locust flight is examined, finding that neurons and synapses involved develop concomitant with the behavior and are activated at the appropriate time by, for example, the release of inhibition.
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