Projections of leg proprioceptors within the CNS of the fly Phormia in relation to the generalized insect ganglion

We previously reported a modality‐specific layering of leg sensory axons in the CNS of the flies Phormia regina and Drosophila melanogaster with tactile and gustatory axons projecting into a ventral layer and the proprioceptive hair plate axons into an intermediate layer. Here the description is expanded to include the afferent projections of campaniform sensilla on the legs and wings of Phormia. The leg campaniform sensilla produce a number of patterns of projections within an intermediate layer of their ganglion, some of which project intersegmentally into the other thoracic ganglia. One of these patterns is shared by the hair plate sense organs. Selected wing campaniform sensilla were also stained and showed that there is little or no overlap between the projections of leg and wing campaniform sensilla. Similarities with the arrangement of campaniform sensilla and their central processes in Drosophila melanogaster are discussed. To apply the results of this study to a broader range of insects we provide an atlas of the fly CNS and compare it with the locust, which has been the model for much insect neuroanatomy and neurophysiology. © 1992 Wiley‐Liss, Inc.

[1]  J. Pringle.  Proprioception In Insects: II. The Action Of The Campaniform Sensilla On The Legs , 1938 .

[2]  D. Moran,et al.  Form and Role of Deformation in Excitation of an Insect Mechanoreceptor , 1973, Nature.

[3]  K. Pearson,et al.  Properties of the trochanteral hair plate and its function in the control of walking in the cockroach. , 1976, The Journal of experimental biology.

[4]  J. S. Altman,et al.  A silver intensification method for cobalt-filled neurones in wholemount preparations , 1977, Brain Research.

[5]  A. Ghysen.  Sensory neurones recognise defined pathways in Drosophila central nervous system , 1978, Nature.

[6]  J Palka,et al.  Neural projection patterns from homeotic tissue of Drosophila studied in bithorax mutants and mosaics. , 1979, Developmental biology.

[7]  A. Ghysen.  The projection of sensory neurons in the central nervous system of Drosophila: choice of the appropriate pathway. , 1980, Developmental biology.

[8]  J. Palka,et al.  Segments, compartments and axon paths in Drosophila , 1982, Trends in Neurosciences.

[9]  Nicholas J. Strausfeld,et al.  Lucifer Yellow Histology , 1983 .

[10]  P. Bräunig,et al.  The specificity of central nervous projections of locust mechanoreceptors , 1983, The Journal of comparative neurology.

[11]  R. Steinbrecht,et al.  Mechanosensitive and Olfactory Sensilla of Insects , 1984 .

[12]  R. Steinbrecht.  Chemo-, Hygro-, and Thermoreceptors , 1984 .

[13]  Malcolm Burrows,et al.  Nonspiking and Spiking Local Interneurons in the Locust , 1985 .

[14]  M. Burrows,et al.  Receptive fields of motor neurons underlying local tactile reflexes in the locust , 1986, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[15]  Central projections of identified Drosophila sensory neurons in relation to their time of development , 1986, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[16]  R. Stocker,et al.  Sensory projection patterns of supernumerary legs and aristae in D. melanogaster , 1987 .

[17]  J Palka,et al.  Physiological properties, time of development, and central projection are correlated in the wing mechanoreceptors of Drosophila , 1987, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[18]  G. Pollack,et al.  Correlations between structure, topographic arrangement, and spectral sensitivity of sound‐sensitive interneurons in crickets , 1987, The Journal of comparative neurology.

[19]  Y. Jan,et al.  Transformation of sensory organs by Mutations of the cut locus of D. melanogaster , 1987, Cell.

[20]  G. Laurent,et al.  Proprioceptive inputs to nonspiking local interneurons contribute to local reflexes of a locust hindleg , 1988, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[21]  H. Römer,et al.  Organization of a sensory neuropile in the auditory pathway of two groups of orthoptera , 1988, The Journal of comparative neurology.

[22]  R. Hustert,et al.  Motor neuronal receptive fields delimit patterns of motor activity during locomotion of the locust , 1988, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[23]  B. Beltz,et al.  Immunocytochemical Techniques: Principles and Practice , 1989 .

[24]  A. Ghysen,et al.  Compartments and the topography of leg afferent projections in Drosophila , 1989, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[25]  Y. Jan,et al.  Patterns of expression of cut, a protein required for external sensory organ development in wild-type and cut mutant Drosophila embryos. , 1990, Genes & development.

[26]  J. Whittle.  Pattern formation in imaginal discs. , 1990, Seminars in cell biology.

[27]  From embryo to adult: Anatomy and development of a leg sensory organ in Phormia regina, Meigen (Insecta: Diptera). II. Development and persistence of sensory neurons , 1991, The Journal of comparative neurology.