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Journal of comparative physiology

, Volume 150, Issue 1, pp 77–86 | Cite as

Proprioceptor responses and convergence of proprioceptive influence on motoneurones in the mesothoracic thoraco-coxal joint of locusts

  • R. Hustert
Article

Summary

  1. 1.

    In the mesothoracic thoraco-coxal joint ofLocusta movements of the coxa or mechanical stimuli applied to proprioceptors elicit characteristic afferent patterns. Most of these are phasic in response to certain directions and velocities of the rotary movements applied to the coxa (anterior joint CO, posterior joint CO, CO-system, pleurotrochantinal SR, joint condylus MS) and/or tonic in response to certain coxal positions (anterior joint CO, pleuro-trochantinal SR, joint condylus MS). Only one population of multipolar sense organs (joint condylus MS) is sensitive to load on the thoraco-coxal articulation.

     
  2. 2.

    The phase relationships of the responses from different proprioceptors to coxal movements can change when the plane of stimulation is altered from movement about one principal axis to another.

     
  3. 3.

    Responses in motoneurones of the coxal protractor, retractor, rotator and levator muscles to stimulation of the anterior joint CO only are described. Their temporal relationship is different from that produced by afferents of the CO-system alone during the same kind of stimulation.

     
  4. 4.

    When both anterior joint CO and CO-system are stimulated independently but simultaneously the afferent responses elicited converge onto motoneurones in an additive way and produce new patterns of motoneurone discharges.

     
  5. 5.

    This cooperative effect of just two proprioceptors may represent a more general coordinating principle for movement control: (i) Proprioceptors of one joint respond dynamically different to the same movement. (ii) Different movements of the joint alter the phase relationships between proprioceptive afferents. (iii) The influences from different proprioceptors converging to the level of motoneurones can be mutually inhibited or enhanced and new patterns of motoneurone coordination emerge with every change of the axis of movement.

     

Keywords

Principal Axis Rotary Movement Movement Control Temporal Relationship Mechanical Stimulus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviations

CO

chordotonal organ

CO-system

chordotonal organ system of the mesothorax

SR

strand receptor with central cell bodies

MS

multipolar sensillum (sensilla)

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References

  1. Bräunig P (1982) The peripheral and central nervous organization of the locust coxo-trochanteral joint. J Neurobiol 13:413–433Google Scholar
  2. Bräunig P, Hustert R (1980) Proprioceptors with central cell bodies in insects. Nature 283:768–770Google Scholar
  3. Bräunig P, Hustert R, Pflüger HJ (1981) Distribution and specific central projections of mechanoreceptors in the thorax and proximal leg joints of locusts. I. Morphology, location and innervation of internal proprioceptors of pro- and metathorax and their central projections. Cell Tissue Res 216:57–77Google Scholar
  4. Burrows M (1980) The control of sets of motoneurones by local interneurones in the locust. J Physiol (Lond) 298:213–233Google Scholar
  5. Burrows M (1981) Local interneurones in insects. In: Roberts A, Bush BMH (eds) Neurones without impulses. Cambridge University Press, London, pp 199–221Google Scholar
  6. Burrows M, Siegler MVS (1978) Graded synaptic transmission between local interneurones and motor neurones in the metathoracic ganglion of the locust. J Physiol (Lond) 285:231–255Google Scholar
  7. Campbell JI (1961) The anatomy of the nervous system of the mesothorax ofLocusta migratoria migratorioides R&F. Proc R Zool Soc (Lond) 137:403–432Google Scholar
  8. Heitler WJ, Burrows M (1977) The locust jump. II Neural circuits of the motor programme. J Exp Biol 66:221–241Google Scholar
  9. Hustert R (1978) Segmental and interganglionic projections from primary fibres of insect mechanoreceptors. Cell Tissue Res 194:337–351Google Scholar
  10. Hustert R (1982) The proprioceptive function of a complex chordotonal organ associated with the mesothoracic coxa in locusts. J Comp Physiol 147:389–399Google Scholar
  11. Hustert R, Pflüger HJ, Bräunig P (1981) Distribution and specific central projections of mechanoreceptors in the thorax and proximal leg joints of locusts. III. The external mechanoreceptors: The campaniform sensilla. Cell Tissue Res 216:97–111Google Scholar
  12. Kien J (1980) Mechanisms of motor control by plurisegmental interneurones in locusts. J Comp Physiol 140:303–320Google Scholar
  13. Mill PJ (ed) (1976) Structure and function of proprioceptors in invertebrates. Chapman and Hall, LondonGoogle Scholar
  14. Siegler MVS (1981a) Posture and history of movement determine membrane potential and synaptic events in nonspiking interneurons and motor neurons of the locust. J Neurophysiol 46:296–309Google Scholar
  15. Siegler MVS (1981b) Postural changes alter synaptic interactions between nonspiking interneurones and motor neurons of the locust. J Neurophysiol 46:310–323Google Scholar
  16. Pearson KG, Robertson RM (1981) Interneurones coactivating hindleg flexor and extensor motoneurons in the locust. J Comp Physiol 144:391–400Google Scholar
  17. Pearson KG, Wong RKS, Fourtner CR (1976) Connexions between hair-plate afferents and motoneurones in the cockroach leg. J Exp Biol 64:251–266Google Scholar

Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • R. Hustert
    • 1
  1. 1.Fakultät für BiologieUniversität KonstanzKonstanzFederal Republic of Germany

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