Predictive control of intersegmental tarsal movements in an insect

  title={Predictive control of intersegmental tarsal movements in an insect},
  author={Alicia Costalago Meruelo and David M. Simpson and Sandor M. Veres and Philip L. Newland},
  journal={Journal of Computational Neuroscience},
In many animals intersegmental reflexes are important for postural and movement control but are still poorly undesrtood. Mathematical methods can be used to model the responses to stimulation, and thus go beyond a simple description of responses to specific inputs. Here we analyse an intersegmental reflex of the foot (tarsus) of the locust hind leg, which raises the tarsus when the tibia is flexed and depresses it when the tibia is extended. A novel method is described to measure and quantify… 
In vitro Analysis of the Efficacy of Selected Commercial Acaricides on The Cattle Tick Rhipicephalus (Boophilus) annulatus (Acari: Ixodidae)
The demonstration of acaricides resistancedevelopment as demonstrated by the ticks in laying of eggs after dipping in acaricide is a call to the need for discovery and use of alternative tick control methods with good therapeutic dose and theneed for continuous evaluation of available acarocide.


The organization of inputs to motoneurons of the locust metathoracic leg.
  • M. Burrows, G. Horridge
  • Biology
    Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 1974
Study of the inputs upon groups of named motoneurons allows identification of the interneurons which act on them, and reveals that posture, elicited responses and spontaneous movements are determined by selection of different combinations of interneURons.
Identified nonspiking interneurons in leg reflexes and during walking in the stick insect
The described properties of interneuron type E4 in the actively behaving animal show that these interneurons are involved in the organization and coordination of the motor output of the proximal leg joints during reflex movements and during walking.
Dynamics of neurons controlling movements of a locust hind leg II. Flexor tibiae motor neurons.
Although the flexor motor neurons receive many common inputs during FeCO stimulation, each individual has specific dynamic response properties, and some motor neurons respondbest at low frequencies, whereas others respond best at higher frequencies of stimulation.
Dynamics of neurons controlling movements of a locust hind leg. III. Extensor tibiae motor neurons.
Model predictions of the responses of the motor neurons showed that the first-order characterization poorly predicted the actual responses of FETi and SETi to FeCO stimulation, whereas the addition of the second-order (nonlinear) term markedly improved the performance of the model.
Monosynaptic Interjoint Reflexes and their Central Modulation During Fictive Locomotion in Crayfish
Paired recordings indicate that such a modulation of the monosynaptic interjoint reflex could be due to both a phasic change in the excitability of the motor neurons and presynaptic inhibition that reduces the excitatory input from CBCO primary afferents.
Nonlinear system analysis of local reflex control of locust hind limbs
Improvements to the previously used experimental methods, equipment and nonlinear system identification methods, and validation of the models using biologically more realistic stimulation signals has been carried out to determine where they perform well and to identify their limitations.
The dynamics of analogue signalling in local networks controlling limb movement
Improved data analysis methods for describing neuronal function that are more robust and allow statistical analysis are developed and tested, finding that nonlinear models provided an improved fit in describing the response properties of interneurons that were then classified with statistical clustering methods.
Coactivation of leg reflexes in the stick insect
The results indicate that any change of the amplification factors of resistance reflexes in the leg show a large variation and influences the Reflexes in all leg joints in the same way.
Intersegmental reflex coordination by a single joint receptor organ (CB) in rock lobster walking legs.
A complex picture of both tonic and dynamic, inra- and intersegmental reflex regulation of the positions and movements of the limb segments emerges.
Reflex Effects of the Femoral Chordotonal Organ Upon Leg Motor Neurones of the Locust
Elicited movements of the hind legs or apparently spontaneous changes of excitability enhanced or masked the typical response of the motor neurones to stimulation of the FCO, indicating that the effects of this sense organ are not to be viewed as rigid, but as modifiable in the context of the behaviour of the animal.