Share This Author
Orthopteran DCMD neuron: a reevaluation of responses to moving objects. I. Selective responses to approaching objects.
1. The "descending contralateral movement detector" (DCMD) neuron in the locust has been challenged with a variety of moving stimuli, including scenes from a film (Star Wars), moving disks, and…
Role of an identified looming-sensitive neuron in triggering a flying locust's escape.
Flight-gating of the DCMD response resulting from rhythmic modulation of the flight motor neuron's membrane potential during flight means that the locust's escape behavior can vary in response to the same looming stimulus, meaning that a predator cannot exploit predictability in the locUST's collision avoidance behavior.
Gliding behaviour elicited by lateral looming stimuli in flying locusts
Tethered, flying locusts with visual stimuli looming from the side towards one eye in a way that mimics the approach of a predatory bird are challenged and a close match is found between the visual stimuli that elicit a gliding behaviour and those that are effective at exciting the DCMD neuron.
Seeing what is coming: building collision-sensitive neurones
Motor activity and trajectory control during escape jumping in the locust Locusta migratoria
The escape jumps that locusts produce in response to approaching objects are investigated and it is found that there are no bilateral differences in the motor programs of the left and right hindlegs that correlate with jump trajectory.
Orthopteran DCMD neuron: a reevaluation of responses to moving objects. II. Critical cues for detecting approaching objects.
The DCMD was very sensitive to the amount by which an edge traveled between frames on the display screen, which implies that the neurons in the optic lobe that drive this movement-detecting system have receptive fields of about the same extent as a single ommatidium.
Responses to object approach by a wide field visual neurone, the LGMD2 of the locust: Characterization and image cues
The LGMD2 is not excited by the approach of light objects; it specifically responds to movement of edges in the light to dark direction, and both neurones rely on the same monocular image cues to distinguish approaching from receding objects.
Local circuit for the computation of object approach by an identified visual neuron in the locust
It is proposed that these retinotopic units excite the LGMD, but inhibit each other; and that the synapses form the substrate for a critical race between excitation caused by edges moving out over successive photoreceptors, and inhibition spreading laterally, which results in the selective response to objects approaching on a collision course.
The Tymbal Mechanism and Song Patterns of the Bladder Cicada, Cystosoma Saundersii
1. In Cystosoma saundersii sound is generated by collapse of a pair of tymbals and radiated by a large, resonant, air-filled abdomen. Each tymbal comprises a flexible, biconvex membrane bearing seven…