Localization of [14C]DDT in the ventral nerve cord of the cockroach,Periplaneta americana (L.)

1987 ◽  
Vol 4 (3) ◽  
pp. 205-212 ◽  
Author(s):  
A. J. Elia ◽  
D. R. Gardner
Keyword(s):  
Nerve Cord ◽  
Ventral Nerve Cord ◽  
Periplaneta Americana

Visual and Multimodal Interneurones in the Ventral Nerve Cord of the Cockroach, Periplaneta Americana

1973 ◽  
Vol 59 (3) ◽  
pp. 675-696
Author(s):  
R. J. COOTER
Keyword(s):  
Nerve Cord ◽  
Ventral Nerve Cord ◽  
Tactile Stimulation ◽  
Periplaneta Americana ◽  
Compound Eye ◽  
Visual Stimulation ◽  
Contralateral Stimulation ◽  
Thoracic Nerve ◽  
General Properties ◽  
Stimulation Of

1. Visual and multimodal units were recorded from the thoracic nerve cord of the cockroach, Periplaneta americana, using glass microelectrodes. 2. Compound-eye units could be classified as ON-, OFF- or ON-OFF-units according to their response to visual stimulation. Some were multimodal, firing to both visual and tactile stimulation of the antennae. 3. Although some units were found to be either fired by ipsilateral or by contralateral stimulation only, others were fired by both types of stimulation, often in different ways. 4. Ocellar units were invariably OFF-units, mainly phasic, but one type showed tonic dark-firing in addition to the phasic OFF-burst. 5. The general properties of cockroach visual units are discussed and compared with those reported by other workers for different insects.

Release of Ach by slices of the ventral nerve cord of the cockroach Periplaneta americana

Toxicon ◽  
1996 ◽  
Vol 34 (1) ◽  
pp. 28
Author(s):  
A.M.C. Pimenta ◽  
C.R. Diniz ◽  
M.E. De Lima
Keyword(s):  
Nerve Cord ◽  
Ventral Nerve Cord ◽  
Periplaneta Americana

Peripheral control of responsiveness to auditory stimuli in giant fibres of crickets and cockroaches

1978 ◽  
Vol 72 (1) ◽  
pp. 153-164
Author(s):  
N. Orida ◽  
R. K. Josephson
Keyword(s):  
Nerve Cord ◽  
Ventral Nerve Cord ◽  
Periplaneta Americana ◽  
Acheta Domesticus ◽  
Auditory Stimuli ◽  
Descending Inhibition ◽  
Descending Influences ◽  
Giant Fibres ◽  
Recording Electrodes

Auditory stimuli initiate ascending activity in large fibres of the ventral nerve cord of the cricket, Acheta domesticus, and the cockroach, Periplaneta americana. This auditory responsiveness is reduced during locomotion. An earlier study concluded that the depression of responsiveness was mediated by descending inhibition. However, the auditory responsiveness is reduced during locomotion even after section of the ventral nerve cord anterior to the abdominal recording electrodes. Further, auditory responsiveness of isolated abdomens attached to intact animals is inhibited during locomotion of their hosts. Laminar wind streams over the cerci depress responsiveness to sound, but only at velocities markedly higher than those encountered by freely walking animals. Although the exact mechanism is not known, the depressed auditory responsiveness can occur independently of any descending influences.

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