... or financial interests. 3 2 2022 28 4 2022 © 2022. Published by The Company of Biologists Ltd 2022 Summary: A short-term cold stress improves visual neural performance in locusts by increasing activity of the sodium pump in the CNS. Insect Locust RCH DCMD Octopamine Na...

..., injection of a D2 receptor antagonist prohibited the onset of a ‘winner’ effect in dominant animals, suggesting that the facilitating effect of dopamine on small animals is mediated by D2 receptors. Since the inhibitory effect of 1 μmol l −1 dopamine was similar to that seen with 1 μmol l −1 octopamine...

.... In principle, we can reduce stress-induced declines in colony health by either removing the stressor or increasing the bees' tolerance to the stressor. This latter option requires a better understanding than we currently have of how honey bees respond to stress. Here, we investigated how octopamine, a stress...

... discrimination approach with selective pharmacological injections to evaluate the effect of dopamine and octopamine in appetitive visual learning. Both octopaminergic and dopaminergic antagonists impaired visual discrimination performance, suggesting that both these biogenic amines modulate appetitive visual...

...-1/ 9 6 2017 9 10 2017 Competing interests The authors declare no competing or financial interests. * Author for correspondence ( martin.schwaerzel@fu-berlin.de ) Cardiovascular disease Cardiovascular model Cardiotropic effect Adrenergic system Octopamine...

... fanning behavior in honeybees. Concentrations of two biogenic amines, octopamine and tyramine, are significantly lower in active fanners than in non-fanners, but there is no difference in dopamine and serotonin concentrations. Direct feeding of octopamine and tyramine induced a decrease in fanning...

... development time and increased the concentration of the stress neurohormone octopamine. It had no significant effect on haemocyte number, melanization rate, phenoloxidase activity, lysozyme-like activity or nodule production. Predator stress reduced haemolymph glutathione concentrations. It also increased...

... floridanus actively seeks and self-administers morphine even in the absence of caloric value or additional natural reward. Using HPLC equipped with electrochemical detection, the neurochemicals serotonin, octopamine and dopamine were identified and subsequently quantified, establishing the concurrent...

...Floris van Breugel; Marie P. Suver; Michael H. Dickinson Recent evidence suggests that flies' sensitivity to large-field optic flow is increased by the release of octopamine during flight. This increase in gain presumably enhances visually mediated behaviors such as the active regulation of forward...

.... Exposure to elevated levels of octopamine via feeding, injection or bathing of the isolated light organ indicates that it is involved in the regulation of repression. Administration of the octopamine antagonists phentolamine or mianserin results in very high bioluminescence output levels, similar...

... prolixus , had no statistically significant effect on tick cuticle. Octopamine (OA) and tyramine both caused cuticle stiffening (i.e. opposed plasticization). This suggests a possible inhibitory effect but co-injection of OA with DA did not reduce DA-induced plasticization. The mechanism leading...

... such as biogenic amines. To test our hypothesis, we studied the effects of octopamine (OA) and serotonin (5-hydroxytryptamine, 5-HT) on the coding properties of pheromone-sensitive AL neurons in virgin and newly mated males. We show that AL neuron sensitivity increased in newly mated males after injection of OA...

...Christian Flecke; Andreas Nolte; Monika Stengl SUMMARY Octopamine causes time-dependent disadaptation of pheromone-sensitive olfactory receptor neurons (ORNs) of Manduca sexta . Because the majority of insect octopamine receptors are positively coupled to adenylyl cyclases we examined whether...

... transitions caused by bath-application of carbachol or octopamine (OA). Spontaneous transitions from silence to activity were marked by the appearance of a standing inward current and periodic outward currents in both types of motor neurons. Bath-application of carbachol also led to the development...

... cocaine Apis mellifera reinforcement dance language drug abuse dopamine octopamine Cocaine is a neurotoxin that protects the coca plant ( Erythroxylem spp.) from herbivory by critically disrupting insect motor control( Nathanson et al., 1993 ). In humans, cocaine is also highly toxic...

...Edgar Buhl; Klaus Schildberger; Paul A. Stevenson SUMMARY A central question in behavioural control is how central pattern generators(CPGs) for locomotion are activated. This paper disputes the key role generally accredited to octopamine in activating the CPG for insect flight. In deafferented...

... the effect of an octopamine receptor agonist and an antagonist on the locomotor behavior of stung and control cockroaches. We show that in cockroaches stung by a wasp the octopamine receptor agonist chlordimeform induces a significant increase in spontaneous walking. In good agreement, in control individuals...

... (DATs) and norepinephrine (NETs). An additional SLC6 monoamine transporter (OAT), is responsible for the selective uptake of the phenolamines octopamine and tyramine by insect neurons. We have characterized a similar high-affinity phenoloamine transporter expressed in the CNS of the earthworm Lumbricus...

...Herman K. Lehman; David J. Schulz; Andrew B. Barron; Lydia Wraight; Chris Hardison; Sandra Whitney; Hideaki Takeuchi; Rajib K. Paul; Gene E. Robinson SUMMARY The biogenic amine octopamine (OA) is involved in the regulation of honey bee behavioral development; brain levels are higher in foragers...

... intracellular recordings from identified command-like brain interneurons demonstrated that 5-HT, especially in combination with octopamine, inhibited swim-triggering neuron Tr1, as well as swim-inactivating neurons Tr2 and SIN1. Although 5-HT inhibited elements of the swim-inactivation pathway, rather than...