The control of nocifensive movements in the caterpillar .

In response to a noxious stimulus on the abdomen, caterpillars lunge their head towards the site of stimulation. This nocifensive 'strike' behavior is fast (∼0.5 s duration), targeted and usually unilateral.

Son preference, security concerns and crime against women: Expanding the public health discourse in India.

The phenomenon of son preference in India and the declining number of girls due to such a mindset has been an area of concern. While the Preconception and Prenatal Diagnostic Techniques Act and the Beti Bachao and Beti Padhao scheme have been the mainstay of the government's initiative to counter this reproductive injustice, recognizing son preference and crime against women as public health concern opens up a new vista to counter this injustice. This study has identified that the public health system needs to engage with the following aspects to counter the problem: counseling services to women and men around fertility choices; access/availability to contraceptive choices; engaging men and boys in developing a response against violence; gender-sensitive training and capacity building; access to sexual and reproductive rights awareness amongst girls, women, boys, and men; and health insurance for senior citizens.

Stepping pattern changes in the caterpillar : the effects of orientation and substrate.

Most animals can successfully travel across cluttered, uneven environments and cope with enormous changes in surface friction, deformability and stability. However, the mechanisms used to achieve such remarkable adaptability and robustness are not fully understood. Even more limited is the understanding of how soft, deformable animals such as tobacco hornworm (caterpillars) can control their movements as they navigate surfaces that have varying stiffness and are oriented at different angles.

Local and generalized sensitization of thermally evoked defensive behavior in caterpillars.

In addition to camouflage and chemical toxicity, many caterpillars defend themselves against predators with sudden sharp movements. For smaller species, these movements propel the body away from the threat, but in larger caterpillars, such as the tobacco hornworm, Manduca sexta, the movement is a defensive strike targeted to a noxious stimulus on the abdomen. Previously, strikes have been studied using mechanical stimulation like poking or pinching the insect, but such stimuli are hard to control.

The neuromechanics of proleg grip release.

Because soft animals are deformable, their locomotion is particularly affected by external forces and they are expected to face challenges controlling movements in different environments and orientations. We have used the caterpillar to study neuromechanical strategies of soft-bodied scansorial locomotion. locomotion critically depends on the timing of proleg grip release, which is mediated by the principal planta retractor muscle and its single motoneuron, PPR.

What makes eyespots intimidating-the importance of pairedness.

Background: Many butterflies possess striking structures called eyespots on their wings, and several studies have sought to understand the selective forces that have shaped their evolution. Work over the last decade has shown that a major function of eyespots is their ability to reduce predation by being intimidating to attacking predators. Two competing hypotheses seek to explain the cause of intimidation, one suggesting 'eye-mimicry' and the other their 'conspicuousness' as the reason.