Cardiovascular component of the context signal memory in the crab Chasmagnathus

Hermitte, Gabriela; Maldonado, Héctor

doi:10.1007/s00359-005-0052-y

Cited by 19 publications

(20 citation statements)

References 57 publications

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“…This is also the first study to show context-dependent conditioning of autonomic function in invertebrates. Previous studies on this subject in invertebrates have been confined to habituation of the heart rate (in the blowfly Calliphora vomitoria; Thon, 1980), 12 sensitization of the heart rate (in Aplysia; Krontiris-Litowitz, 1999), and conditioning of the heart rate according to context that can be characterized as a form of elemental associative learning between the context stimulus and aversive US (in crabs, Chasmagnathus; Hermitte & Maldonado, 2006). This study shows that context-dependent learning with the use of visual context, olfactory CS and gustatory US can be achieved not only in freely behaving cockroaches (Sato et al, 2006), but also in highly restrained cockroaches.…”

Section: Discussionmentioning

confidence: 99%

Context-dependent olfactory learning monitored by activities of salivary neurons in cockroaches

Matsumoto¹,

Matsumoto²,

Watanabe³

et al. 2012

Neurobiology of Learning and Memory

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Context-dependent discrimination learning, a sophisticated form of nonelemental associative learning, has been found in many animals, including insects. The major purpose of this research is to establish a method for monitoring this form of nonelemental learning in rigidly restrained insects for investigation of underlying neural mechanisms. We report context-dependent olfactory learning (occasion-setting problem solving) of salivation, which can be monitored as activity changes of salivary neurons in immobilized cockroaches, Periplaneta americana. A group of cockroaches was trained to associate peppermint odor (conditioned stimulus, CS) with sucrose solution reward (unconditioned stimulus, US) while vanilla odor was presented alone without pairing with the US under a flickering light condition (1.0 Hz) and also trained to associate vanilla odor with sucrose reward while peppermint odor was presented alone under a steady light condition. After training, the responses of salivary neurons to the rewarded peppermint odor were significantly greater than those to the unrewarded vanilla odor under steady illumination and those to the rewarded vanilla odor was significantly greater than those to the unrewarded peppermint odor in the presence of flickering light.Similar context-dependent responses were observed in another group of cockroaches trained with the opposite stimulus arrangement. This study demonstrates context-dependent olfactory learning of salivation for the first time in any vertebrate and invertebrate species, which can be monitored by activity changes of salivary neurons in restrained cockroaches.

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Section: Discussionmentioning

confidence: 99%

Context-dependent olfactory learning monitored by activities of salivary neurons in cockroaches

Matsumoto¹,

Matsumoto²,

Watanabe³

et al. 2012

Neurobiology of Learning and Memory

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“…Furthermore, our own work in Chasmagnathus shows that upon the sudden presentation of a rectangular screen passing above the animal, the visual danger stimulus (VDS), the crab responds with a running reaction in an attempt to escape (Maldonado, 2002), while a cardiac response is also elicited by the same stimulus (Hermitte and Maldonado, 2006). Consequently, the effect of presenting a VDS as a visual cue was further explored.…”

Section: Introductionmentioning

confidence: 99%

“…The ability to escape predation or to be alerted to subtle changes in the environment in relation to autonomic control is associated with the complex ability to integrate sensory information as well as motor output to target tissues. Very few previous studies have investigated the simultaneous occurrence of autonomic and somatic responses in invertebrates (Hermitte and Maldonado, 2006). Thus, a broader objective was to further investigate how these more integrated strategies work in invertebrates.…”

Section: Introductionmentioning

confidence: 99%

The cardiac response of the crabChasmagnathus granulatusas an index of sensory perception

Burnovicz

Oliva

Hermitte

2009

Journal of Experimental Biology

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SUMMARYWhen an animalʼs observable behavior remains unaltered, one can be misled in determining whether it is able to sense an environmental cue. By measuring an index of the internal state, additional information about perception may be obtained. We studied the cardiac response of the crab Chasmagnathus to different stimulus modalities: a light pulse, an air puff, virtual looming stimuli and a real visual danger stimulus. The first two did not trigger observable behavior, but the last two elicited a clear escape response. We examined the changes in heart rate upon sensory stimulation. Cardiac response and escape response latencies were also measured and compared during looming stimuli presentation. The cardiac parameters analyzed revealed significant changes (cardio-inhibitory responses) to all the stimuli investigated. We found a clear correlation between escape and cardiac response latencies to different looming stimuli. This study proved useful to examine the perceptual capacity independently of behavior. In addition, the correlation found between escape and cardiac responses support previous results which showed that in the face of impending danger the crab triggers several coordinated defensive reactions. The ability to escape predation or to be alerted to subtle changes in the environment in relation to autonomic control is associated with the complex ability to integrate sensory information as well as motor output to target tissues. This ʻfear, fight or flightʼ response gives support to the idea of an autonomic-like reflexive control in crustaceans.

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“…20 mediated by GABA as Picrotoxin, a non competitive GABAergic antagonist, partially abolished the CIR already described in this decapod (Hermitte and Maldonado, 2006;Burnovicz et al, 2009;Burnovicz and Hermitte, 2010).…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 63%

“…CIR has been associated both with attentional phenomena in vertebrates (Powell, 1994) and with the orienting response in invertebrates (Shuranova and Burmistrov, 1996). In addition, CIR has been described as a component of the "death-feigning behavior" in decapod crustaceans (McMahon and Wilkens, 1972) and as an index of sensory perception and evidence of a neuroautonomic response in the crab Neohelice granulata (Hermitte and Maldonado, 2006;Burnovicz et al, 2009;Burnovicz and Hermitte, 2010). In any case, its prevalence across invertebrates and vertebrates leads to the assumption that it has a universally adaptive function.…”

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confidence: 99%

Characterization of the cardiac ganglion in the crab Neohelice granulata and immunohistochemical evidence of GABA-like extrinsic regulation

Yang

Carbó-Tano

Freudenthal

et al. 2013

Arthropod Structure & Development

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Please cite this article as: Yang,, M., Carbó Tano,, M., Freudenthal,, R., Hermitte,, G., Characterization of the cardiac ganglion in the crab Neohelice granulata and immunohistochemical evidence of GABAlike extrinsic regulation, Arthropod Structure and Development (2012), doi: 10.1016/j.asd.2012 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ABSTRACTThe aim of the present work is to provide an anatomical description of the cardiac system in the crab Neohelice granulata and evidence of the presence of GABA by means of immunohistochemistry. The ganglionic trunk was found lying on the inner surface of the heart's dorsal wall. After dissection, this structure appeared as a Y-shaped figure with its major axis perpendicular to the major axis of the heart. Inside the cardiac ganglion, we identified four large neurons of 63.7 µm ± 3.7 in maximum diameter, which were similar to the motor neurons described in other decapods. All the GABA-like immunoreactivity (GABAi) was observed as processes entering mainly the ganglionic trunk and branching in slender varicose fibers, forming a network around the large neurons suggesting that GABAi processes contact them.Our findings strengthen previous results suggesting that the GABAergic system mediates the cardioinhibitory response upon sensory stimulation.

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Cardiovascular component of the context signal memory in the crab Chasmagnathus

Cited by 19 publications

References 57 publications

Context-dependent olfactory learning monitored by activities of salivary neurons in cockroaches

Context-dependent olfactory learning monitored by activities of salivary neurons in cockroaches

The cardiac response of the crabChasmagnathus granulatusas an index of sensory perception

Characterization of the cardiac ganglion in the crab Neohelice granulata and immunohistochemical evidence of GABA-like extrinsic regulation

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