Electrophysiological activity of a neurotoxic fraction from the venom of box jellyfish Carybdea marsupialis

2017 ◽  
Vol 191 ◽  
pp. 177-182 ◽  
Author(s):  
Fernando Lazcano-Pérez ◽  
Rogelio O. Arellano ◽  
Edith Garay ◽  
Roberto Arreguín-Espinosa ◽  
Judith Sánchez-Rodríguez
Keyword(s):  
Box Jellyfish ◽  
Electrophysiological Activity ◽  
Carybdea Marsupialis

scholarly journals Use of an Inverse Method for Time Series to Estimate the Dynamics of and Management Strategies for the Box Jellyfish Carybdea marsupialis

PLoS ONE ◽  
2015 ◽  
Vol 10 (9) ◽  
pp. e0137272 ◽  
Author(s):  
Cesar Bordehore ◽  
Verónica L. Fuentes ◽  
Jose G. Segarra ◽  
Melisa Acevedo ◽  
Antonio Canepa ◽  
...  
Keyword(s):  
Time Series ◽  
Inverse Method ◽  
Management Strategies ◽  
Box Jellyfish ◽  
Carybdea Marsupialis

scholarly journals Eye development in the box jellyfish Carybdea marsupialis

2011 ◽  
Vol 356 (1) ◽  
pp. 160-161
Author(s):  
Jenna Valley ◽  
Vicki Martin
Keyword(s):  
Eye Development ◽  
Box Jellyfish ◽  
Carybdea Marsupialis

Partial purification and characterization of a novel neurotoxin and three cytolysins from box jellyfish (Carybdea marsupialis) nematocyst venom

2005 ◽  
Vol 80 (3) ◽  
pp. 163-168 ◽  
Author(s):  
J. Sánchez-Rodríguez ◽  
E. Torrens ◽  
L. Segura-Puertas
Keyword(s):  
Partial Purification ◽  
Purification And Characterization ◽  
Box Jellyfish ◽  
Carybdea Marsupialis

Complexity Measures of Brain Electrophysiological Activity

2010 ◽  
Vol 24 (2) ◽  
pp. 131-135 ◽  
Author(s):  
Włodzimierz Klonowski ◽  
Pawel Stepien ◽  
Robert Stepien
Keyword(s):  
Brain Activity ◽  
Deterministic Chaos ◽  
Epileptic Seizures ◽  
Eeg Signal ◽  
Eeg Signals ◽  
Complexity Measures ◽  
Electrophysiological Activity ◽  
Signal Complexity ◽  
Physiological Sleep ◽  
The Brain

Over 20 years ago, Watt and Hameroff (1987 ) suggested that consciousness may be described as a manifestation of deterministic chaos in the brain/mind. To analyze EEG-signal complexity, we used Higuchi’s fractal dimension in time domain and symbolic analysis methods. Our results of analysis of EEG-signals under anesthesia, during physiological sleep, and during epileptic seizures lead to a conclusion similar to that of Watt and Hameroff: Brain activity, measured by complexity of the EEG-signal, diminishes (becomes less chaotic) when consciousness is being “switched off”. So, consciousness may be described as a manifestation of deterministic chaos in the brain/mind.

Box jellyfish show a keen eye

Nature ◽  
2005 ◽  
Author(s):  
Michael Hopkin
Keyword(s):  
Box Jellyfish

Oxygen metabolism, electrophysiological activity and cerebral blood flow in rat sensory cortex

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S75-S75
Author(s):  
Pia Enager ◽  
Nikolas Offenhauser ◽  
Martin Lauritzen
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Oxygen Metabolism ◽  
Sensory Cortex ◽  
Electrophysiological Activity

Management of a major box jellyfish ( Chironex fleckeri ) sting: Lessons from the first minutes and hours

1992 ◽  
Vol 156 (9) ◽  
pp. 655-658 ◽  
Author(s):  
Christopher E Beadnell ◽  
Timothy A Rider ◽  
John A Williamson ◽  
Peter J Fenner
Keyword(s):  
Box Jellyfish ◽  
Chironex Fleckeri

scholarly journals Neurovascular coupling during optogenetic functional activation: Local and remote stimulus-response characteristics, and uncoupling by spreading depression

2019 ◽  
Vol 40 (4) ◽  
pp. 808-822 ◽  
Author(s):  
Maximilian Böhm ◽  
David Y Chung ◽  
Carlos A Gómez ◽  
Tao Qin ◽  
Tsubasa Takizawa ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Spreading Depression ◽  
Barrel Cortex ◽  
Disease Process ◽  
Neurovascular Coupling ◽  
Laser Speckle ◽  
Cortical Activation ◽  
Somatosensory Stimulation ◽  
Response Characteristics ◽  
Electrophysiological Activity

Neurovascular coupling is a fundamental response that links activity to perfusion. Traditional paradigms of neurovascular coupling utilize somatosensory stimulation to activate the primary sensory cortex through subcortical relays. Therefore, examination of neurovascular coupling in disease models can be confounded if the disease process affects these multisynaptic pathways. Optogenetic stimulation is an alternative to directly activate neurons, bypassing the subcortical relays. We employed minimally invasive optogenetic cortical activation through intact skull in Thy1-channelrhodopsin-2 transgenic mice, examined the blood flow changes using laser speckle imaging, and related these to evoked electrophysiological activity. Our data show that optogenetic activation of barrel cortex triggers intensity- and frequency-dependent hyperemia both locally within the barrel cortex (>50% CBF increase), and remotely within the ipsilateral motor cortex (>30% CBF increase). Intriguingly, activation of the barrel cortex causes a small (∼10%) but reproducible hypoperfusion within the contralateral barrel cortex, electrophysiologically linked to transhemispheric inhibition. Cortical spreading depression, known to cause neurovascular uncoupling, diminishes optogenetic hyperemia by more than 50% for up to an hour despite rapid recovery of evoked electrophysiological activity, recapitulating a unique feature of physiological neurovascular coupling. Altogether, these data establish a minimally invasive paradigm to investigate neurovascular coupling for longitudinal characterization of cerebrovascular pathologies.

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