Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

General Anesthesia: Overview01:24

General Anesthesia: Overview

Anesthesia is a medical procedure that uses drugs for CNS suppression to enable painless surgeries and procedures. The selection of anesthetics is influenced by their pharmacokinetic properties, side effects, and patient characteristics. Various types of anesthesia include general, local, regional, spinal, and inhalational.
General anesthesia induces unconsciousness in the whole body, while the others target specific areas or sensations. It is administered to minimize adverse effects, maintain...
Subconsciousness and No Awareness01:15

Subconsciousness and No Awareness

The concept of subconscious awareness refers to the processing of information below the level of conscious thought, which significantly influences both behaviors and decisions. It is also known as waking subconscious awareness. This complex level of cognition operates without the direct awareness of the individual, facilitating rapid and simultaneous handling of multiple information streams.
An illustrative example of subconscious processing is its role in problem-solving. Often, individuals...
Stages of General Anesthesia01:22

Stages of General Anesthesia

Various sedation levels offer significant advantages in facilitating procedural interventions for patients undergoing medical or invasive surgical procedures. These levels span from anxiolysis to general anesthesia, providing a spectrum of sedative effects to cater to specific patient needs. Anxiolysis reduces anxiety and is achieved through minimal sedation, enabling patients to remain awake and responsive while feeling more at ease during the procedure. This level can benefit minor...
Understanding Consciousness01:23

Understanding Consciousness

Consciousness can be defined as the state of being aware of and able to think about one's existence, sensations, and surroundings. It encompasses two major components: awareness and arousal. Awareness pertains to the recognition of environmental stimuli and internal states. At the same time, arousal refers to the physiological readiness to engage with these stimuli, which varies significantly between states like sleep and wakefulness.
Sleep, a crucial state, is characterized by reduced physical...
Altered States of Awareness01:06

Altered States of Awareness

Altered states of consciousness represent significant deviations from one's normal mental state. These deviations can range from subtle changes in awareness to profound transformations in perception, thought processes, and sensory experiences. Altered states of consciousness can be triggered by various factors, including drug use, meditation, hypnosis, illness, or even intense fatigue.
The ingestion of substances like stimulants or hallucinogens leads to chemical alterations in the brain that...
Inhalational Anesthetics: Overview01:20

Inhalational Anesthetics: Overview

Inhalation anesthetics are drugs that induce general anesthesia upon inhalation. They work by increasing the sensitivity of GABAA receptors or inhibiting NMDA receptors, leading to a decrease in central nervous system activity. The depth of anesthesia can be rapidly adjusted by changing the concentration of the inhaled gas. Some common examples of inhalational anesthetics include volatile liquids like isoflurane, desflurane, sevoflurane and gases like xenon and nitrous oxide. Isoflurane, a...

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Enhancement of sleep slow wave activity using transcranial electrical stimulation with temporal interference: an interim analysis of the STRENGTHEN study.

Communications medicine·2026
Same author

Reorganization of Human Brain Waves Across Diverse States of Consciousness.

bioRxiv : the preprint server for biology·2026
Same author

Induction of cortical on/off periods in awake mice fulfills sleep functions.

Nature neuroscience·2026
Same author

Integrated information and predictive processing theories of consciousness: An adversarial collaborative review.

Neuroscience and biobehavioral reviews·2026
Same author

Interoception in normative development and the drive toward agency: Relevance for understanding aspects of schizophrenia.

Neuroscience and biobehavioral reviews·2026
Same author

Intrinsic Cause-Effect Power: The Tradeoff Between Differentiation and Specification.

Entropy (Basel, Switzerland)·2026

Video Experimental Relacionado

Updated: Jun 28, 2026

Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers
14:52

Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers

Published on: January 13, 2018

Conciencia y anestesia.

Michael T Alkire1, Anthony G Hudetz, Giulio Tononi

  • 1Department of Anesthesiology and the Center for the Neurobiology of Learning and Memory, University of California, Irvine, CA 92868, USA.

Science (New York, N.Y.)
|November 8, 2008
PubMed
Resumen
Este resumen es generado por máquina.

La anestesia no siempre puede causar pérdida de conciencia, pero sí induce falta de respuesta. La pérdida del conocimiento ocurre cuando los anestésicos bloquean el cerebro.

Más Videos Relacionados

Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics
08:16

Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics

Published on: July 23, 2020

Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
08:49

Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention

Published on: October 16, 2013

Videos de Experimentos Relacionados

Last Updated: Jun 28, 2026

Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers
14:52

Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers

Published on: January 13, 2018

Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics
08:16

Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics

Published on: July 23, 2020

Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
08:49

Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention

Published on: October 16, 2013

Área de la Ciencia:

  • La neurociencia es la neurociencia.
  • Anestesiología Anestesiología.
  • Ciencias Cognitivas Ciencias Cognitivas.

Sus antecedentes:

  • Se espera que la anestesia elimine la conciencia, pero sus efectos precisos siguen siendo objeto de debate.
  • Mientras que la anestesia induce falta de respuesta y amnesia, el grado de inconsciencia puede variar.
  • Las acciones anestésicas específicas en la corteza de la línea media del cerebro eliminan las respuestas conductuales sin necesariamente eliminar la conciencia.

Objetivo del estudio:

  • Investigar los mecanismos por los cuales la anestesia induce la inconsciencia.
  • Para determinar las regiones y procesos cerebrales específicos críticos para la pérdida de conciencia inducida por anestesia.
  • Para diferenciar entre la falta de respuesta y la verdadera inconsciencia bajo anestesia.

Principales métodos:

  • El estudio probablemente involucra el análisis de los efectos anestésicos en regiones específicas del cerebro, particularmente la corteza parietal posterior.
  • La desconexión funcional y la capacidad de integración de información en el cerebro se examinan bajo condiciones de anestesia.
  • La capacidad de respuesta conductual y la conciencia se evalúan a través de diversas medidas neurológicas y cognitivas.

Principales resultados:

  • La pérdida de conciencia inducida por anestesia está relacionada con la inactivación de un complejo de regiones cerebrales en el área parietal posterior.
  • La desconexión funcional dentro de este complejo posterior interrumpe la comunicación cortical y la integración de la información, lo que lleva a la pérdida de conciencia.
  • Los anestésicos que causan respuestas biestables y estereotipadas reducen la capacidad de información del cerebro, contribuyendo a la inconsciencia.

Conclusiones:

  • Los anestésicos causan inconsciencia principalmente al impedir que el cerebro integre la información.
  • La inactivación de las regiones cerebrales posteriores y la interrupción de la comunicación cortical son mecanismos clave que subyacen a la inconsciencia inducida por anestesia.
  • Comprender estos mecanismos es crucial para refinar las prácticas anestésicas y garantizar la seguridad del paciente.