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Videos de Conceptos Relacionados

Thermosensation01:43

Thermosensation

Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
Body Temperature01:25

Body Temperature

The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
Assessing Body Temperature - Temporal Artery01:19

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Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's forehead...
Functional Brain Systems: Reticular Formation01:13

Functional Brain Systems: Reticular Formation

The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
Body Temperature01:07

Body Temperature

Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C (97–99°F), remaining relatively stable...
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Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).

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Video Experimental Relacionado

Updated: Jun 25, 2026

A Simple One-step Dissection Protocol for Whole-mount Preparation of Adult Drosophila Brains
09:53

A Simple One-step Dissection Protocol for Whole-mount Preparation of Adult Drosophila Brains

Published on: December 1, 2016

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Representación de la temperatura en el cerebro de Drosophila.

Dominic D Frank1, Genevieve C Jouandet1, Patrick J Kearney1

  • 1Department of Neurobiology, Northwestern University, Evanston, Illinois 60208, USA.

Nature
|March 6, 2015
PubMed
Resumen

Las moscas de la fruta (Drosophila) procesan la información de temperatura utilizando un mapa cerebral sencillo. Este estudio revela cómo las diversas respuestas neuronales al calor y al frío permiten comportamientos complejos, incluida la evitación rápida.

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Last Updated: Jun 25, 2026

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Área de la Ciencia:

  • La neurociencia es la neurociencia.
  • Biología Sensorial Biología Sensorial
  • Comportamiento animal Comportamiento animal.

Sus antecedentes:

  • Drosophila detecta los cambios de temperatura periféricamente, creando un mapa sensorial básico en el cerebro.
  • Las moscas exhiben respuestas complejas a la temperatura, lo que sugiere un procesamiento sofisticado de información a partir de entradas simples.

Objetivo del estudio:

  • Para definir las bases anatómicas y fisiológicas de la representación de la temperatura en el cerebro de Drosophila.
  • Identificar las vías neuronales y los tipos de células implicadas en el procesamiento de la información térmica.

Principales métodos:

  • Técnicas de fotoetiquetado para rastrear conexiones neuronales desde la periferia termo-sensorial hasta los centros cerebrales superiores.
  • Imágenes de calcio in vivo para registrar la actividad neuronal en respuesta a estímulos térmicos.
  • Ensayos conductuales (preferencia de temperatura de dos opciones) para evaluar el papel de neuronas específicas.

Principales resultados:

  • La información termo sensorial converge en tres regiones cerebrales: cuerpo de hongo, cuerno lateral y protocerebro lateral posterior.
  • Se identificaron distintas poblaciones de neuronas de proyección termo-sensoriales: de adaptación rápida (seguimiento de cambios rápidos) y de adaptación lenta (magnitud de reflexión).
  • Una población de neuronas ampliamente sintonizadas, que responden tanto al calentamiento como al enfriamiento, es crucial para el comportamiento de evitación.

Conclusiones:

  • Un conjunto neuronal coordinado subyace a la representación y procesamiento de la temperatura en el cerebro de Drosophila.
  • Las neuronas térmicas ampliamente sintonizadas juegan un papel clave en las respuestas rápidas de evitación.
  • El estudio ilustra cómo la calidad del estímulo, la dinámica temporal y la intensidad se codifican a partir de un simple mapa sensorial.