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Related Concept Videos

Diencephalon: Thalamus and Information Relay01:27

Diencephalon: Thalamus and Information Relay

The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological states or needs.
Diencephalon: Anatomical Regions01:30

Diencephalon: Anatomical Regions

The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the subthalamic...
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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...
Pain01:20

Pain

Pain serves as a critical warning signal that alerts the body to potential or actual harm. When mechanical pressure on the skin is intense, such as from a sharp pinch, the sensation transitions from touch to pain. Similarly, extreme temperatures, like a hot pot handle, convert the sensation of heat into pain. Pain can also result from overstimulation of other senses, such as blinding light, loud noise, or the intense heat from habañero peppers. This ability to sense pain is essential for...
Nociception01:44

Nociception

Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain. Thus, pain helps the...
Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the posterior columns...

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3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
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Published on: June 2, 2014

Thalamus and pain.

Chen-Tung Yen1, Pen-Li Lu

  • 1Institute of Zoology, National Taiwan University, Taipei, Taiwan. ctyen@ntu.edu.tw

Acta Anaesthesiologica Taiwanica : Official Journal of the Taiwan Society of Anesthesiologists
|August 24, 2013
PubMed
Summary
This summary is machine-generated.

The thalamus relays pain signals to the brain. Research suggests this brain region is crucial for pain consciousness and understanding chronic pain conditions.

Keywords:
cerebral cortexpain: neuropathicpain: thalamicthalamus

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Area of Science:

  • Neuroscience
  • Pain Research
  • Cerebral Cortex Studies

Background:

  • The thalamus acts as a critical relay for nociceptive information to the cerebral cortex.
  • Understanding the thalamus's role is vital for addressing acute and chronic pain.
  • Its connections and responsiveness to pain stimuli are key areas of investigation.

Purpose of the Study:

  • To review existing research on the thalamus's involvement in pain.
  • To explore the thalamus's function in both acute and chronic pain states.
  • To propose future research directions for thalamic pain studies.

Main Methods:

  • Review of input-output connectivity studies.
  • Analysis of functional imaging data.
  • Examination of direct neuronal recording, stimulation, and lesioning studies.

Main Results:

  • The thalamus exhibits strong nociceptive responsiveness.
  • Reciprocal connections between the thalamus and cerebral cortex are significant.
  • Thalamic damage is associated with severe chronic pain.

Conclusions:

  • The thalamus is a key player in pain consciousness.
  • It may hold the key to understanding spontaneous and evoked pain in chronic conditions.
  • Further research is needed to fully elucidate its role in pain processing.