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Related Concept Videos

Somatosensation01:33

Somatosensation

37.0K
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

10.0K
Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
10.0K
Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

3.2K
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...
3.2K
Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

8.4K
The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
8.4K
Propagation of Action Potentials01:23

Propagation of Action Potentials

15.5K
The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
15.5K
Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

5.1K
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Related Experiment Video

Updated: May 7, 2026

Somatosensory Event-related Potentials from Orofacial Skin Stretch Stimulation
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Somatosensory Event-related Potentials from Orofacial Skin Stretch Stimulation

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Common spatial patterns for steady-state somatosensory evoked potentials.

Yunjun Nam, Andrzej Cichocki, Seungjin Choi

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |October 11, 2013
    PubMed
    Summary

    This study enhances brain-computer interfaces (BCIs) by incorporating spatial information into steady-state somatosensory evoked potential (SSSEP) analysis. Applying common spatial pattern (CSP) methods improved SSSEP BCI performance by 5%.

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    Area of Science:

    • Neuroscience
    • Biomedical Engineering
    • Signal Processing

    Background:

    • Steady-state somatosensory evoked potential (SSSEP) is a brain-computer interface (BCI) paradigm utilizing tactile stimulation frequency.
    • Previous SSSEP BCI research primarily focused on frequency information, neglecting spatial aspects of the somatosensory cortex.

    Purpose of the Study:

    • To investigate the utility of spatial information in SSSEP BCI.
    • To adapt the common spatial pattern (CSP) method, typically used in motor imagery BCI, for SSSEP analysis.

    Main Methods:

    • Applied two common spatial pattern (CSP) methods to extract spatial features from SSSEP signals.
    • Analyzed SSSEP data across different frequency bands.

    Main Results:

    • The integration of CSP methods demonstrated a performance improvement in SSSEP BCI.
    • The SSSEP BCI accuracy increased from 70% to 75% with the proposed spatial feature extraction approach.

    Conclusions:

    • Spatial information, when analyzed using CSP methods, significantly enhances SSSEP BCI performance.
    • This study highlights the potential of leveraging spatial features for more effective SSSEP-based brain-computer interfaces.