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Related Concept Videos

Somatosensation01:33

Somatosensation

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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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Tactile and Chemical Senses01:27

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Sensory Modalities01:15

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Sensation typically is the process by which the sensory receptors and sense organs detect stimuli from the internal and external environment and transmit this information to the central nervous system for processing.
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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:
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Deindividuation00:57

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Deindividuation is a form of social influence on an individual’s behavior such that the individual engages in unusual or non-normal behavior while in a group setting. Why? Because in these group settings, the individual no longer sees themselves as an individual anymore, disinhibiting their behavior and personal restraint.
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Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive...
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Related Experiment Video

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Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Creating Objects and Object Categories for Studying Perception and Perceptual Learning

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Haptic Object Individuation.

Myrthe A Plaisier, Wouter M Bergmann Tiest, Astrid M L Kappers

    IEEE Transactions on Haptics
    |January 1, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Object individuation, the process of distinguishing separate items, is key in haptic perception. This study found that object size and shape heterogeneity do not influence how we individuate items during tactile exploration.

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    Area of Science:

    • Psychology
    • Haptic Perception
    • Human-Computer Interaction

    Background:

    • Item individuation is crucial for understanding tactile environments and designing user interfaces.
    • Distinguishing multiple objects from a single large one is a daily perceptual task.
    • The influence of object properties like size and shape on individuation remains unclear.

    Purpose of the Study:

    • To investigate how heterogeneity in object size and shape affects item individuation in haptic perception.
    • To determine if features used in object recognition play a role in distinguishing individual items within a grasp.

    Main Methods:

    • Participants grasped sets of homogeneous objects, then sets heterogeneous in size, and finally sets heterogeneous in shape.
    • Performance was measured by response times, error rates, and object handling efficiency in numerosity judgments.

    Main Results:

    • Numerosity judgments showed similar performance across experiments involving homogeneous, size-heterogeneous, and shape-heterogeneous object sets.
    • Response times, error rates, and object handling efficiency were not significantly affected by object heterogeneity.

    Conclusions:

    • Object individuation during haptic exploration is independent of size and shape features.
    • Tactile item individuation relies on mechanisms distinct from those used for object recognition based on size and shape.