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Related Concept Videos

Somatosensation01:33

Somatosensation

45.6K
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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Sensory Functions of the Skin01:16

Sensory Functions of the Skin

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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
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Piaget's Stage 1 of Cognitive Development01:14

Piaget's Stage 1 of Cognitive Development

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The sensorimotor stage, the initial phase of Jean Piaget's theory of cognitive development, spans the first two years of a child's life. During this period, infants actively engage with their surroundings, building cognitive awareness through direct interaction with the world. This interaction is primarily based on sensory perception and motor actions, allowing infants to gradually understand basic physical properties and predict how objects interact within their environment.
Exploration...
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Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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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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The Nativist Approach01:21

The Nativist Approach

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The nativist approach to infant cognitive development proposes that infants are born with inherent knowledge structures that allow them to interpret the world almost immediately. This perspective contrasts with earlier developmental theories, such as those proposed by Jean Piaget, which emphasized a more gradual acquisition of cognitive abilities through interaction with the environment. One key concept in this approach is object permanence — the understanding that objects continue to...
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Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

12.5K
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...
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Related Experiment Video

Updated: Mar 31, 2026

Quantitative Assessment of Cortical Auditory-tactile Processing in Children with Disabilities
09:38

Quantitative Assessment of Cortical Auditory-tactile Processing in Children with Disabilities

Published on: January 29, 2014

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Human infants' ability to perceive touch in external space develops postnatally.

Jannath Begum Ali1, Charles Spence2, Andrew J Bremner3

  • 1Sensorimotor Development Research Unit, Department of Psychology, Goldsmiths University of London, London, SE14 6NW, UK; Centre for Brain and Cognitive Development, Department of Psychological Sciences, Birkbeck University of London, WC1E 7HX, UK.

Current Biology : CB
|October 21, 2015
PubMed
Summary
This summary is machine-generated.

Newborn infants initially perceive touch solipsistically. By six months, they develop external spatial coding for touch, showing deficits when feet are crossed, unlike four-month-olds.

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Area of Science:

  • Developmental psychology
  • Neuroscience
  • Sensory processing

Background:

  • Infants must integrate tactile sensations with external sensory information (vision, hearing, olfaction).
  • Adults exhibit tactile localization errors when limbs are crossed due to conflicting spatial frames of reference.

Discussion:

  • Six-month-olds, like adults, show tactile localization deficits with crossed feet, indicating external spatial coding.
  • Four-month-olds do not exhibit this deficit, suggesting a developmental shift in tactile perception.

Key Insights:

  • Early infancy (four months) is characterized by solipsistic tactile perception.
  • External spatial coding of touch develops postnatally, emerging between four and six months of age.

Outlook:

  • Further research can explore the neural mechanisms underlying this developmental transition.
  • Understanding this process is crucial for developmental milestones and sensory integration studies.