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Related Concept Videos

Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

11.0K
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...
11.0K
What is a Sensory System?01:31

What is a Sensory System?

100.7K
Sensory systems detect stimuli—such as light and sound waves—and transduce them into neural signals that can be interpreted by the nervous system. In addition to external stimuli detected by the senses, some sensory systems detect internal stimuli—such as the proprioceptors in muscles and tendons that send feedback about limb position.
100.7K
Somatosensation01:33

Somatosensation

43.0K
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.
43.0K
Introduction to Special Senses01:26

Introduction to Special Senses

7.3K
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...
7.3K
Sensory Modalities01:15

Sensory Modalities

3.7K
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.
General senses refer to the broad category of sensory information detected by receptors in the body and can be further grouped into somatic and visceral senses. Somatic sensations include touch, pressure, temperature, and pain and are essential for navigating our environment and...
3.7K
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

695
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.
695

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Related Experiment Video

Updated: Jan 11, 2026

Extracellular Multi-Unit Recording from the Olfactory Nerve of Teleosts
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Extracellular Multi-Unit Recording from the Olfactory Nerve of Teleosts

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Sensory perception in marine larvae.

Vengamanaidu Modepalli1

  • 1The Laboratory, Marine Biological Association of the UK, Citadel Hill, Plymouth, United Kingdom.

Advances in Marine Biology
|November 14, 2025
PubMed
Summary
This summary is machine-generated.

Marine invertebrate larvae settlement and metamorphosis are crucial life cycle stages. Understanding larval sensory abilities and neural control in early-branching metazoans like sponges and cnidarians reveals fundamental insights into evolution.

Keywords:
Apical organCiliated larvaeCnidariansNeurotransmitterSponges

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Area of Science:

  • Marine Biology
  • Developmental Biology
  • Evolutionary Biology

Background:

  • Sessile marine invertebrates depend on larval settlement for adult life.
  • This transition is a critical bottleneck influencing marine community structure, especially in coral reefs.
  • Larval settlement and metamorphosis involve complex sensory detection and neural activation.

Purpose of the Study:

  • To synthesize current knowledge on larval sensory abilities and settlement mechanisms.
  • To explore the role of neurotransmitter signaling and environmental cues in metamorphosis.
  • To investigate the evolution of intracellular pathways in early-branching metazoans.

Main Methods:

  • Review of recent studies on marine invertebrate model organisms.
  • Analysis of sensory abilities, neural control, and environmental influences.
  • Focus on early-branching metazoans: sponges (Porifera) and cnidarians.

Main Results:

  • Sponges, lacking true nervous systems, exhibit coordinated sensory responses.
  • Cnidarians provide insights into the early evolution of nervous systems.
  • Fundamental molecular elements of sensory functions predate neural complexity.

Conclusions:

  • Understanding larval settlement is key to marine invertebrate life cycles and community dynamics.
  • Early-branching metazoans offer unique models for studying the evolution of sensory and neural systems.
  • This research highlights the deep evolutionary roots of sensory mechanisms essential for marine life.