Related Experiment Video
Updated: Jul 20, 2026

08:01
Cutaneous Surgical Denervation: A Method for Testing the Requirement for Nerves in Mouse Models of Skin Disease
Published on: June 26, 2016
Summary
Itch perception is linked to parasite and vector interactions, influencing host behavior and disease transmission. Understanding the physiology of itch is crucial for managing these vector-borne diseases.
Area of Science:
- Parasitology
- Medical Entomology
- Neuroscience
Background:
- Itch is a common sensation associated with parasitic infections and arthropod bites.
- Ectoparasites like scabies, lice, and fleas can induce itch, sometimes persisting even after parasite removal, leading to delusory parasitosis.
- Host grooming responses to itch impact vector feeding and parasite transmission dynamics.
Purpose of the Study:
- To explain the phenomenon of itch.
- To discuss the underlying physiology of itch perception.
- To provide background for future research on itch and vector-borne diseases.
Main Methods:
- Literature review and synthesis of existing knowledge on itch.
- Expert commentary by John Alexander, author of "Arthropods and Human Skin".
Main Results:
- Itch is a complex sensation triggered by various stimuli, including parasite penetration and arthropod feeding.
- The physiological mechanisms of itch perception are multifaceted, involving sensory neurons and central nervous system processing.
- Host responses to itch significantly influence parasite transmission cycles.
Conclusions:
- Itch plays a critical role in host-parasite and host-vector interactions.
- Further research into the physiology of itch is warranted to understand its impact on disease transmission.
- Understanding itch mechanisms can inform strategies for controlling vector-borne diseases.
Related Concept Videos
Thermosensation
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...
Sensory Functions of the Skin
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...
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...
Introduction to the Integumentary System
The integumentary system is the organ system that comprises the skin and its associated structures. It is the largest system in the human body and plays a crucial role in protecting and maintaining homeostasis. The integumentary system serves several functions including protection, regulation, sensation, and secretion.
The skin, which is the primary organ of the integumentary system, consists of three main layers: the epidermis, dermis, and hypodermis (subcutaneous tissue). The epidermis is the...
The skin, which is the primary organ of the integumentary system, consists of three main layers: the epidermis, dermis, and hypodermis (subcutaneous tissue). The epidermis is the...
Accessory Structures of the Skin: Hair and Hair Follicles
Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
Physiology of Smell and Olfactory Pathway
Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
The olfactory...
The olfactory...
The Physiology of Taste
The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the diffusion of...

