Pityriasis 2026-10-31
A historical descriptive group of skin disorders with fine bran-like desquamation. Its former varieties do not constitute one modern disease.
Pityriasis versicolor 2026-10-31
A superficial skin condition associated with Malassezia overgrowth. It differs in transmission from dermatophyte ringworm.
Regulated physiological variable Created 2026-10-13 Updated 2026-10-20
A regulated physiological variable is a specified internal quantity whose departures elicit actions tending to restore an appropriate range. Examples include core body temperature, blood glucose concentration, blood pressure, and the pH and osmolality of extracellular fluid. Specify the compartment and readout: skin temperature and core body temperature are different quantities, and an insulin concentration is a regulatory message rather than the blood glucose it helps control.
Rubefacient 2026-10-31
A preparation causing redness of the skin, historically used for counterirritation.
Sarcoptes scabiei 2026-10-31
The itch mite. Human-infecting forms burrow in the superficial skin.
Skin conductance 2026-10-24
The electrical conductance of skin, often measured between two recording electrodes. Sweating changes the conductive properties of the skin. Baseline, movement and recording conditions must be considered before interpreting an event-related response as evidence about emotion.
Skin conductance response 2026-10-25
A transient change in electrical conductance of the skin, often used as an index of autonomic arousal. Electrode recordings provide a physiological response measure, not a direct reading of threat beliefs or diagnostic status.
Twelve resting volunteers wore a water-perfused suit. Tubes covered the torso, upper arms and legs; the right forearm remained uncovered for laser Doppler blood-flow measurement. Six thermocouples estimated mean skin temperature; a sublingual thermocouple measured oral temperature. A dry-air capsule measured local sweat output from outgoing air moisture. [ref]
After two control scans near skin temperature, the suit cooled and then warmed the skin. Mean oral temperature was during both cooling and early warming; mean skin readings were and . Cutaneous vascular conductance fell during cooling and rose during warming. The inference is that compensatory blood-flow responses can precede an appreciable internal temperature change. [ref]
Repeated baselines controlled comparison within participants; closed mouths reduced oral-probe cooling artifacts. A later control with reduced oral temperature was excluded. Oral temperature is a proxy, local flow is not whole-body heat transfer, and the fixed condition order leaves time effects possible. Brain imaging measured regional blood flow, not direct neuron firing or causal necessity. [ref]