Controlled study of the galvanic skin response (GSR) in ten psoriasis subjects has shown an increased skin resistance and a decreased reactivity to certain sweat stimulating and sweat inhibiting drugs.
DANIEL J. PERRY, GEORGE E. MOUNT, EDWIN T. WRIGHT. Study of Galvanic Skin Response in Psoriasis. Arch Dermatol. 1963;88(1):32–37. doi:10.1001/archderm.1963.01590190038004