tests of cerebral lateralization. 1  sodium amytal test: anesthetize one hemisphere and check for language function. 2  dichotic listening test: report more digits heard by dominant half. 3  functional brain imaging: fMRI or PET used to see which half is active when performing a language test.
one of a large group of low-molecular-weight proteins secreted by various cell types and involved in cell-to-cell communication, coordinating antibody and T cell immune interactions, and amplifying immune reactivity. Cytokines include colony-stimulating factors, interferons, interleukins, and lymphokines, which are secreted by lymphocytes.
There are also a number of proteins that are produced by the immune cells that are released and serve to signal other cells in the body that something bad is happening. These include cytokines and chemokines. The Thyroid and the Immune System When a person catches a cold or the flu or develops an infection, his or her body has a system that allows the body to fight it off and allows it to return to full health.