Definitions for "Hyperpolarization"
A change in membrane potential in the negative direction, making the cell interior more negative.
increase in the internal negativity across a cell membrane, thus increasing the voltage and moving it farther away from the threshold value
A mechanism by which a membrane potential is made more negative inside with respect to the outside of the cell. Hyperpolarization causes neurons and muscle cells to be electrically silent (see action potentials) and stabilize at a resting potential. Hyperpolarization is the result of moving positive charges from in to out of a cell which is usually the result of K+ ions moving out, but can also be achieved by moving Cl- ions into the cell.