If you are keen for your baby to be introduced to swimming before he is six weeks old your partner, or someone else, can take him. Some private baby swim classes start as early as four weeks but most classes at public pools begin at around 4 months.
Electrocardiogram (EKG, ECG) General Description. As the heart undergoes depolarization and repolarization, the electrical currents that are generated spread not only within the heart, but also throughout the body. This electrical activity generated by the heart can be measured by an array of electrodes placed on the body surface.
hyperpolarization. A change in the value of the resting membrane potential towards a more negative value. The inside of the cell becomes more negative than the outside. Hyperpolarization is inhibitory because the membrane potential moves away from the neuron's threshold at which an action potential could occur.Example: the retinal photoreceptor potentials when stimulated by light.See depolarization; receptor potential; resting membrane potential; synapse.yperpolarization. any increase in the amount of electrical charge separated by the cell membrane and hence in the strength of the membrane potential. In cardiology this is the process by which an electrical fiber, at the end of phase 3 repolarization, becomes more negative than usual. (hÄ«'pÄr-pÅ'lÄr-i-zÄ'shÅ­n),