Signals in Biology refer to an electric quantity (voltage or current or field strength) whose modulation represents coded information about the biological source from which it comes, and are also known as Biopotentials. Main articles: Life All organisms (viruses not included) consist of cells, which in turn, are based on a common carbon-based biochemistry. ... The article on electrical energy is located elsewhere. ...

This ionic transport within and along the excitable fibers (like nerve or muscle, including heart muscles) can be measured on the surface of the skin using a specific type of electrochemical sensor commonly referred to as the surface recording electrode (sometimes just called the electrode). A nerve is an enclosed, cable-like bundle of nerve fibers or axons, which includes the glia that ensheath the axons in myelin. ... A top-down view of skeletal muscle Muscle is a contractile form of tissue. ... The heart and lungs (from an older edition of Grays Anatomy) The heart (Latin cor) is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. ...

The purpose of the electrode is to act as a transducer between the ionic transport of the cell and the electron flow in the connecting metal wire. It is the junction between the electrode and the electrolyte (paste or gel made up of silver-silver chloride) that allows such a transduction to take place. An electrode is a conductor used to make contact with a nonmetallic part of a circuit (e. ... A transducer is a device that converts one type of energy to another, or responds to a physical parameter. ...

The signals coming from the heart are called ECG waves, while that from the heart are called EEG waves. Similarly, fron the muscles Electromyogram, from the eyes Electrooculogram, from retina Electroretinogram, from the cerebral cortex Electrocorticogram may also be recorded. ECG may also refer to the East Coast Greenway Lead II An Electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm) is a graphic produced by an electrocardiograph, which records the electrical voltage in the heart in the form of a continuous strip graph. ... Electroencephalography is the neurophysiologic measurement of the electrical activity of the brain by recording from electrodes placed on the scalp, or in the special cases on the cortex. ... Electromyography (EMG) is a medical technique for measuring muscle response to nervous stimulation. ... Electroretinography, is used to measure the electrical responses of various cell types in the retina, including the light-sensitive cells (rods and cones) and the ganglion cells. ... Cerebral cortex - Wikipedia, the free encyclopedia /**/ @import /skins-1. ...

These form intergral part of the armoury in Electrophysiology studies and Biofeedback experiments. Electrophysiology is the science and branch of physiology that pertains to the flow of ions in biological tissues and, in particular, to the electrical recording techniques that enable the measurement of this flow and the potential changes related to them. ... This article needs to be cleaned up to conform to a higher standard of quality. ...

Also see

• Bioelectromagnetism