Description of Physiology • Physiology is the science of the mechanical, physical, and biochemical functions of the human body in good health. • This allows us to learn more about us humans and the way we work.
How the Body Works The brain is the control center of the body. It sends electrical signals down the spinal cord and to various parts of the body.
Body (Cont.) • These signals are passed to the muscles by neurons (a cell in nerves) from the brain. • The body moves because of the electric signals transmitted from the brain to nerves that in effect, creates a magnetic field around a joint. • The process creates a motor to turn the joint or limb to create movement.
Relevance to this Project • Electromyography is the method of measuring the electric signals in the muscles. An electromyogram measures those signals that the muscles amplify. This gives us an idea of the physical capabilities of a person.
How EMG Works • Measures electric activity in your muscles. • Amplify signals • Filters signals • Shows up as a graph
Prosthetic Arms • “What could help more, he and others at RIC think, is the kind of prosthesis Amanda Kitts has volunteered to test—one controlled by the brain, not by body parts that normally have nothing to do with moving the hand. A technique called targeted muscle reinnervation uses nerves remaining after an amputation to control an artificial limb.”
The Connection • Signals can go from an amputee’s stump to brain • Computers can control motors to move limbs in prosthesis • Cannot be connected because nerves and metal don’t get along • Amplifier would avoid need to make direct contact between wire and nerves • Muscles give large enough electric charge to be detected by an electrode • An operation was used to reroute severed nerves to other muscles to supply a good electric boost
Sources Used • http://ngm.nationalgeographic.com/2010/01/bionics/fischman-text/4 • Packets • RIC Presentations