Electromytography Flashcards
1
Q
What is EMG?
A
Electro (electric), Myo (Muscle), Graphy (Graph). It is the study of muscle function through the inquiry of the electrical signal the muscles emanate
2
Q
Describe the graph of a fast twitch fibre
A
Gradual muscle force increase, loads of action potentials
3
Q
What are the intrinsic factors affecting EMG?
A
Number of active motor units Blood Flow Fiber Diameter Motor unit firing rate Subcutaneous tissue Fibre type Lactic acid Motor points
4
Q
What are the extrinsic factors affecting EMG?
A
50/50Hz noise Skin impedance Sampling rates Sensor bandwidth Signal resolution Movement artifact Sensor location Muscle crosstalk
5
Q
What are the applications of EMG?
A
Sports performance Exercise physiology Motor control Rehabilitation Animal research Neuromuscular disease
6
Q
How does EMG analysis link to muscle effort?
A
Increase force applied = increase in EMG signal (not linear)
7
Q
What is Kinesiology?
A
Scientific study of human and non human body movement
