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ELECTROMYOGRAPHY (EMG):
 

Electromyography (EMG)

Definition of EMG:

  • Electromyography is the study of muscle function through the inquiry of the electrical signal that the muscle emanates
Benefits of EMG:
  • Allows us to directly look into the muscle
  • Allows measurement of muscular performance
  • Helps in decision making both before and after surgery
  • Documents treatment and training regimes
  • Helps patients to ”find” and train their muscles
  • Allows analysis to improve sports activities
  • Detects muscle response in ergonomic studies
Some Questions
Question  - Is the muscle active ?
Answer – Yes/No and On/Off
Question is answered by observing raw EMG trace of any activity.
  • A healthy well organized muscle in regular conditions turns off if it is not needed anymore
  • If it still stays on, it is an indicator for active muscle spasm, reflex induced (e.g. pain), hyper tonus, joint instability or behavioral disuse
Question - How much is the muscle active?
  • On this question the EMG amplitude has to be calculated on a metric scale
  • Muscle Voluntary Contraction (MVC) must be determined
  • Can only be performed on a healthy structure
  • Performed against static resistance
  • This kind of evaluation is important to understand the effect of treatment and training exercises
  • Ergonomics may need to understand the neuromuscular demand of a given work activity
 EMG Graphs EMG Graphs

EMG DEVICES:

Neurotrac EMG Devices

NEUROTRAC EMG DEVICES

   

 Mega Biomonitor EMG

MEGA BIOMONITOR
EMG DEVICES

   

Kine Logo

Kine Wireless EMG 

KINE WIRELESS EMG