Reassessing the principles of electrical stimulation

Area of Science:

• Meat Science
• Food Technology
• Animal Science

Background:

• Electrical stimulation (ES) is utilized in meat processing to enhance quality.
• Understanding the mechanisms of ES on meat quality attributes is essential for optimizing its application.
• Existing knowledge on ES effects on muscle pH and temperature dynamics requires further elaboration.

Purpose of the Study:

• To review the mechanisms of electrical stimulation (ES) in modulating meat quality.
• To present evidence linking ES-induced changes in muscle pH/temperature to meat tenderness.
• To describe the interactions between electrical parameters and muscle contraction for technology design.

Main Methods:

• Literature review of electrical stimulation effects on carcass muscles.
• Analysis of pH and temperature profiles in response to ES.
• Examination of electrical parameter and muscle contraction interactions.

Main Results:

• ES influences meat quality attributes, notably tenderness, through modifications in muscle pH and temperature.
• Specific electrical parameters correlate with distinct muscle contraction responses.
• Inappropriate ES can lead to detrimental meat quality, such as PSE (Pale, Soft, Exudative) conditions.

Conclusions:

• Electrical stimulation is a viable technology for enhancing meat quality, particularly tenderness.
• Optimizing ES parameters based on muscle physiology is key to maximizing benefits and avoiding risks.
• Careful application of ES is necessary to prevent adverse effects on meat quality and commercial value.