🔌 Galvanic vs Faradic Currents: Key Differences for Students

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 Electrotherapy is a powerful tool in physiotherapy — and two of its foundational currents are Galvanic and Faradic currents. Whether you're studying for exams or brushing up for clinical practice, here's a clear breakdown to help you understand the key differences between the two.

⚡ What Are They?

🔌 Galvanic Current

Also called Direct Current (DC), this is a continuous, unidirectional flow of electric charge. It has a constant polarity (positive and negative electrodes).

  • Type: Continuous Direct Current (DC)

  • Polarity: Fixed (positive/negative)

  • Used for:

    • Iontophoresis

    • Wound healing

    • Stimulation of denervated muscles

🔄 Faradic Current

This is an Interrupted or Pulsed Alternating Current (AC), with short duration and high frequency. It mimics natural nerve impulses to stimulate muscles.

  • Type: Interrupted Pulsed AC

  • Polarity: No fixed polarity

  • Used for:

    • Muscle re-education

    • Improving muscle tone

    • Treating muscle atrophy in partially innervated muscles

📊 Key Differences at a Glance

FeatureGalvanic CurrentFaradic Current
Type of CurrentDirect (DC)Alternating (Interrupted AC)
PolarityFixed (Positive/Negative)No fixed polarity
SensationStrong, stingingMild, tapping
Muscle TypeDenervated musclesPartially innervated muscles
UsesIontophoresis, wound healingMuscle re-education, toning
Risk of burnsHigher (if polarity misused)Lower

🧠 Easy Tip to Remember

Galvanic = Gravity = Constant flow
Faradic = Fast = Pulsed stimulation

🩺 Clinical Relevance for Physio Students

Understanding the difference helps you:

  • Choose the right current for specific conditions

  • Adjust treatment parameters safely

  • Understand patient responses to therapy

  • Prepare for viva and clinicals confidently

📚 Studying electrotherapy doesn't have to be electric shock therapy!
With clear concepts and hands-on practice, you’ll be ready to use these modalities wisely and effectively.

👉 Follow @HopeLinePhysio for more student-friendly physio guides, viva prep tips, and clinical insights!

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