Finals: INTERFERENTIAL CURRENCY

Question 1

Frequency of each
low frequency- currents:
medium-frequency:
High frequency:

Answer 1

low frequency- currents: 1 - 2000Hz
medium-frequency: 3000 - 6000Hz
High frequency: >500,000 Hz

Question 2

Lower frequency = less resistance = ___ amplitude required

Answer 2

Lower frequency = less resistance = higher amplitude required

Question 2

What type of frequency current stimulates sensory (tingling) and motor nerves (mm contraction)

Answer 2

low frequency- currents

Question 2

What type of frequency current stimulates sensory & motor nn; overcoming skin resistance

Answer 2

medium-frequency

Question 2

What type of frequency current induces thermal effects

Answer 2

High frequency

Question 2

continuous VS peak-to-peak Sweep Patterns

Answer 2

. Continuous sweep involves a continuous modulation of beat frequency, while peak-to-peak sweep alters the beat frequency between maximum and minimum values.

Question 2

T or F
IFC is Used for pain relief, improvement of respiration , and enhancement of healing process

Answer 2

FALSE
Used for pain relief, improvement of circulation, and enhancement of healing process

Question 3

Produced by the interference of two medium-frequency alternating currents with slightly different frequencies.
It is also known as amplitude-modulated alternating current.

Answer 3

INTERFERENTIAL CURRENCY

Question 3

The lower of the two frequencies used in interferential current therapy, typically ranging from 1 to 100 Hz.

Answer 3

Carrier Frequency

Question 3

The interference frequency resulting from the difference between the frequencies of the two input currents. It reflects the therapeutic frequency that elicits the desired physiological effects

Answer 3

Beat Frequency

Question 3

Advantages of Bipolar IFC

Answer 3

potential for deeper penetration of currents due to reduced skin impedance with frequencies exceeding 1 kHz.
*The amplitudes of the currents summate in deeper tissues, and a beat frequency similar to other waveforms can be selected for muscle stimulation and pain modulation.

Question 3

It provides an alternative in promoting low-frequency stimulation to the body, offering therapeutic benefits.

Answer 3

Therapeutic Effects of IFC

Question 3

Constructive vs Destructive Interference

Answer 3

In constructive interference, the two asynchronous kilohertz (KHz) frequency currents intersect or interfere in-phase, resulting in the summation of amplitudes.
In contrast, destructive interference occurs when the currents are out of phase, leading to the cancellation of amplitudes.

Question 3

Administered using four electrodes positioned diagonally or across the painful area.
The electrodes create a Cloverfield electrical field, with the two currents intersecting perpendicularly within the patient’s tissues.

Answer 3

Quadrupolar IFC Administration

Question 3

Adjustable beat frequencies are available in modern IFC devices, allowing clinicians to select specific beat frequencies according to therapeutic goals.

Answer 3

Modulated Beat Frequency

Question 3

also known as premodulated IFC, is created within the stimulator device by the interference of two alternating currents.
Unlike quadrupolar IFC, only a single current is applied to the patient, delivered through two electrodes instead of four.

Answer 3

Bipolar IFC Administration