Lab 6 - EMG LAB

A set of vocabulary flashcards covering key concepts and measurements related to electromyography as discussed in the EMG lab master study guide.

EMG

Electromyography; recording of electrical muscle activity

Motor Unit

One motor neuron and all the muscle fibers it innervates

Recruitment

Increasing muscle force by activating additional motor units.

Muscle Tonus

A constant slight contraction of muscles even at rest

Tetany

A sustained muscle contraction caused by rapid repeated stimulation
where the muscle does not relax between contractions.

Amplitude

The height of the EMG signal, representing the strength of muscle contraction.

Duration

The length of time the EMG signal lasts, representing how long the muscle contraction lasts.

Muscle Fatigue

50% of maximum force.

Time to Fatigue

The amount of time it takes to reach 50% of maximum force

Mean (x̄)

A statistical measure, calculated as x̄ = Σx / n.

Delta T (Δt)

Represents the change in time, calculated as Δt = time₂ − time₁.

BIOPAC Setup Order

1. Turn computer on

2. Connect USB to BioPac

3. Connect USB to computer

4. Plug power cord into BioPac

5. Plug BioPac into electrical outlet

6. Double-check connections

7. Toggle switch on BioPac