Muscle Contractions

Twitch Contractions Definition

A quick, jerky response

Twitch Contractions Example

No Example

Tetanic Contractions Definition

A sustained and steady muscle contraction

Tetanic Contractions Example

Ex: When you flex your muscles

Tonic Contractions Definition

Simple muscle movements, low effort contractions that help us maintain body position

Tonic Contractions Example

Keeps posture

Isotonic Contractions Definition

When a movement is produced at a joint

Isotonic Contractions Example

Bending your knee

Concentric Contractions Definition

When a muscle shortens

Concentric Contractions Example

Lifting up a weight

Eccentric Contractions Defintion

When there is tension on the muscle, but it is lengthening

Eccentric Contractions Example

Lifting down a weight

Isometric Contractions Definition

Produce tension on a muscle but does not move

Isometric Contractions Example

Holding your arm steady