Single joint muscles

Single joint muscles are muscles that cross only one joint and act on that joint to produce movement. They are typically responsible for simple movements like flexion, extension, abduction, or rotation.

Examples of single joint muscles:

1. Biceps brachii (elbow flexion)

2. Triceps brachii (elbow extension)

3. Quadriceps (knee extension)

4. Hamstrings (knee flexion)

5. Deltoids (shoulder abduction)

6. Brachialis (elbow flexion)

7. Brachioradialis (elbow flexion)

8. Extensor carpi radialis brevis (wrist extension)

9. Flexor carpi radialis (wrist flexion)

10. Tibialis anterior (ankle dorsiflexion)

Characteristics of single joint muscles:

1. Cross only one joint

2. Act on a single joint to produce movement

3. Typically responsible for simple movements

4. Often have a single function or action

5. Can be more prone to injury due to limited range of motion

Single joint muscles are important for:

1. Simple movements like flexion, extension, abduction, or rotation

2. Stabilizing joints

3. Assisting in movement control

4. Maintaining posture