A flexor muscle is a muscle that decreases the angle between bones on two sides of a joint, resulting in flexion.
In simpler terms, flexor muscles are responsible for bending or flexing a part of the body. When a flexor muscle contracts, it pulls the bones closer together, reducing the angle between them.
Here's a breakdown:
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Flexion: The act of bending or decreasing the angle of a joint.
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Flexor Muscle's Role: The muscle that makes flexion possible.
Examples of Flexor Muscles and Their Actions:
| Muscle | Action | Location |
|---|---|---|
| Biceps Brachii | Flexes the elbow (bends the forearm up) | Upper Arm |
| Hamstrings | Flexes the knee (bends the lower leg back) | Back of Upper Leg |
| Iliopsoas | Flexes the hip (brings the thigh upwards) | Hip/Pelvis |
| Flexor Digitorum Longus | Flexes the toes | Lower Leg |
How Flexor Muscles Work:
Flexor muscles typically work in pairs with extensor muscles. Extensor muscles perform the opposite action – they increase the angle between bones at a joint (extension). For example, the biceps brachii (a flexor) flexes the elbow, while the triceps brachii (an extensor) extends the elbow. This antagonistic relationship allows for controlled movement.
Flexor muscles are crucial for a wide range of movements, from simple actions like bending your fingers to complex activities like running and jumping.
