Elbow Doctor in Southlake

As a hinge joint, the elbow connects the upper arm to the forearm, enabling everything from lifting and gripping to throwing and pushing. Our elbow doctor in Southlake believes understanding how your body works is the first step toward lasting relief. Here’s how the bones, muscles, ligaments, and nerves of your elbow work together to support movement and stability.

Bones & Joints: The Elbow Structure

Three bones that work together to provide strength and flexibility from the elbow joint:

• Humerus (Upper Arm Bone): Forms the top part of the joint and connects to the forearm.
• Ulna (Forearm Bone): The larger, inner forearm bone that forms a hinge with the humerus for bending and straightening.
• Radius (Forearm Bone): The smaller, outer forearm bone that works with the ulna to allow rotation of the wrist and forearm.

The elbow actually consists of three smaller joints:

• Humero-Ulnar Joint: Enables bending and straightening of the arm.
• Humero-Radial Joint: Supports flexion, extension, and rotation of the forearm.
• Radio-Ulnar Joint: Allows the lower arm to rotate, helping you turn your palm up or down.

To reduce friction and absorb shock, the ends of these bones are covered with articular cartilage and lubricated by synovial fluid (a viscous liquid that lubricates and cushions the joints), ensuring smooth, pain-free movement.

Muscles: Powering Elbow Movement

Your elbow relies on several muscles to control movement, strength, and stability:

• Biceps Brachii: Helps you to bend your elbow.
• Triceps Brachii: Helps straighten your arm and stabilize movement.
• Brachialis: A deep muscle that assists in flexing the elbow.
• Brachioradialis: A forearm muscle that helps with pulling and gripping movements.
• Pronator Teres: Rotates the forearm to turn the palm downward.

These muscles work together to support every movement, from lifting a bag to throwing a ball.

Ligaments & Tendons: The Elbow’s Built-in Support System

Strong ligaments and tendons, which provide stability and prevent dislocation, hold together the elbow.

• Medial or Ulnar Collateral Ligament (UCL): Supports the inner side of the elbow.
• Lateral or Radial Collateral Ligament (RCL): Reinforces the outer side of the joint.
• Annular Ligament: Wraps around the radius to allow rotation of the forearm.

Tendons connect muscles to bones, helping control motion:

• Biceps Tendon: Attaches the biceps to the radius, enabling the elbow to bend.
• Triceps Tendon: Connects the triceps to the ulna, enabling the elbow to straighten.

Injuries to these structures—such as sprains, tears, or inflammation—can lead to pain, weakness, and limited mobility.

Nerves & Blood Flow: Keeping Your Arm Connected

Your nerves and blood vessels ensure your elbow functions properly by delivering signals and oxygen-rich blood:

• Ulnar, Radial, and Median Nerves: Control elbow, wrist, and hand movement and send touch, temperature, and pain signals to the brain.
• Brachial Artery: The main blood vessel supplying oxygen to the elbow, which branches into the ulnar and radial arteries.

Nerve compression or circulation issues can cause numbness, tingling, or weakness, often requiring specialized care.