The humerus is the long bone located between the elbow and the shoulder joints in the upper arm. The humerus is made up of three different anatomic parts: the proximal humerus, the shaft and the distal humerus. The proximal humerus is part of the shoulder joint, and the distal humerus is part of the elbow joint.

If you injure the ligaments and tendons in your thumb it may be strained or sprained and need splinting to reduce pain, immobilize the joints and protect the thumb while it heals.

Immobilizing the wrist and hand at night with a splint is an effective way to prevent additional injury as a result of conditions such as tendonitis, carpal tunnel syndrome, sprains and fractures. Immobilization while you're asleep can be achieved using a homemade splint.

Splints are used to immobilize an extremity that has been injured. The injury can be a broken bone or a severe sprain. Splinting provides stabilization of the injury, some amount of pain relief and prevention of further injury.

Finger splints are sometimes used to hold your finger in place to keep it from moving, such as when it is sprained or broken. They can also be used to increase the range of motion of a finger that is stuck in a bent position and needs constant stretching. A variety of splints are available to treat finger injuries.