Tendons connect muscles to bones. The tendons located on your hand's palm side are responsible for bending your fingers and are termed flexor tendons, according to the American Academy of Orthopaedic Surgeons.

Muscle weakness in pediatrics, also known as hypotonia, may be a symptom of an underlying medical condition. If you suspect that your child is experiencing abnormal muscle development, consult a doctor as soon as possible.

The tailbone, called the coccyx, is the last three to five vertebraes at the bottom of the spine. Injury to the tailbone may occur when a person falls backwards, or during childbirth. A broken tailbone causes intense pain that may last for months or years.

A radial ulnar fracture is a fracture of the two bones that make up your forearm, the radius and the ulna. A fracture to both bones at the same time is most common towards the distal heads of each bone, closest to your wrist.

Strengthening your hand and restoring your range of motion is an important part of rehabilitation after hand surgery. By performing simple hand exercises that focus on strengthening and stretching your muscles, you can improve the flexibility of your fingers and hands.

Severe levels of ankle fractures may need orthopaedic surgery, which involves repairing with a plate and screws. These stabilizing devices play a major role in properly aligning your ankle bones during healing.

The long thoracic nerve is a branch of the cervical or neck nerves that supplies the chest wall muscles known as serratus anterior. The long thoracic nerve and serratus anterior muscle are responsible for forward arm movement like a boxing punch or working your arms overhead.

Physical therapy is a vital component of recovery after illness, injury or surgery. By using modalities such as electrical stimulation and ultrasound, a therapist can help alleviate your pain and promote healing.

A compression fracture of the lumbar spine is also known as a wedge fracture. The lumbar area of the spine contains five vertebrae known as L1 through L5, situated between the thoracic or chest area and the buttocks.

The brachioradialis, which spans the length of your forearm -- from just above the outside of your elbow to the thumb side of your wrist -- is susceptible to a muscle-strain injury when lengthened too far and too forcefully, just like any other muscle.