kyynärvarsia

Kyynärvarsi refers to the part of the arm between the elbow and the wrist. It is comprised of two long bones, the radius and the ulna, which articulate at the elbow and wrist joints. The radius is located on the thumb side of the forearm, while the ulna is on the pinky finger side. These bones are connected by an interosseous membrane, a fibrous sheet that also allows for muscles to attach.

Numerous muscles reside in the forearm, responsible for a wide range of movements. These muscles are generally divided into anterior (flexor) and posterior (extensor) compartments. The anterior muscles primarily control wrist and finger flexion, as well as forearm pronation (rotating the palm downwards). The posterior muscles, conversely, are responsible for wrist and finger extension and forearm supination (rotating the palm upwards).

The forearm's complex musculature and skeletal structure enable fine motor skills, such as grasping and manipulating objects, as well as more powerful movements. Blood vessels, including the radial and ulnar arteries, and nerves, such as the median, ulnar, and radial nerves, also travel through the forearm, supplying these muscles and providing sensation to the hand and fingers. Injuries to the forearm can range from simple sprains and strains to fractures of the radius or ulna, often requiring medical attention and rehabilitation.