käevarre

Käevarre is the Estonian word for the human upper limb, specifically the region between the shoulder and the elbow. This anatomical part of the arm is crucial for a wide range of movements and functions. It consists of a single bone, the humerus, which articulates with the scapula at the shoulder joint and the ulna and radius at the elbow joint.

The musculature of the käevarre is organized into two main compartments: the anterior (flexor) and posterior (extensor) compartments. The anterior compartment contains muscles like the biceps brachii, brachialis, and coracobrachialis, which are primarily responsible for flexing the elbow and supinating the forearm. The posterior compartment is dominated by the triceps brachii, which extends the elbow. These muscles, along with the bones and connective tissues, are supplied by blood vessels, most notably the brachial artery, and innervated by nerves such as the musculocutaneous, median, ulnar, and radial nerves.

The käevarre plays a vital role in daily activities, from lifting and carrying objects to intricate fine motor tasks performed by the hand and forearm. Its structure allows for a significant range of motion, contributing to human dexterity and ability to interact with the environment. Injuries to the käevarre can range from fractures of the humerus to muscle strains and nerve damage, often requiring medical attention to restore function.