Käsivarsilihakset

Käsivarsilihakset collectively refer to the muscles found in the upper limb of the human body, extending from the shoulder to the wrist. These muscles are crucial for a wide range of movements, including lifting, carrying, pushing, pulling, and fine motor skills. They can be broadly categorized into the muscles of the upper arm and the muscles of the forearm.

The upper arm primarily contains the biceps brachii, brachialis, and triceps brachii. The biceps brachii, located on the front of the upper arm, is responsible for flexing the elbow and supinating the forearm. The brachialis, situated beneath the biceps, also aids in elbow flexion. The triceps brachii, located on the back of the upper arm, is the primary extensor of the elbow.

The forearm muscles are more numerous and complex, divided into anterior (flexor) and posterior (extensor) compartments. The anterior forearm muscles are primarily involved in flexing the wrist and fingers, as well as pronating the forearm. Examples include the flexor carpi radialis, flexor digitorum superficialis, and flexor pollicis longus. The posterior forearm muscles are responsible for extending the wrist and fingers, and supinating the forearm. Notable posterior muscles include the extensor carpi radialis, extensor digitorum, and extensor pollicis longus.

Together, these muscles enable the intricate movements and powerful actions of the arms, contributing significantly to daily activities and athletic performance. Their coordinated action allows for both strong grips and delicate manipulations.