Käeulatus

Käeulatus is an Estonian term used in anatomy and biomechanics to describe the action of extending the arm, specifically the straightening of the elbow so the forearm aligns with the upper arm. It can also refer to the position achieved when the arm is fully extended and the hand reaches outward in space. The word combines käe, meaning arm or hand, with ulatus, meaning extension or reach, and is common in Estonian medical, sports science, and rehabilitation literature.

In clinical and athletic contexts, käeulatus is used to describe the range of motion at the elbow and shoulder and to assess functional reach. It helps evaluate the ability to perform overhead or extended tasks and informs treatment or training plans. The concept is relevant for activities ranging from daily tasks to throwing, climbing, or overhead lifting where full extension is required.

Measurement of käeulatus is typically performed with a goniometer or inclinometer to determine the angles of elbow and shoulder joints during extension. Full elbow extension is generally around 0 degrees, with some individuals able to achieve slight hyperextension. Limitations to käeulatus may arise from muscle tightness, joint stiffness, swelling, trauma, or post-surgical changes.

Related concepts include elbow extension, range of motion, and biomechanics. Käeulatus provides a concise term for describing an important functional movement in the upper limb.