Based on your request, (sometimes referenced as acromyotonus) is a medical term for a type of myotonia (muscle spasm or inability to relax) that specifically affects the muscles of the extremities (hands and feet), often leading to a temporary "solid," stiff, or rigid state after contraction . Key Aspects of Acromyotonia
Symptoms are often worsened by cold temperatures or repetitive movement, leading to a "locked" or "solid" feel in the hands. acromyotonia
It should not be confused with the (part of the shoulder) or acromegaly (a growth hormone disorder). Based on your request