The process in which a relatively unspecialized cell acquires specialized features of a cardiac muscle cell in the atrium. Cardiac muscle cells are striated muscle cells that are responsible for heart contraction. The atrium is the part of the heart that receives blood into the organ.
cardiac muscle cell development +
cardiac muscle cell fate commitment +
cardiac pacemaker cell differentiation +
His-Purkinje system cell differentiation +
negative regulation of cardiac muscle cell differentiation +
positive regulation of cardiac muscle cell differentiation +
regulation of cardiac muscle cell differentiation +