Handwriting Speaks Volumes

•  When we write, the ego is active but it is not always active to the same degree. Its activity waxes and wanes; being at its highest level when an effort has to be made by the writer and at its lowest level when the motion of the writing organ has gained momentum and is driven by it.
  
• When the action of writing is comparatively difficult, the writer uses those forms of letters which are simpler or more familiar.
  
• The muscular movements involved in writing are controlled by the central nervous system. The form of the resultant writing movement is modified further by the flexibly assembled coordinative structures in the hand, arm, and shoulder; which follow the principles of dynamical systems. The specific writing organ (mouth, foot, hand, crook of elbow) is irrelevant if it functions normally and is sufficiently adapted to its function.

Note: The neurophysiological mechanisms which contribute to the written movement are related to conditions within the central nervous system and vary in accordance with them.  The written strokes, therefore, reflect both transitory and long term changes in the central nervous system such as Parkinson's disease, or alcohol usage.  The movements and corresponding levels of muscular tension in writing are mostly outside of conscious control and subject to the ideomotor effect. Emotion, mental state, and biomechanical factors such as muscle stiffness and elasticity are reflected in a person's handwriting.