With Open Arms

For an excellent presentation on how the various parts of our bodies influence other parts and interact with our nervous/brain system read "The Embodied Mind" by Thomas R. Verny, M.D., 2021. Chapter 8 deals with the impact of our hearts on on our personality, energy levels, hormonal levels, alertness, emotions, etc., pp. 134-159.

A question:  Does the Heart Chakra govern, control, energetically interact with, or involve both arms?  

In the above artwork, from the cover of "Wheels of Life" by Anodea Judith, 1987, the Heart Chakra zone of the body is highlighted in a green color.  One would infer from the artwork that the arms are in the zone of the Heart Chakra.  In Anodea Judith's chart of correspondences for Chakra Four she lists parts of the body: lungs, heart, arm, hands. 
It would make sense from the point of view of the fact that most labor, work, productive activity involves the arms and hands.  We often work hard and long for those we love.  We hug those we love.  I like to welcome yogis, taoists, and druids with open arms.  I love to move my arms about gracefully in yoga, chi kung, and tai chi postures an know this helps my heart and lungs, the zone of the fourth chakra.  

The Chinese speak of mind-heart (hsin) and human nature (hsing) from Menicus.  

心

Hsin literally means "heart." It means mind, not the deluded mind of the ignorant but the Buddha-mind. Hsin is the mind that merge with the all-encompassing One Mind.

  

There is a Middle Dan Tien in chi kung theory.  It is in the heart area.  

Citta, a Pali word, refers to one's state of mind, emotional state, one's heart-mind, the quality of mental processes as a whole, heart-mind field of consciousness.

Tantric Yoga
Heart Chakra, Metta, Heart-Mind, Loving Kindness