Visions for the starting point of the Heartline

Personally I think the radial side of the heart line is influenced by the movement capabilities, structure, and position preferences of the thumb and index finger in early development as well as throughout life.

The only movement that directly influences the ulnar side is the tension and movement of the little finger. There is no counter pulling or pushing from the rest of the ulna side until the wrist.

The Suwon crease is supposedly a crease that forms after birth and into very early childhood. This is a crease that appears to form radially and move toward the ulnar side to touch the heart line.

As Martijn pointed out somewhere recently, the heart line first appears radially. The hand as it develops does so in an uneven fashion so that certain parts of the hands are ahead in their development and some parts are trailing behind. This is normal. And in normally developing hands, the ulnar side, little finger and even the thumb on the radial side are last in completing development while the index to ring fingers are more advanced.

(Martijn shared this image in 2002)

Kiwihands shared the images recently of a woman whose heart line was very thin in appearance on the ulnar side of the hand. In the silhouette on the side you can see an indentation so the heart line does continue around the side.

Good informative discussion