The influence shows itself in the back of the neck.

Related:

• The influence shows itself in the
  big toe...
• The influence shows itself in the jaws,
  cheeks and tongue...
• The influence shows itself in the calves of the legs.
  Misfortune. Tarrying brings good fortune...
• The influence shows itself in the thighs. Holds to that which follows it.
  To continue is humiliating...
• The [animal] shows you a scholarly paper by Dolittle,
  D. Vet. which demonstrates that animals don't have...
• The manner of giving, shows the character of the giver,
  more than the gift itself. --...
• Hot time, summer in the city.
  Back of my neck feeling dirty and gritty...
• If you put a chain around the neck of a slave,
  the other end fastens itself around your own. --...
• Good breeding shows itself most where, to an ordinary eye,
  it appears least. --...