Inferior oblique part of longus colli
Pars obliqua inferior musculi longi colli · Dolní šikmá část dlouhého svalu krku
Muscles
Looks like
The lower slanting part of the longus colli, running from the front of the upper chest vertebrae up to the transverse processes of the lower neck vertebrae.
What it does
Helps bend the neck forward and slightly to the side, and steadies the neck bones.
Keeping it well
Deep neck flexors weaken with neck pain and whiplash; specific chin-tuck exercises retrain them.