This notion is supported by studies which show that exercise interventions can decrease forward head and protracted shoulder postures and produce a more erect upper trunk posture (2, 3, 4, 5). (darwinian-medicine.com)
In a three - stage analysis of infants sitting up, being able to hold up their heads and upper trunks is a prerequisite to brief durations of independent sitting. (daddylibrary.com)
What it looks like: Little white bumps around the nose, chin or cheeks and sometimes on the upper trunk and limbs. (ph.theasianparent.com)