1. Dissection of behavioral phenomena
Many mothers have noticed that before their babies fall asleep, during the weaning period, or when in unfamiliar environments, the babies exhibit some extremely stubborn micro-movements: they must firmly grasp a corner of the blanket, constantly rub a rough label on the clothes, or repeatedly touch a specific texture on their mother's clothes with their palms, and even constantly tug at their own ears. Once these actions are interrupted by adults or the items they are accustomed to touching are taken away, the babies will immediately wake up and cry loudly.
2. Core variables behind the behavior:
The relief of tactile defense and the sensory anchoring of "transition objects"
From the perspectives of developmental psychology and sensory integration, this is not an unbreakable "bad habit", but rather a high-level psychological self-stabilizing mechanism:
The sensory externalization of the "physical security boundary": When a baby transitions from being awake to falling asleep, it goes through a period of "anxiety" during which its awareness is blurred and it loses control over the surrounding space. By repeatedly and frequently touching and rubbing specific textures (especially thread ends, labels, or rough textures with clear boundaries), the baby establishes a "tactile anchor point" in its brain. This continuous and stable tactile signal can send a safety feedback to its limbic system: "The world hasn't changed, I am still surrounded by the familiar physical boundaries."
Autonomous activation of the parasympathetic nerve: This specific frequency of micro-movements can effectively reduce the excitability of the sympathetic nerve and decrease the secretion of cortisol (the stress hormone). It is the "environmental self-healing code" that babies spontaneously find after leaving their mother's embrace.
3. Deep Cognitive Reconstruction
Mother's Perspective: What the baby touches is not labels or thread ends; they touch the "sense of security that can be taken away". These items are called "transitional objects" in psychology. At this stage, forcibly taking away their comfort items or stopping these actions will completely break their psychological defense chain for space, causing more serious sleep disorders. The smart approach is to fix one or two safe, washable, and similar-textured comfort cloths or small dolls for them, allowing and respecting them to complete this sleep ritual exclusive to them within the compliant physical boundaries.
