Coordination and Independence
The Integration Phase — motor, language, and early executive function systems converge as the thinking brain emerges
From Language Brain to Thinking Brain
At age 2, the language brain dominates — vocabulary explodes and word combinations emerge. By age 3, the thinking brain begins to take over as the frontal lobe accelerates growth, bringing early impulse control and executive function.
Neurodevelopment Timeline: 24–36 Months
Click each stage to explore — tap any system to expand details
Integration Phase
24–30 Months
Synaptic density near peak. Motor and language systems are integrating.
Developmental Systems
System Integration Summary
How each developmental system progresses from 12 to 36 months
🏃Movement System
12 mo: Walking begins
18 mo: Climbing begins
24 mo: Running stable
36 mo: Coordinated movement
Movement drives brain wiring.
💬Language System
12 mo: First words
18 mo: Word accumulation
24 mo: Word combinations
36 mo: Sentences
Language depends heavily on interaction.
💚Emotional Regulation
12 mo: Fully caregiver dependent
24 mo: Emotional storms common
36 mo: Early self-control emerging
Regulation matures slowly.
🔬Sensory Integration
12 mo: Exploration through body
18 mo: Sensory seeking common
24 mo: Preferences emerge
36 mo: Improved modulation
Sensory system underlies everything.
Variability is Normal
Sentences typically emerge between 24–36 months. Pattern progression matters more than exact timing. If a child is progressing through the sequence — even at their own pace — that is a positive sign.