prev next front |1 |2 |3 |4 |5 |6 |7 |8 |9 |10 |11 |12 |13 |14 |15 |16 |17 |18 |19 |20 |21 |22 |23 |24 |review
Suckling: primitive, large up/down jaw movements and forward/backward tongue movements. Little tongue activity.

Sucking: more mature, rhythmical, small up/down jaw movements and up/down tongue movements. Increased lip closure. Results in negative pressure.