Sensorimotor Development Mobility and Stability- Sitting

Question 1

0-3 months (held in sitting)

Answer 1

• Head bobs in sitting
• Back is rounded
• Hips are apart, turned out, and bent
• Head is steady
• Chin tucks; able to gaze at floor
• Sits with less support
• Hips are bent and shoulders are in front of hips

Question 2

5-6 months (supports self in sitting)

Answer 2

• Sits alone momentarily
• Increased extension of back
• Sits by propping forward on arms
• Wise base, legs are bent
• Periodic use of “high guard” position
• Protective responses present when falling to the front

Question 3

5-10 months (sits alone)

Answer 3

• Sits alone steadily, initially with wide base of support

- Able to play with toys in sitting position

Question 4

6-11 months

Answer 4

• Gets to sitting position from prone position

Question 5

7-8 months

Answer 5

• Equilibrium reactions are present
• Able to rotate upper body while lower body remains stationary
• Protective responses are present when falling to the side

Question 6

8-10 months

Answer 6

• Sits well without support
• Legs are closer; full upright position, knees straight
• Increased variety of sitting positions, including “w” sit and side sit
• Difficult fine motor tasks may prompt return to wide base of support

Question 7

9-18 months

Answer 7

-Rises from supine position by first rolling over to stomach then pushing up into four-point position

Question 8

10-12 months

Answer 8

• Protective extension backwards, first with bent elbows then straight elbows
• Able to move in and out of sitting position into other positions

Question 9

11-12 months

Answer 9

• Trunk control and equilibrium responses are fully developed in sitting position
• Further increase in variety of positions possible

Question 10

11-24 months +

Answer 10

• Rises from supine by first rolling to side then pushing up into sitting position