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1. IInnffaannttss
PPhhyyssiiccaall DDeevveellooppmmeenntt

2. Body Proportions
• Infant head is ¼ their total length
• Adult head is 1/10 their total length
• Long trunk
• “pot-bellied” abdomen
• Short legs
– Cause for “toddling”

3. Bones and Teeth
• Mainly made of cartilage
– Lying in one position may flatten head
– “tummy time”
• Ossification
– Depositing of calcium and phosphorus
– Skeletal frame becomes sturdy
– 1 yr. Old has only 3 bones in hand; adult has 28
– Skull becomes one bone by 2nd year

4. Bones and Teeth
continued
• Deciduous teeth
– Nonpermanent are developed by birth
– Sequence is usually the same
– Timing varies

5. Motor Development
• Use and control of muscles that
direct body movements
• Gross-motor skills- large muscles
• Fine-motor skills – small muscles

6. Motor Skills Develop in 3
Patterns
A. General to Specific
B. Head to foot
1. head control
2. trunk control
a. rolling over
b. sitting
C. Leg control
1. crawling
2. standing
3. walking

7. Motor Development
continued
• Center extremities
– Reflex is replaced by grasping

8. THE END