The Usual Initial Age at Which Infants Begin to Demonstrate

question 13

Multiple Choice

The usual initial age at which infants begin to demonstrate meaningful social smiles in response to parental interaction is at:

• A) 2 months.
• B) 3 months.
• C) 5 months.
• D) 6 months.

---

Definitions:

Motor Area

A region of the brain involved in the planning, control, and execution of voluntary movements, primarily located in the precentral gyrus of the frontal lobe.

Frontal

Relating to the front part of something, especially the part of the brain located at the front of the head.

Hemiplegia

A condition resulting in weakness or paralysis on one side of the body, typically caused by brain damage.

Paraplegia

A condition involving the paralysis of the legs and lower body, typically caused by spinal cord injury or disease.