1st September 2020

A couple have brought their 2-year-old son to clinic

A couple have brought their 2-year-old son to clinic. They have been referred from their GP due to concerns over his development. He has only recently started standing independently, and struggles to take any steps. He was born at term, and his birth was a normal vaginal delivery with no complications. Both mother and father are fit and well, and had no childhood illnesses. 

Which of the following tests is the most appropriate first-line investigation?

Select the SINGLE most appropriate option from the list below. Select ONE option only.