A combination of these symptoms due to vertebral narrowing is called vertebral insufficiency. Note that a narrowing in the subclavian arteries (which supply the arms) can also sometimes cause vertebral symptoms, since the vertebral arteries branch from these arteries.
1 Some eager parents interpret a string of da-da babbles as their baby's first words -- daddy!. 2  But babbling at this age is usually still made up of random syllables without real meaning or comprehension. 3  Baby talk at 9 months. 4  After 9 months, babies can understand a few basic words like no and bye-bye..
Talking is the next milestone of which parents are typically aware. A toddler's first word most often occurs around 12 months, but again this is only an average. The child will then continue to steadily add to his or her vocabulary until around the age of 18 months when language increases rapidly.