Spinal branches, pass into the vertebral canal via the intervertebral foramina and contribute to supply not only of the vertebral bodies and extradural content of the canal, but also of the dura and spinal cord, reinforcing the anterior and posterior spinal arteries.
Your baby will be able to see pretty clearly by the time he's 12 months old, but his vision won't be fully developed until he's between 3 and 5 years old. A baby's vision improves dramatically over the first year. At birth an infant can detect light and motion, then can make out faces and large shapes. By the end of the first month, a baby can make eye contact and focus on objects about 12 inches away. By the time a baby is 3 to 4 months old, he can distinguish between colors and focus on smaller objects.
They can move more, although their movements may be jerky. A baby born at this time can grasp a finger. These babies can open their eyes, and they begin to stay awake and alert for short periods. Babies born at 28 to 31 weeks are at risk for medical complications. However, when complications occur, they may not be as severe as those of babies born earlier.