The Ball Grid Array, BGA, uses the underside of the package, where there is a considerable area for the connections. SMD BGA Ball Grid Array package diagram. The pins are placed in a grid pattern (hence the name Ball Grid Array) on the under-surface of the chip carrier.
* The cerebellum (infratentorial or back of brain) is located at the back of the head. Its function is to coordinate voluntary muscle movements, and to maintain posture, balance and equilibrium. The cerebellum also affects emotions and higher-level cognitive functions.
A simple way to identify the location of the headache is to look at the position in relation to the parts of the skull, particularly the cranium. 1  Top of the head = parietal; vertex is the top most part. 2  Back of the head = occipital. 3  Side of the head = temporal. 4  Front of the head = frontal.