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) Neuroscience perspective. 1  The cerebrum has 2 parts: the right cerebral hemisphere and the left cerebral hemisphere. 2  The part of the brain that is responsible for complex thinking is the Frontal LobeâLocated under the forehead, the frontal lobe controls reasoning, planning, voluntary movement, and some aspects of speech. The prefrontal cortex is the part of the frontal lobe right behind the forehead.