An inertial measurement unit works by detecting the current rate of acceleration using one or more accelerometers, and detects changes in rotational attributes like pitch, roll and yaw using one or more gyroscopes. And some also include a magnetometer, mostly to assist calibration against orientation drift.
In the human there are 31 pairs of spinal nerves, one on each side of the vertebral column. These are grouped into the corresponding cervical, thoracic, lumbar, sacral and coccygeal regions of the spine.
The first two nerves (olfactory and optic) arise from the cerebrum, whereas the remaining ten emerge from the brain stem. The names of the cranial nerves relate to their function and they are also numerically identified in roman numerals (I-XII). In this article, we shall summarise the anatomy of the cranial nerves.