Which plexus is formed by the ventral rami of first four lumber nerve roots (L1, L2, L3 (major) & part of L4). In 50% of cases it receives a contribution from the ventral rami of last thoracic root (T12).Group of answer choicesSacralFemoralLumbarCervical

The plexus formed from ventral rami of spinal nerves S5 and the coccygeal nerve is the plexus.

Which nerve arises from the ventral primary rami of the roots that form the brachial plexus but branches prior to the formations of the trunks of the plexus?Group of answer choicesMedianAxillaryRadialLong Thoracic

Which terminal branch of the brachial plexus is formed by posterior divisions of all nerve  roots that contribute to the brachial plexus?Group of answer choicesUnlarRadialAxillaryMedian

Which of the following is a spinal nerve plexus?

Check all that apply. The dorsal ramiCheck All That Applyform nerve plexuses.form nerve plexuses.innervate deep muscles of the dorsal trunk.innervate deep muscles of the dorsal trunk.innervate intercostal muscles.innervate intercostal muscles.innervate skin near the midline of the back.innervate skin near the midline of the back.