Which of the following nerves is associated with the lumbosacral plexus?Multiple ChoicePhrenicMedianMusculocutaneousUlnarObturator

Break Down the Problem

1. Identify the lumbosacral plexus and its associated nerves.
2. Review the options provided and determine which nerve is part of the lumbosacral plexus.

Relevant Concepts

• The lumbosacral plexus is a network of nerves formed from the lumbar and sacral spinal nerves, primarily involved in motor and sensory functions in the lower body.

Analysis and Detail

1. Phrenic Nerve: Originates from the cervical plexus (C3-C5); it innervates the diaphragm. Not part of the lumbosacral plexus.
2. Median Nerve: Arises from the brachial plexus; it innervates muscles of the forearm and hand. Not part of the lumbosacral plexus.
3. Musculocutaneous Nerve: Also originates from the brachial plexus; it supplies the anterior compartment of the arm. Not part of the lumbosacral plexus.
4. Ulnar Nerve: Another nerve from the brachial plexus; it innervates the muscles of the forearm and hand. Not part of the lumbosacral plexus.
5. Obturator Nerve: Arises from the lumbar plexus (specifically, L2-L4); it supplies the adductor muscles of the thigh. Part of the lumbosacral plexus.

Verify and Summarize

After reviewing all options, the only nerve associated with the lumbosacral plexus is the Obturator Nerve, while all other options are associated with the brachial plexus.

Final Answer

Obturator Nerve