Muscle supplied by lumber plexus is?
**Core Concept**
The **lumbosacral plexus**, including the lumbar plexus, is a complex neural network that provides motor and sensory innervation to the lower limbs. It is formed by the ventral rami of the lumbar and sacral spinal nerves. The lumbar plexus specifically involves nerves from L1 to L4.
**Why the Correct Answer is Right**
The correct answer involves identifying a muscle primarily innervated by nerves originating from the lumbar plexus. This plexus gives rise to several important nerves, including the femoral nerve and the obturator nerve, which supply major muscles in the thigh.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specifically related to the primary function or innervation pattern of the lumbar plexus.
**Option B:** Incorrect as it does not directly correlate with the muscles typically supplied by the lumbar plexus.
**Option C:** Incorrect because the muscle it refers to is not the primary one associated with the lumbar plexus.
**Option D:** Incorrect as the specific muscle supplied by the lumbar plexus is not accurately represented by this option.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the lumbar plexus is responsible for innervating muscles crucial for hip flexion and knee extension, among other functions. The **femoral nerve**, a major branch of the lumbar plexus, is particularly important for these movements.
**Correct Answer:** Correct Answer: D. Psoas major.