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What areas does the Posterior Cutaneous Nerve of the thigh supply?
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Inferior buttocks, posterior thigh, popliteal region, calf, and heel.
What clinical relevance does the Sciatic Nerve hold?
It is often associated with sciatic nerve pain or sciatica, which can be caused by herniated disks leading to significant discomfort and mobility issues.
Describe the condition known as Sciatica.
Sciatica is caused by compression of the sciatic nerve, commonly due to a herniated disk, resulting in pain, numbness, and tingling in the posterior and lateral legs. Treatments may include rest, NSAIDs, physical therapy, and possible surgery.
Which spinal nerves form the Sciatic Nerve?
The Sciatic Nerve is formed by branches from L4, L5, S1, S2, and S3.
Which nerve supplies the cutaneous area around the coccyx?
The Coccygeal Plexus, formed from S4, S5, and Coccygeal 1.
What are the motor and sensory functions of the Pudendal Nerve?
Motor functions: external anal sphincter and external urethral sphincter; Sensory functions: entire perineum including the scrotum, penis, anus in males, and the clitoris, labia majora, and perineum in females.
Which nerve supplies the Gluteus Maximus and what are the primary functions of this muscle?
The Inferior Gluteal Nerve. The Gluteus Maximus functions as a hip extensor and lateral rotator.
Identify the main muscle supplied by the Inferior Gluteal Nerve.
The Gluteus Maximus.
Which spinal nerves contribute to the formation of the sacral plexus?
Spinal nerves L4, L5, S1–S5, and the coccygeal nerve (C1).
Which nerves are formed from the spinal nerves L4, L5, and S1?
The Superior Gluteal Nerve.
What major nerve from the sacral plexus is responsible for both motor and sensory functions and splits near the knee?
The Sciatic nerve, which splits into the tibial nerve (anterior division) and the common fibular nerve (posterior division).
What muscles are supplied by the Superior Gluteal Nerve and what are their functions?
The Gluteus Medius and Gluteus Minimus, which are hip abductors.
Which nerve arises from L5, S1, and S2, and what muscles does it supply?
The Obturator Internus Nerve, supplying the Obturator internus and superior gemellus muscles.
What does Hilton's Law state about the nerve supply?
Hilton's Law states that a nerve supplying muscles crossing a joint also supplies the skin around that joint.
From which spinal nerves does the Nerve to Piriformis arise, and what is its function?
It arises from S1 and S2 (posterior division) and supplies the Piriformis muscle, which is a lateral rotator of the hip.
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