The dermatome covering the posterior thigh and buttock is:
Solution
Correct Answer: Option B
The dermatome covering the posterior thigh and buttock is primarily supplied by the S1 nerve root. This area corresponds to the sensory distribution of the S1 dermatome, which includes the posterior aspect of the leg extending to the lateral foot. Clinically, damage or compression of the S1 nerve root often results in sensory deficits or pain in this region, which is crucial for diagnosing radiculopathies such as herniated discs or sciatica. In surgical procedures involving the lumbar spine or hip, preserving the integrity of the S1 nerve root is vital to maintain sensation and motor function of the posterior thigh and calf.
Reference: Gray's Anatomy, Richard L. Drake et al., 42nd Edition.
Reference: Gray's Anatomy, Richard L. Drake et al., 42nd Edition.
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