Which dermatome is on both shoulders?

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Study for the Parkinson’s Disease Exam. Engage with detailed flashcards and multiple-choice questions, each offering hints and explanations. Prepare effectively for your exam!

Multiple Choice

Which dermatome is on both shoulders?

Explanation:
Dermatomes are skin regions innervated by a single spinal nerve root, so knowing which root covers a body area helps locate where a sensor or lesion might involve. The shoulder’s sensory area—the deltoid region—is primarily supplied by the C5 dermatome. This means sensation over the lateral shoulder and deltoid area on both sides corresponds to C5. Other roots map to different regions: C4 is more about the superior shoulder/clavicular area, C6 covers the lateral forearm and thumb, and T2 involves the medial upper arm and axilla. So the shoulder region that appears on both shoulders best fits C5.

Dermatomes are skin regions innervated by a single spinal nerve root, so knowing which root covers a body area helps locate where a sensor or lesion might involve. The shoulder’s sensory area—the deltoid region—is primarily supplied by the C5 dermatome. This means sensation over the lateral shoulder and deltoid area on both sides corresponds to C5. Other roots map to different regions: C4 is more about the superior shoulder/clavicular area, C6 covers the lateral forearm and thumb, and T2 involves the medial upper arm and axilla. So the shoulder region that appears on both shoulders best fits C5.

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