Question

chapter 13 multiple choice question 13
1 part | -- of 1 point

dermatome maps are useful to clinicians because ______.

○ they outline the location of the numerous nerve plexus
○ they show the routes of motor nerves
○ they show doctors how to avoid striking spinal nerves during surgery
○ they can help pinpoint the location of spinal injury

Explanation:

1. Analyze Option 1: Dermatome maps don't outline nerve plexus locations. Nerve plexus has its own mapping, so this is incorrect.
2. Analyze Option 2: Dermatome maps are related to sensory (not motor) nerve distributions, so this is wrong.
3. Analyze Option 3: Dermatome maps aren't for surgical nerve avoidance directly; they relate to sensory innervation for injury localization, so this is incorrect.
4. Analyze Option 4: Dermatome maps show sensory nerve (spinal nerve) dermatomal distributions. If a patient has sensory loss in a dermatome, it helps pinpoint the spinal injury level (e.g., a spinal nerve lesion), so this is correct.

Answer:

D. they can help pinpoint the location of spinal injury