When testing for motor function, the nurse should be aware of:

Correct Answer: A

Rationale: Motor function testing involves assessing symmetry and strength of muscle movements. Skin color, blood glucose levels, and heart rate are unrelated to motor function.

Correct Answer: C

Rationale: The L5 dermatome supplies the great toe and the dorsum of the foot. This is important in diagnosing lumbar nerve root compression.

Correct Answer: B

Rationale: The cervical sympathetic trunk runs lateral to the vertebral artery and posterior to the carotid sheath. It contains ganglia that provide sympathetic innervation to the head and neck.

Correct Answer: D

Rationale: The trochlear nerve (IV) innervates the superior oblique muscle, which depresses and abducts the eye. Paralysis of this nerve prevents downward gaze when the eye is turned inward.

Correct Answer: C

Rationale: The S1 and S2 nerve roots innervate the gastrocnemius and soleus muscles, which are responsible for plantar flexion of the ankle. This is important in assessing sacral nerve root function.