Question

question 10
1 pts
a patient complains of numbness in the skin of the buttocks and the posterior surface of the thigh and leg. the spinal nerve or peripheral branch most likely involved with this condition is the ______ plexus.
brachial
cervical
coccygeal
thoracic

question 11
1 pts
the spinal tract is located on the side of the cord, originates in the brain, and terminates in the spinal cord in the ______ tract.
lateral corticospinal
ventral spinothalamic
dorsal corticospinal
lateral spinothalamic

Explanation:

For Question 10:

• The brachial plexus supplies the upper limb, so it is not related to the buttocks, thigh, and leg.
• The cervical plexus mainly supplies the neck area.
• The coccygeal plexus has a very limited distribution.
• The thoracic spinal nerves have a different dermatome distribution pattern compared to the described symptoms. However, if we consider the overall nerve plexus - related knowledge (though the options might be a bit off - in a more accurate sense, the sacral plexus is related to the buttocks, posterior thigh and leg, but among the given options, there is no sacral plexus. If we assume it's a mis - optioning and we are to choose the least wrong one, we note that the coccygeal plexus is part of the lower spinal nerve complex. But in a more standard anatomical sense, this question might have an error. But if we have to choose from the given options, we can analyze as follows:

For Question 11:

• The ventral spinothalamic tract is mainly for crude touch and pressure and is not located on the side of the cord in the way described.
• The dorsal corticospinal tract is not a major tract in the standard description.
• The lateral spinothalamic tract is for pain and temperature and is not an upper motor neuron tract (originating from the brain).
• The lateral corticospinal tract is located on the side (lateral funiculus) of the spinal cord, originates in the brain (motor cortex), and terminates in the spinal cord to control voluntary movement.

Answer:

Question 10: None of the options are completely accurate (in a standard anatomical sense, the sacral plexus is related, but if forced to choose from given options, there is an issue. If we assume a mis - optioning and consider the coccygeal plexus as part of the lower spinal nerve complex, but this is a stretch).
Question 11: lateral corticospinal.