CHAPTER 5: The Spinal Cord

CHAPTER 5: The Spinal Cord

Which of the following receptors mediates vibration sense?

A. Thermal receptor

B. Pacinian corpuscle

C. Ruffini corpuscle

D. Meissner's corpuscle

B. Pacinian corpuscle

A 30-year-old male was driving a motorcycle when he swerved off the road and suffered a severe spinal cord injury. On neurological examination he was noted to have lost the sense of touch on his right leg and lower abdomen to the level of the umbilicus. He also lost pain sensation. Select from the following to describe the side of cord injury and lowest dermatomal level of remaining pain sensation: side of spinal cord at the ___ spinal segment.

A. Left, T10

B. Left, L1

C. Right, L1

D. Right, T10

D. Right, T10

Pain signals from caudal visceral structures ascend within which spinal pathway?

A. Cuneate fascicle

B. Gracile fascicle

C. Anterolateral column

D. Ventral column

B. Gracile fascicle

Small-diameter afferent fibers terminate within which region of the spinal cord gray matter?

A. Ventral horn

B. Superficial laminae of the dorsal horn

C. Deep layers of the dorsal horn

D. Intermediate zone

B. Superficial laminae of the dorsal horn

Which of the following statements best describes a key feature of the reticulospinal tracts?

A. They are components of the lateral descending pathways.

B. They descend to the cervical spinal cord only.

C. They originate from the medulla.

D. They regulate autonomic behaviors.

C. They originate from the medulla.

The enlargement segments correspond to which of the following?

A. Thoracic segments

B. Segments containing the dorsal nucleus of Clarke

C. Segments innervating the ...