PMU - 2nd/2t Semester Anatomy - CNS (Spinal Cord)

The spinal cord occupies the entire vertebral canal:

The end of spinal cord (conus medullaris) adult is at L2:

The sacrum contains the subarachnoid space along the whole length of the sacral canal:

The atlas has the first cervical spinal nerve on its posterior arch:

The first spinal nerve has the shortest roots and the last one the longest:

The connection between the dorsal and lateral funicle is called Lisauer zone (zona terminalis)

Sulcus intermedius dorsali is a groove between sulcus medianus dorsalis and sulcus dorsolateralis in the upper thoracic and cervical part of the spinal cord.

Dorsal funiculus in the cervical segments contains fasiculus gracilis, laterally and fasciculus cuneatus, medially:

The spinal cord ends caudally at the coccyx:

If in the process of doing a lumbar puncture a spinal needle was inserted posteriorly in the mid-line until it had just penetrated the posterior longitudinal ligament, would the needle have entered the sub-arachnoid space?

The part of a spinal nerve that supplies the true back muscles and the skin overlying them is the:

A football player suffers a herniated (ruptured) intervertebral disk in his neck. The disk compresses the spinal nerve exciting through the invertebrate foramen between the 5th and 6th cervical vertebrae. Which spinal nerve is affected?

A man has a herniated intervertebral disk between the fourth and fifth lumbar vertebrae. If this disk compresses the spinal nerve in the intervertebral foramen immediately posterior to this disk, which spinal nerve would be affected?

Both the dural sac and the subarachnoid space end at which vertebral level?

It is decided to image the spinal cord and spinal nerve rootlets by doing a myelogram (injection of a radio-opaque dye into the subarachnoid space followed by a radio-graph). In order to inject the dye without injury to the spinal cord, the injection is usually done below what vertebral level?

The myelogram revealed that the dye had leaked out along the spinal nerves in the mid cervical region on the right side. For the dye to leak out, what layer must have been torn or ruptured?

In the lumbar spine, the L4 nerve root sleeve exits:

Which structure does NOT contain efferent autonomic nerve fibers?

It was noted that after an injury the patients face on the right side was flushed due to dilation of the blood vessels. The lack of vaso-constriction was due to interruption of what fibers somewhere along their course?

A 60-year-old male presented with a number of unusaul signs and symptoms in the facial region. Among others, it was found that the right side of his face was flushed (red). Further testing revealed a lack of ability to sweat in the same cutaneous region. Which nervous structures were most likely implicated in this set of clinical abnormalities?

The conus medullaris:

A neuron with a cell body in the dorsal root ganglia could convey what type of fibers?

Which is a source of axons found in the dorsal primary ramus of the 4th thoracic spinal nerve?

The denticulate ligament:

In order to expose the spinal cord from the posterior side, it is necessary to remove the:

Cells that convey information to the CNS are:

Dorsal roots of a spinal nerve:

The ventral roots of a spinal nerve:

The boundary between spinal cord and medulla oblongata is:

A spinal segment is defined as that region of the spinal cord that:

The spinal cord in the adult:

The white matter of the spinal cord:

The white matter of the spinal cord:

Grossly the spinal cord presents two swellings which are:

All spinal nerves:

The cell bodies of the nerve fibres making up the fasciculus gracilis are found in:

In the spinal cord: