Spinal Cord Segments, Roots and Nerves

Question 1

A SC ___________ is the area of the spinal cord from which a pair of dorsal and ventral roots arise.

Answer 1

SEGMENT

Question 2

Are there distinct boundaries between SC segments?

Answer 2

NO

Question 3

What is the name of the bony channel, where the anterior and posterior roots join together to form a spinal nerve?

Answer 3

INTERVERTEBRAL FORAMEN

Question 4

Where is the spinal nerve particularly vulnerable to injury?

Answer 4

INTERVERTEBRAL FORAMEN

Question 5

The dorsal (posterior) root carries ___________ information.

Answer 5

AFFERENT

Question 6

The ventral (anterior) root carries ___________ signals from the spinal cord to muscles and viscera.

Answer 6

EFFERENT

Question 7

Each vertebra has 2 ___________ that project posteriorly to form the spinous process.

Answer 7

LAMINAE

Question 8

Moving inferiorly down the SC, the length of the nerve roots ______________ progressively.

Answer 8

INCREASES

Question 9

Which roots (below the conus medullaris) form the cauda equina?

Answer 9

LUMBAR SPINAL NERVE ROOTS
+
SACRAL SPINAL NERVE ROOTS

Question 10

How many pairs of spinal nerves and segments does the SC have?

Answer 10

31 and 31

Question 11

Name the 31 SC segments?

Answer 11

8 CERVICAL
\+
12 THORACIC
\+
5 LUMBAR
\+
5 SACRAL
\+
1 COCCYGEAL

Question 12

The names of the spinal nerves correspond to the names of the SC ____________ from which the emerge.

Answer 12

SEGMENT

Question 13

Each of the first cervical nerves leaves the vertebral column ___________ the corresponding vertebrae.

Answer 13

ABOVE

Question 14

The eighth cervical nerve leaves between the ___________ cervical, and the __________ thoracic vertebrae.

Answer 14

7TH CERVICAL
+
1ST THORACIC

Question 15

From the T-spine down, the nerves leave __________ the corresponding vertebra.

Answer 15

BELOW