MD3 EXAM 2 FINAL EXAMINATION TEST
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VERIFIED SOLUTIONS
⩥ dorsal root. Answer: carries sensory information into the spinal cord
--> Dorsal root ganglion: lies along the root and houses the cell bodies
of afferent sensory neurons
⩥ ventral root. Answer: carries motor information out of the spinal cord
--> No ganglion because the cell bodies of motor neurons are located in
spinal cord = nucleus
⩥ What is a spinal nerve?. Answer: The coming together of the ventral
and dorsal root on either side of the spinal cord that allows the spinal
nerve to carry both sensory and motor neurons.
⩥ What type of information do spinal nerves carry?. Answer: Both
sensory and motor information travels between the spinal cord and the
rest of the body.
⩥ How many pairs of spinal nerves are there?. Answer: There are 31
pairs of spinal nerves.
, ⩥ How many cervical nerve pairs are there?. Answer: There are 8
cervical nerve pairs (C1-C8).
⩥ How many thoracic nerve pairs are there?. Answer: There are 12
thoracic nerve pairs (T1-T12).
⩥ How many lumbar nerve pairs are there?. Answer: There are 5 lumbar
nerve pairs (L1-L5).
⩥ How many sacral nerve pairs are there?. Answer: There are 5 sacral
nerve pairs (S1-S5).
⩥ How many coccygeal nerve pairs are there?. Answer: There is 1
coccygeal nerve pair (Co1).
⩥ Where does the spinal cord end?. Answer: The spinal cord ends at the
L1-L2 vertebrae.
⩥ What happens to spinal roots for nerves below the thoracic region?.
Answer: They originate at the end of the spinal cord (L1-L2) and travel
down the vertebral canal until they can exit at the vertebrae they are
named after.
⩥ Where does the S1 spinal root originate?. Answer: The S1 spinal root
originates at the end of the spinal cord (L1-L2).
2026 FULL QUESTION BANK WITH
VERIFIED SOLUTIONS
⩥ dorsal root. Answer: carries sensory information into the spinal cord
--> Dorsal root ganglion: lies along the root and houses the cell bodies
of afferent sensory neurons
⩥ ventral root. Answer: carries motor information out of the spinal cord
--> No ganglion because the cell bodies of motor neurons are located in
spinal cord = nucleus
⩥ What is a spinal nerve?. Answer: The coming together of the ventral
and dorsal root on either side of the spinal cord that allows the spinal
nerve to carry both sensory and motor neurons.
⩥ What type of information do spinal nerves carry?. Answer: Both
sensory and motor information travels between the spinal cord and the
rest of the body.
⩥ How many pairs of spinal nerves are there?. Answer: There are 31
pairs of spinal nerves.
, ⩥ How many cervical nerve pairs are there?. Answer: There are 8
cervical nerve pairs (C1-C8).
⩥ How many thoracic nerve pairs are there?. Answer: There are 12
thoracic nerve pairs (T1-T12).
⩥ How many lumbar nerve pairs are there?. Answer: There are 5 lumbar
nerve pairs (L1-L5).
⩥ How many sacral nerve pairs are there?. Answer: There are 5 sacral
nerve pairs (S1-S5).
⩥ How many coccygeal nerve pairs are there?. Answer: There is 1
coccygeal nerve pair (Co1).
⩥ Where does the spinal cord end?. Answer: The spinal cord ends at the
L1-L2 vertebrae.
⩥ What happens to spinal roots for nerves below the thoracic region?.
Answer: They originate at the end of the spinal cord (L1-L2) and travel
down the vertebral canal until they can exit at the vertebrae they are
named after.
⩥ Where does the S1 spinal root originate?. Answer: The S1 spinal root
originates at the end of the spinal cord (L1-L2).
