3/7/2022
SPINAL NERVES
Dorsal root
Dorsal ramus
of spinal nerve
Ventral ramus
Ventral root of spinal nerve
1
, 3/7/2022
31 Pairs
◦ Each contains thousands of
nerve fibers
◦ All mixed nerves (sensory &
motor neurons)
Connected to spinal cord
Named according to exit from
spinal cord
◦ Cervical nerves 8 pairs (C1-C8)
◦ Thoracic nerves 12 pairs (T1-T12)
◦ Lumbar nerves 5 pairs (L1-L5)
◦ Sacral nerves 5 pairs (S1-S5)
◦ Coccygeal nerves 1 pair (Co1)
12
-3
Brachial plexus
Cervical nerves (C5-T1)
2
SPINAL NERVES
Dorsal root
Dorsal ramus
of spinal nerve
Ventral ramus
Ventral root of spinal nerve
1
, 3/7/2022
31 Pairs
◦ Each contains thousands of
nerve fibers
◦ All mixed nerves (sensory &
motor neurons)
Connected to spinal cord
Named according to exit from
spinal cord
◦ Cervical nerves 8 pairs (C1-C8)
◦ Thoracic nerves 12 pairs (T1-T12)
◦ Lumbar nerves 5 pairs (L1-L5)
◦ Sacral nerves 5 pairs (S1-S5)
◦ Coccygeal nerves 1 pair (Co1)
12
-3
Brachial plexus
Cervical nerves (C5-T1)
2
