Spinal nerves Flashcards
dorsal roots arise from what side?
The dorsal roots arise from the posterior side
the ventral roots arise on what side?
the ventral roots arise from the anterior side.
dorsal roots transmit what signals
- sensory
- Dorsal roots transmit sensory signals.
ventral roots transmit what signals
- motor
- Ventral roots transmit motor signals
what is gray matter
this area of spinal cord acts as an integration and reflex processing centre
what are spinal nerves
spinal nerves transfer signals. between the body and the spinal cord
what is white matter
it is organised into columns that pass information up and down the spinal cord
the spinal nerves arise from the signal cord and are bunched into 4 regions. what are the regions?
- cervical
- thoracic
- lumbar
- sacral
spinal nerves are also grouped into plexuses. what is a plexus?
a network of spinal nerves that innervate a specific regions
the cervical plexus innervates the what
the neck and thoracic cavity
the brachial plexus innervates the what
the shoulder girdle and upper limbs
the lumbar and sacral plexus innervates the what
pelvis and lower limbs
how many pairs of cervical nerves are there?
8 pairs of cervical nerves (C01-C08)
how many pairs of thoracic nerves are there?
12 pairs of thoracic nerves (T01-T12)
how many pairs of lumbar nerves are there?
5 pairs of lumbar nerves (L01-L05)
