Nervous System Part 4b - Spinal Cord Internal Structure Flashcards
what is the lighter coloured material that is more around the outside of the spinal cord?
the white matter
- myelinated axons
what is the interior darker material of the spinal cord?
the grey matter
- more centrally located
- composed to cell bodies
what is the central canal a continuation of?
the central canal from the inferior end of the fourth ventricle up in the brain
- contains cerebral spinal fluid
the spinal cord along with our brain makes up?
our central nervous system
the nerves coming in and out of the spinal cord is apart of which system?
the peripheral nervous system
what do sensory neurons do?
bring information to the spinal cord and brain
what do motor neurons do?
carry signals away from the spinal cord, out towards the structures of the body
motor neurons are going to exit the spinal cord through the ________ of the spinal cord.
anterior
- ‘exit through the front door’
how do motor neurons leave the spinal cord?
go through anterior rootlets and then the rootlets end up forming an anterior root and then they eventually combine with the sensory neurons to form the spinal nerve which then carry out to the muscles and glands of the body and tell them what to do
which side of the spinal cord does the sensory neurons bring information into?
the posterior of the spinal cord
what is the posterior/dorsal root ganglion?
a bulbous structure that happens at every level where nerves are coming IN TOWARDS the spinal cord
- a collection of cell bodies of the sensory neurons
- an axon comes in to bring in information, then the cell body, and then another axon carrying the information into the spinal cord
how does the sensory neurons travel to the spinal cord?
from the dorsal root ganglion, to the dorsal/posterior root, and then in through the posterior or dorsal rootlets
