Module 11 - Spinal Cord Injury Flashcards
How does the Peripheral NS break up?
Peripheral NS –> Motor (Efferent) Neurons –> Autonomic and Somatic (voluntary)
ANS –> SNS and PNS
Peripheral NS –> Sensory (Afferent) Neurons
Efferent
goes from the brain to the periphery
efferent
Afferent
goes from the periphery to the brain
sensory
How many vertebrae are there
32 to 33
What is the order of the vertebrae types and their amounts
7 Cervical
12 Thoracic
5 Lumbar
5 Fused Sacral
3-4 Fused Coccygeal
The First spinal Nerves exit … and this pattern goes until…
exit ABOVE C1 and this goes through C7
Where does the C7 spinal nerve exit
above the C7 vertebrae
Where does the C8 spinal nerve exit
C8 exits below C7 vertebrae and above T1. From there T1 spinal exits below T1, and so on for the rest
Intervertebral Discs
spongy disks between the spinal column giving flexibility and allows us to not have bone grinding on bone
also allows load bearing
made up of the nucleus pulposus and the annulus fibrosis
Nucleus Pulposus
area of the intervertebral discs that is the pulpy part more medial/inside
Annulus Fibrosis
the thick fibrotic ring that is more firm on the outside of the intervertebral disk
What gives our spinal cord and vertebrae support?
Longitudinal Ligaments - they give longitudinal support
Ligaments connect __ to ___
bone to bone
tendons connect __ to __
muscle to bone
What do longitudinal ligaments do?
they keep vertebrae aligned properly to stay straight
very functional in keeping vertebrae slipping side to side as well
What is the problem with a longitudinal ligament though?
they are stronger on the front side than back side so a disk herniation is more likely to go backward
Types of Longitudinal Ligaments
Anterior Longitudinal
posterior longitudinal
supraspinal
interspinal
ligamentum flavum
What is an additional stabilizer for the back?
Back muscles which help us stand erect
Efferent goes ___ Afferent comes ___
away ; toward
The sensory cortex and motor cortex and their afferent/efferent connections are mostly made of what
white matter
Where are the cell bodies (Grey Matter) in the brain and spinal cord?
it is outside the brain and inside the spinal cord
Where are the axons (white matter) in the brain and spinal cord?
inside of the brain and outside of the spinal cord
How do motor neurons move down the body?
they initiate at the motor cortex and travel down where they cross at the medulla oblongata and go down the opposite side where they then exit at the ventral root of the spinal cord
so the left arm is controlled by right motor nerves at the medulla oblongata level
How do sensory neurons move up the body?
Some will go up on the same side (ipsilaterally) while others go up the other side (contralateral)