Transcript Spinal cord - OCPS TeacherPress

Spinal cord injuries:
 Paraplegia: paralysis of
both lower limbs
 Quadriplegia: paralysis of
all 4 limbs
DON’T WRITE: Complete
transection: loss of all
sensations and voluntary
movement below the level
of transection
DON’T WRITE:
Hemisection: partially
severed – paralysis on the
side of cut
“Challenges are often a matter of our perception."
Location
Part of CNS
Found within vertebral foramina of all
vertebrae (for protection)
extends to 3rd or 4th lumbar vertebrae
Function
•The pathway for sensory
input to the brain and motor
output from the brain
•Reflex center
Spinal cord anatomy
Gray matter
In the back;
Out the front
Posterior (dorsal) horns: sensory neurons
Anterior (ventral) horns: somatic motor neurons
WHITE MATTER
Carries messages
up and down,
to/from the brain
 Spinal nerves: come in pairs (roots) off of spinal
cord
Connected to spinal cord by:
Posterior (dorsal) root – sensory (into) neurons
Anterior (ventral) root – motor (exit) neurons
In the back;
Out the front
Meninges