Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

36 Cards in this Set

  • Front
  • Back
How long is the spinal cord?

What encases it?
45 cm

vertebral foramina
the spinal cord decreases in diameter and terminates at the____________
Filum Terminale
2 fissures
1-________ __________ _________

2-________ __________ __________

which is wider?
posterior median suculus

anterior median fissure--widest
How is spinal cord divided?
into 31 segments
part of spinal cord
cell bodies exterior to spinal cord contain sensory neuron cell bodies whose axons project out thru interverebral foramina to form dorsal roots and ventral roots
dorsal root ganglia
distal root fibers of dorsal roots and ventral roots wound together
spinal nerves
overlapping membranes that provide protection to the spinal cord
spinal meninges
outer most meningeal
epidural space
space between duramater and vertebral foramina
epidural space
medial meningeal layer
subdural space
subarchoid space
space between duramater and arachoid
subdural space
space between arachoid and pia mater
filled with network of collagen
filled with cerebrospinal fluid
where spinal tap occurs
subarachoid space
5ml extracted between L3 and L4
spinal tap
innermost meningeal layer
direct contact with spinal cord and tissues
pia mater
Inner region of gray matter is shaped like a ?

What is the center with cerebrospinal fluid?

Central canal
projections of gray matter into white matter
3- types
horn with cell bodies for somatic and autonomic sensory neurons
posterior gray horn
horn with cell bodies for somatic and motor neurons
anterior gray horn
horn that contains autonomic motor neurons
lateral gray horn
surround central canal in gray matter and contains interneurons
gray commissures
surrounds gray matter
divided into ascending and descending tracks
relays impulse to and from brain
white matter
formed by the connection of ventral and dorsal roots
How many pairs?
identified by?
Spinal nerves
adjacent vertebrae
spinal nerves are encapsulated by:
1-outer collagen layer
2-surrounds fascicles
3-surrounds individual axons within fascicle
a branch in a spinal nerve
branch in the spinal nerve -sensory motor neuron of back muscles/skin
dorsal ramus
branch in spinal nerve
semspry motor neuron of sides, body cavities and limbs.
ventral ramus
complex interwoven network of spinal nerves-4 types
nerve plexus
nerve plexus
c1-c5 ventral rami for neck
phrenic nerve to diaphram for breathing
cervical plexus
nerve plexus
c5-t1 ventral rami
pectoral girdle and upper limbs
Brachial plexus
nerve plexus
t12-L4 ventral rami
pelvic girdle and upper limbs
Lumbar plexus
nerve plexus
lower limbs
Sacral plexus
spinal nerve communication

receives stimulus from sensory neuron
Posterior Gray Horn
Spinal nerve communication

processes stimulus and sends response to either the anterior gray horn or the white matter
gray commisseur
spinal nerve communication
receives response from gray commisseur;
then goes to ventral rami then to nerve plexus
Anterior gray horn
spinal nerve communication
receives response from gray commisseur then to ascending tracks to brain
white matter
-Conduction-white matter relay to and from brain
-Locomotion for generating repetitive skeletal motions
Functions of Spinal cord