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25 Cards in this Set

  • Front
  • Back
Name the 3 layers of Connective tissue that surround the spinal cord
Duramater
Anachnoid
PiaMater
Describe the duramater
tough, dense, irregular C.T. from occipital bone down to 2nd sacral vertebrae, it is a two layered sheet of fibrous connective tissue
Describe the Anachnoid
avascular (no blood supply), forms a loose brain covering
Describe the PiaMater
directly up against spinal cord itself supplies blood to cord. Composed of delicate connective tissue and is richly invested with tiny blood vessels. CLings tightly to the brain
Identify the spaces that occur between the connective tissue layers
*Subdura space, contains a film of luid, below duramater
*Subarachnoid space, below the arachnoid
*Epidural space; outside (area between bony vertebrae and the dura mater of the spinal cord)
Conus medullaris
where spinal cord ends (L2)
Filum terminale
a fibrous extension of the conus medullaris covered by pia mater, attaches to the coccyx so that spinal cord does not move around
Cauda equine
Collection of nerve roots at the inferior end of the vertebral canal (horses tail) nerve endings attached to the conus
Cervical enlargement
swelling in cervical part of spinal cord and spinal nerves leave and innovate upper limbs
Lumbar enlargement
swelling in lumbar part of spinal cord and spinal nerves leave and innovate lower limbs
Explain how nerves are named
named from the area in which they originate and the number in which they come out (C1,C2)
Give number of pairs of spinal nerves attached to
1.cervical nerves
2.thoracic nerves
3.lumbar nerves
4.sacral nerves
5.coccyl nerves
1. 8
2. 12
3. 5
4. 5
5. 1
define dermatone
a diagnostic tool that allows you to know where damage originates and where spinal nerves end
Reflex arc
Reaction to a stimulus and eventual response
Receptor
picks up stimuli
Sensory
carries info to CNS to spinal cord or brain
Integrating Center
sorts out response
Motor Neuron
sends out response
Effector
does response
plexus
network (nerves/blood vessels)
meninges
3 connective tissues layers that cover and protect spinal cord
ramus
branch
dorsal root *ganglion
swelling of dorsal (no axon)
*a collection of cell neurons
Ipsilateral reflex
response is on same side as stimuli
contralateral reflex
response is on opposite side of stimuli