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