Chapter 13
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19 terms
Terms | Definitions |
|---|---|
 Name the components of the central nervous system and peripheral nervous system | CNS - brain and spinal cord PNS - cranial and spinal nerves |
| Dorsal Root Ganglia | contains cell bodies of sensory neurons |
| Dorsal Roots | bring sensory information into the spinal cord |
| Ventral Roots | outgoing motor commands |
| Spinal Nerve | sensory and motor roots are bound together into a single spinal nerve |
| The Dura Mater | very strong and fibrous outer layer |
| Epidural Space | space outside the dura that contains areolar tissue, blood vessels and adipose tissue |
| Subarachnoid Space | contains cerebrospinal fluid |
| Explain white matter and gray matter | gray matter (cell bodies) is the region of integration and command initiation. white matter (axons) carries info from place to place |
| A disease that damages myelin sheaths would affect which portion of the spinal cord? | the columns or white matter |
| Dermatome | an area of skin that is supplied with the nerve fibers of a single spinal root |
| Name the plexus of origin and the function of the Phrenic nerve | cervical plexus - major nerve that helps with breathing |
| Name the 4 major nerves originating from the brachial plexus that innervate the arm and forearm | Musculocutaneous nerve - flexor muscles of the arm Radial nerve - extensor muscles of the arm and forearm Median nerve - flexor muscles of the forearm Ulnar nerve - flexor muscles of the forearm |
| Name the plexus of origin and the function of the Femoral nerve | lumbar plexus - extension of the knee |
| Name the plexus of origin and the function of the Sciatic nerve | sacral plexus - flexion of the knee |
| Injury to which of the nerve plexuses would interfere with the ability to breathe | cervical plexus |
| Reflex | a rapid, automatic response to a specific stimulus |
| Stretch reflex & example | provides automatic regulation of skeletal muscle length ex: the patellar reflex |
| Withdrawal reflex & example | move affected parts of the body away from stimulus ex: flexor reflex |
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