Term
|
Definition
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Term
|
Definition
| Rapid, automatic response to specific stimuli |
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Term
| 12.2 Number of Spinal Cord Segments |
|
Definition
31;
8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal |
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Term
| 12.2 Gray matter greatest in spinal cord segments dedicated to... |
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Definition
| Sensory and motor control of limbs |
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Term
| 12.2 Cervical enlargement innervates... |
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Definition
|
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Term
| 12.2 Lumbar enlargement innervates... |
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Definition
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Term
| 12.2 Spinal nerves contain... |
|
Definition
| Axons of sensory AND motor neurons |
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Term
|
Definition
|
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Term
|
Definition
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Term
| 12.2 Dorsal root ganglion contains... |
|
Definition
| cell bodies of sensory neurons |
|
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Term
|
Definition
| Specialized membrane surrounding spinal cord |
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Term
| 12.3 3 Spinal Meningeal Layers |
|
Definition
1. Dura Mater; tough
2. Arachnoid Mater
3. Pia Mater; delicate, blood vessels found here |
|
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Term
| 12.3 2 Between Meningeal Layers |
|
Definition
1. Subarachnoid Space; CSF found here, acts as a shock absorber
2. Epidural Space; contains fat |
|
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Term
| 12.3 Denticulate Ligament |
|
Definition
| Prohibits superior/inferior spinal cord movement |
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Term
|
Definition
|
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Term
|
Definition
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Term
|
Definition
| Specific skin region monitored by pair of spinal nerves |
|
|
Term
12.4 Structural Org. of Gray Matter
Posterior Gray Horn...
(1 of 3) |
|
Definition
| Somatic and visceral sensory nuclei |
|
|
Term
12.4 Structural Org. of Gray Matter
Lateral Gray Horn...
(2 of 3) |
|
Definition
1. thoracic & lumbar sections only
2. contains visceral motor nuclei |
|
|
Term
12.4 Structural Org. of Gray Matter
Anterior Gray Horn...
(3 of 3) |
|
Definition
| Contains somatic motor nuclei |
|
|
Term
12.4 Functional Org. of Gray Matter
Nuclei
(1 of 4) |
|
Definition
| functional groups of cell bodies of neurons in gray matter of spinal cord |
|
|
Term
12.4 Functional Org. of Gray Matter
Sensory Nuclei
(2 of 4) |
|
Definition
| receive and relay sensory info |
|
|
Term
12.4 Functional Org. of Gray Matter
Motor Nuclei
(3 of 4) |
|
Definition
| issue motor commands to peripheral effectors |
|
|
Term
12.4 Functional Org. of Gray Matter
Gray Commissures
(4 of 4) |
|
Definition
| contain axons that cross from 1 side of the cord to the other |
|
|
Term
12.4 Functional Org. of White Matter
Tracts (white matter)
(1 of 3) |
|
Definition
| bundles of axons in CNS (analogous to nerve in PNS) |
|
|
Term
12.4 Functional Org. of White Matter
Ascending Tracts
(2 of 3) |
|
Definition
| Carry sensory info to brain |
|
|
Term
12.4 Functional Organization of White Matter
Descending Tracts
(3 of 3) |
|
Definition
|
|
Term
| 12.6 How a spinal nerve distributes motor commands that originate in motor nuclei of thoracic or lumbar segments of spinal cord |
|
Definition
1. Travels along ventral root (contains axons of somatic and visceral motor neurons) of each spinal nerve
2. Ventral and dorsal root join to form spinal nerve
3. Dorsal ramus carries commands to skin and skel. muscles of back
4. Ventral ramus carries commands to ventrolateral body surf., body wall and limbs |
|
|
Term
|
Definition
1. Somatic motor command--->to skel. musc. of back
2. Visceral motor command---> postganglionic fibers to smooth muscles, glands of back |
|
|
Term
|
Definition
1. Somatic motor command---> to skel. musc. of body wall, limbs
2. Visceral motor command---> postganglionic fibers to smooth muscl, glands of body wall and limbs |
|
|
Term
12.6 Motor Commands
White Ramus Communicans
(1 of 4) |
|
Definition
1. Carries commands to sympathetic ganglion
2. white (myelinated) |
|
|
Term
12.6 Motor Commands
Gray Ramus Communicans
(2 of 4) |
|
Definition
1. Contains postganglionic fibers that innervate glands in smooth muscle in body wall/limbs
2. unmyelinated-gray |
|
|
Term
12.6 Motor Commands
Rami Communicans
(3 of 4) |
|
Definition
| White and gray rami together, communicating branches |
|
|
Term
12.6 Motor Commands
Sympathetic Nerve
(4 of 4) |
|
Definition
1. Contains preganglionic and postganglionic fibers
2. Innervates structures in thoracic cavity |
|
|
Term
| 12.6 Sensory info is collected from... |
|
Definition
| peripheral structures and delivered to sensory nuclei in spinal cord |
|
|
Term
12.6 Sensory Info.
Sympathetic nerves carries...
(1 of 4) |
|
Definition
| sense. info. from visceral orgs. |
|
|
Term
12.6 Sensory Info.
Ventral Ramus carries...
(2 of 4) |
|
Definition
| sense. info. from ventrolateral body surf., body wall and limbs |
|
|
Term
12.6 Sensory Info.
Dorsal Ramus carries...
(3 of 4) |
|
Definition
| Sense. info. from skin/skel. musc. of back (dorsal horn) |
|
|
Term
12.6 Sensory info.
Dorsal root of each spinal nerve carries...
(4 of 4) |
|
Definition
| Sense. info to spinal cord |
|
|
Term
|
Definition
| interwoven network of nerves |
|
|
Term
|
Definition
1. consists of vent. rami of spin. nerves C1-C5
2 Branches innervate:
-neck musc.
-skin of neck
-skin of sup. part of chest
-diaphragm |
|
|
Term
| 12.7 Cervical plexus and diaphragm |
|
Definition
1. phrenic nerve
2. formed by branches from C3-C5
3. provides all nerve supply to diaphragm |
|
|
Term
|
Definition
1. innervates pectoral girdle and upper limbs
2. vent. rami C4-T1 |
|
|
Term
| 12.8 Nerves originate from TRUNKS |
|
Definition
| large bundles of axons contributed by several spinal nerves |
|
|
Term
| 12.8 Nerves originate from CORDS |
|
Definition
| smaller branches that originate at trunks |
|
|
Term
| 12.9 Lumbar and Sacral Plexuses |
|
Definition
| innervate pelvic girdle and lower limbs |
|
|
Term
|
Definition
|
|
Term
|
Definition
1. spinal nerves L4-S4
2. contains sciatic nerve |
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