Term
| Stuctural Divisions of the PNS |
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Definition
| CRANIAL and SPINAL nerves |
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Term
| Functional Divison of the PNS (3) |
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Definition
SOMATIC (general body)
AUTONOMIC (viscera - organs)
ENTERIC (intestines - GIT) |
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Term
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Definition
INFORMATION CARRYING FIBRES
(generally white matter)
- afferent (sensory)
- efferent (motor)
INTEGRATING, PROCESSING AREAS
- (Areas of grey matter) |
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Term
| How many pairs of spinal/cranial nerves are there? |
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Definition
31 pairs SPINAL
12 pairs CRANIAL |
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Term
| Spinal nerves are... (mixed/sensory/motor?) |
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Definition
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Term
| Integrating, proccessing areas can either be.. |
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Definition
GREY matter IN CNS (cortex or nuclei)
GREY matter OUTSIDE CNS (ganglia) - (collection of neuron cell bodies associated with PNS nerves) |
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Term
| Where do dorsal root ganglia form and what do they contain? |
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Definition
- On the dorsal nerve root near the Spinal Cord.
- Contains cell bodies of SOMATIC SENSORY NEURONS |
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Term
| Visceral ganglia are located where? |
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Definition
Close to body organs
i.e, (parasympathetic ganglia) |
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Term
| Some ganglia are located.. |
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Definition
| In front of vertebra (prevertebral)
Along side of the vertebral (paravertebral) - |
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Term
| ENDOneurium is around what? |
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Definition
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Term
| PERIneurium bundles what together? |
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Definition
| Bundles a number of neurons together to form a FASICLE |
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Term
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Definition
| A number of fasicles together to form a nerve |
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Term
| What are peripheral nerves made up of? And are bundled together in what? |
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Definition
Thousands of axons of neurons
Bundled together in connective tissue sheaths |
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Term
Dorsal roots contain..
Ventral roots contain.. |
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Definition
sensory neurons
motor neurons |
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Term
| How do nerves emerge from the spinal chord? |
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Definition
As 2 roots..
- Ventral (anterior)
- Dorsal (posterior) |
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Term
| Do motor and sensory fibers run side by side in the spinal nerve? |
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Definition
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Term
| How many spinal nerve regions are there and how are they named |
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Definition
| 5. Named for POINT OF EXIT from the spinal chord |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
| Because the spinal nerves are so short, what do they divide into when they exit the spinal chord? |
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Definition
| Dorsal ramus and Ventral ramus |
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Term
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Definition
- Travels posteriorly.
- Sensory from skin (back)
- Motor to muscles of the back |
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Term
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Definition
- Travels anteriorly
- Everything else
- Therefore, Ventral ramus is LARGER |
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Term
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Definition
| One spinal cord segment supplies one area. Simple movements. (IE, back muscles, intercostals , abdominal muscles.) |
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Term
| Which spinal nerves are classed as segmented? |
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Definition
| T 2-12 (run between ribs as intercostal nerves) |
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Term
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Definition
| - A number of spinal chord segments supplies an area. For coordinated muscle activity. ie, neck and limbs. Need a PLEXUS. All nerves (except T 2-12 - contribute to a plexus |
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Term
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Definition
Interlacing nerve network.
Each muscle in a limb recieves its nerve supply from more than one spinal nerve |
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Term
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Definition
| Cervical, Brachial, Lumbar, Sacral |
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Term
| Cervical plexus (C 1-4) mostly locally supply what? |
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Definition
| Sensory skin to neck and shoulder and motor muscles of same region AND nerve to diaphragm (PHRENIC C 3,4,5) |
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Term
| Brachial plexus (C 5-8 and T 1) supplies where? |
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Definition
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Term
| The brachial plexus consists of 5 nerve roots which form the nerves named... |
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Definition
| Radial, Ulna, Median, Axillary, Musculocutaneous (sensory and motor arm muscles) |
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Term
| Sacral Plexus is usually linked with what region? |
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Definition
| LUMBAR (therefore Lumbosacral plexus) |
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Term
| Which nerves make up the Sacral plexus and which area do they supply? |
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Definition
| L 4,5 - S 1-5, C 0. Posterior, hip and lower limbs |
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Term
| Spinal Nerves - C - T - L - S - C |
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Definition
| Cervical - Thoracic - Lumbar - Sarcal - Coccygeal |
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