Flashcards in Anatomy Deck (111)
What is a collection of nerve cell bodies in the CNS called?
What is a collection of nerve cell bodies in the PNS called?
What do dendrites do?
Transport signal towards cell body
What do axons do?
Transport signals away from the cell body
What cells produce the myelin sheath in the PNS?
What cells produce the myelin sheath in the CNS?
What neuronss are usually motor polar?
What neurons are usually unipolar?
Where is the cell body located in unipolar neurons?
Where is the cell body located in multipolar neurons?
What are nerves?
Bundles of neurons surrounded by connective tissue and blood vessels.
What are the two types of nerves?
Single or mixed modality
What does it mean to be a mixed modality nerve?
Mixture of somatic motor somatic sensory and sympathetic grouped together.
Sympathetic outflow is...
Thoracolumbar T1 to L2
Where are sympathetic cell bodies located ?
Upon leaving the spinal column where do the sympathetic neurons pass?
What are the four routes presynaptic axons take in the sympathetic trunk?
1. Ascend then synapse
2. Synapse at level of entry
3. Descend and then synapse
4. Pass through sympathetic trunk to synapse at prevertebral ganglia.
If a sympathetic nerve synapses within the sympathetic trunk it...
Synapses at paravertebral ganglia
If a sympathetic nerve synapses outside of the sympathetic trunk it....
Synapses at prevertebral ganglia
What make up spinal nerves?
Somatic motor sensory and sympathetic neurones
In order to supply abdominopelvic organs where do sympathetic neurones synapse?
List the 4 Prevertebral ganglia associated with the abdominopelvic organs?
Superior Mesenteric Ganglion
Inferior Mesenteric Ganglion
Roughly where does the celiac ganglion innovate?
Roughly where does the aorticorenal ganglion innovate?
Roughly where does the SMG innovate?
Roughly where does the IMG innovate?
Pelvic and Perineal plexus
Where do sympathetic neurones directly synapse onto the target organ?
Adrenal Medulla on the kidney
Parasympathetic output is....
What cranial nerves are parasympathetic?
CN III Oculomotor
CN VII Facial
CN IX Glossopharyngeal
CN X Vagus