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Cranial nerves carry (3)
- Afferent fibers
- Somatic efferent fibers
- Visceral efferent and afferent fibers
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Which of the following cranial nerves carry preganglionic parasympathetic fibers from the brain? (4)
preganglionic fibres hitchhike over these nerves
- III-- ciliary ganglion
- VII-- spheno/pterygopalatine and submandibular ganglia
- IX--otic ganglion
- X--heart and upper GI viscera (not the ganglia)
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Parasympathetic nerve fibers have ____ preganglionic fiber and ____ postganglionic fibers
preganglionic fibers secrete:
postganglionic fibers secrete:
long
short
- preganglionic fibers secrete: AcH
- postganglionic fibers secrete: AcH
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Sympathetic nerve fibers have ____ preganglionic fibers and ____ post ganglionic fibers
preganglionic fibers secrete:
postganglionic fibers secrete:
short, long
- preganglionic fibers secrete: AcH
- postganglionic fibers secrete: NE
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Preganglionic fibers originate form the sacral spinal nerves (S2, S3, S4) and form...
the pelvic splanchnic nerves
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What are the three nerve plexues?
Cranial, Brachial, Lumbosacral
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Cervical plexus originates from? innervates?
C1-C4
sensory and motors fibers to the muscles and skin of the neck
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Brachial plexus originates from? innervates?
C5-T1
supplies sensory and motor fibers to the brachium, antebrachium and hand
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Nerve in the cervical plexus? originates from? innervates?
Phrenic
C3, C4, C5
diaphragm
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Nerve in the brachial plexus? area?
Ulnar nerve (funny bone)
Runs medial to medial epicondyle
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Lumbosacaral plexus originates from? innervates?
L1-S3
supplies sensory and motor fibers to the lower appendages
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Nerve in the lumbosacaral plexus? area?
Sciatic nerve, runs under gluteus maximus
biggest nerve in the body
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All sympathetic pre-ganglionic fibers originate where?
T1-L2
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Parasympathetic preganglionic fiber originate from
S2, S3, S4
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Supplies muscles on the posterior (dorsal side)
Dorsai Rami
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supplies anterior portion of the body and plexuses
ventral rami
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