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40 Cards in this Set
- Front
- Back
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what is the level of the conus medularis
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L2
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what are the components of the CNS
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Brain, Brainstem, spinal cord
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what are the components of the PNS
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cranial nerves, spinal nerves, autonomic nervous system
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what are lamina
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aggregations of nerve cell populations inside the spinal cord (called nuclei elsewhere in the cns)
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where does the posterior root enter the spinal cord at
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posterolateral sulcus
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where does the anterior root leave the spinal cord at
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anterolateral sulcus
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what is a denticulate ligament
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ligament that anchors the spinal cord and meniges
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what are the components of the somatic nervous system
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afferent neurons (input)
efferent neurons (output) |
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what are the components of the visceral nervous system
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afferent neurons from viscera
autonomic nervous system efferent to smooth muscle, cardiac muscle, and glands |
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where would a csf sample be taken from
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lumobsacral cistern
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what are the two regions of the gray matter in the spinal cord
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posterior gray horn = sensory afferent nerve populations
anterior gray horn = motor efferent nerve cell populations |
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what fibers run in the anterior root
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motor only
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what fibers run in the posterior root
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sensory only
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what fibers run in the primary rami
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both motor and sensory
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what are the two divisions of the primary rami
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short posteriorly directed rami and long anteriorly directed rami
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what are ganglia
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agregations of nerve cell bodies outside the CNS
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what kind of rami are in limb plexi
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anterior rami only
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what are the two limb plexi and their spinal levels
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brachial plexus C5-T1
lumbosacral plexus L1-S5 |
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what is the anterior division of the lumbosacral plexus
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iliohypogastric, ilioinguinal, gentiofemoral, obturator
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what is the posterior division of the lumbosacral plexus
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lateral femoral cutaneous nerve, femoral nerve
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which part of the lumbosacral trunk has both anterior and posterior divisions
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sciatic nerve
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what are the two divisions of the autonomic nervous system
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sympathetic (thoracolumbar)
parasympathetic (craniosacral) |
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what cranial and spinal nerves are involved in the parasympathetic nervous system
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cranial = 3, 7, 9, 10
S2, S3, S4 |
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what is the functional role of the parasympathetic system
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homeostasis
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what types of muscle are innervated by the parasympathetic system
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cardiac muscle
glandular smooth muscle smooth muscle of visceral tubes |
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what are the spinal levels involved in the sympathetic nervous system
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T1-T12
L1-L2 |
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what is the functional role of the sympathetic nervous system
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stress
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what muscle type is innervated by the sympathetic nervous system
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vascular arteriolar smooth muscle. Allows blood to flow to where we need it
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how is the autnomic nervous system structurally defined
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as a two neuron system
preganglionic and postganglionic |
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where are preganglionic cell bodies found
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in the lateral gray horn
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where are postganglionic cell bodies found
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sympathetic trunk
prevertebral ganglia |
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preganglionic fibers are
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myleniated
parasympathetic long sympathetic short |
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postganglionic fibers
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unmyleniated
parasympathetic short sympathetic long |
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what is the ganglia associated with the parasympathetic system
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terminal ganglia
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what is the ganglia associated with the sympathetic system
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paravertebral and prevertebral
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what are the neurotransmitters associated with the autonomic nervous system
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acetylcholine at all ganglionic sites, and effector sites of the parasympathetic sites
norepinephrine at the effector sites of the sympathetic sites |
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sensory pathway are located where in the spinal cord
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more lateral
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motor pathways are located where in the spinal cord
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more medial
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what is a funiculus
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multiple tracts that run together
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what is a tract
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nerve fibers ascending or decending in the cns
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