at level of LI/LII, pia mater continues as filum terminale to meet with dura and arachnoid at coccygeal ligament.
|bifurcation of spinal nerve||
posterior primary division IS posterior cutaneous branch
anterior primary division GIVES RISE to lateral cutaneous branch and anterior cutaneous branch
combined from ventral rami of cervical, lumbar and sacral spinal nerves
accelerated via nodes of Ranvier
General Visceral Afferent fibers (chemo-, mechano- and stretch receptors)
axons of neurons inside CNS/spinal cord ( they are visceral, motor)
axons of neurons outside CNS/spinal cord ( they are visceral, motor)
|cranial nerves assoc. w visceral fibers (both sensory & motor)||
CN- III, VII, IX, X
|spinal segments assoc. w sympathetic nervous system||
T1 thru L2
|spinal segments assoc. w parasympathetic nervous system||
S2, S3, S4
CN3, CN7, CN9, CN10
convergence of paravertebral sympathetic trunk (anterior to coccyx)
|white ramus communicans||
myelinated connection from ant. rami of spinal nerves to sympathetic paravertebral ganglia.
Sentence: Only associated with spinal nerves of T1-L2.
|gray ramus communicans||
made of unmyelinated postganglionic sympathetic fibers going from paravertebral ganglia back to anterior ramus of spinal nerve. medial to white ramus communicans.
Sentence: Associated with all spinal nerves... not just T1-L2.
|superior cervical ganglion||
paravertebral sympathetic ganglion through which all innervation of of head and face occur.
Sentence: All preganglionic fibers emerge through spinal nerve at T1
made of preganglionic fibers which synapse in sympathetic ganglia at roots of major arteries OR directly with adrenal glands.
|nerves emerging from trunks of the brachial plexus||
2. subclavius nerve