Exam 1/2 Review - Autonomic Nervous System Flashcards
Where are preganglionic neurons of the sympathetic nervous system located?
Lateral gray horns of spinal cord
T1-L2(L3)
Myelinated preganglionic axons exit the ventral ramus of the spinal nerves and enter the sympathetic trunk as what?
White communicating ramus
Inferior cervical ganglion and first thoracic ganglion are called?
Stellate ganglion
What levels of the spinal cord are gray communicating rami found?
All levels!
Postganglionic sympathetic fibers to the head all have their cell bodies in the:
Superior cervical ganglion
Which part of the ANS transmits fibers to the hindgut derivatives?
preganglionic fibers from S2-S4
Which part of the ANS transmits fibers to the foregut and midgut derivatives?
myelinated preganglionic fibers from the vagus nerve (CNX)
The sweat glands of the face and neck, and salivary glands, are supplied by what plexus of SNS fibers?
External carotid plexus
The tympanic plexus receives SNS fibers from the:
Internal carotid plexus
The branches of the maxillary division receive their SNS fibers from the deep petrosal nerve, which receives them from the:
Internal carotid plexus
Two main groups of SNS fibers leave the internal carotid plexus (via the cavernous sinus) and run through which ganglia?
Ciliary ganglion - to supply dilator of pupil and vasculature of eye
Pterygopalatine ganglion - to supply maxillary division
Postganglionic parasympathetic fibers to the parotid gland originate in what ganglion?
Otic ganglion via the Auriculotemporal Nerve (V3)
The nerve supplying preganglionic parasympathetic fibers to the otic ganglion exits the skull through what ganglion?
Foramen ovale (lesser petrosal nerve)
If the major sensory nerve connected to the cilary ganglion is lost, what would be the symptom?
Loss of corneal reflex (via loss of long ciliary nerve from Nasociliary branch of V1)
If there is a lesion between the zygomatic branch of V2 and the lacrimal nerve of V1, what fibers to the lacrimal gland are lost?
Postganglionic PNS fibers from the pterygopalatine ganglion (*Note: fibers of origin: greater petrosal nerve of CN VII)
The submandibular ganglion is suspended from what nerve branch?
Lingual nerve of V3
Taste fibers from the chorda tympani have their cells of origin in what ganglion?
Geniculate ganglion (of CN VII)
From what ganglion do the nasopalatine nerve and posterior nasal branches receive their postganglionic parasympathetic fibers?
Pterygopalatine ganglion (from pre-PNS fibers of greater petrosal nerve)
If the greater petrosal nerve is lesioned before it synapses in the pterygopalatine ganglion, what types of fibers to the greater and lesser palatine nerves would be lost?
- Postganglionic parasympathetic fibers from the pterygopalatine ganglion
- Taste fibers from (CNVII)
If the greater petrosal nerve is lesioned (hint: but NOT its counterpart in the pterygoid canal) before it synapses in the pterygopalatine ganglion, what types of fibers to the greater and lesser palatine nerves WOULD still be received?
- Postganglionic sympathetic fibers from the deep petrosal nerve (originally from internal carotid plexus)
- General sensory fibers from the trigeminal nerve (V2 - maxillary division)
If the glossopharyngeal nerve branch to the otic ganglion is cut, what type of fibers does the parotid gland lose?
Postganglionic parasympathetic fibers
Glands in the nasal cavity and palate no longer have parasympathetic function. What ganglion would these fibers have originated from?
Pterygopalatine - suspended from Maxillary Division
