Autonomics Flashcards
What is the afferent part formed by?
GVA fibers
What is the efferent part formed by?
GVE fibers
Where do the preganglionic sympathetic axons arise from?
IML T1 -T4, enter sympathetic chain via white rami
All sympathetic fibers in the head are
Post-ganglionic
Parietal innervation of face
external carotid plexus (nerve) from the superior cervical ganglion following the branches of the external carotid artery
Parietal innervation of the occipital portion
- Dorsal branches of the cervical spinal nerves (greater occipital n.)branches of the cervical spinal nerves (greater occipital n.)
** Ventral branches of the cervical spinal nerves – cervical plexus (lesser occipital nerve, greater auricular nerve)
What does the external carotid plexus innervate?
Large salivary glands
What does the internal carotid plexus innervate?
Vessels of the brain, glands of the middle ear, small salivary glands, eye (pupillary dilator muscle, ciliary body, tarsal muscle of Muller)
Where are the preganglionic cell bodies for parasympathetics?
Brainstem
What hitchhikes off CN V?
CN III, VII, IX
Olfactory nerve
SVA -> sensory
Optic nerve
SSA -> sensory
Oculomotor
GSE, GVE -> motor
Trochlear
GSE -> motor
Trigeminal
GSA, SVE -> both
Abducens
GSE -> motor
Facial
SVE, GSA, SVA, GVA, GVE-P -> both
Vestibulocochlear
SSA, SSE -> sensory
Glossopharyngeal
SVE, GSA, SVA, GVA, GVE-P -> both
Vagus
SVE, GSA, SVA, GVA, GVE-P -> both
Accessory
GSE -> motor
Hypoglossal
GSE -> motor
What are the ciliary ganglion roots?
Sensory, sympathetic, motor
What passes through the ciliary ganglion without synapse?
Sympathetic & sensory fibers
Where is the nerve to pterygoid canal formed?
Middle cranial fossa via the union of greater petrosal nerve from CN VII and deep petrosal nerve from internal carotid plexus
Lesion of the parasympathetic fibers innervating the lacrimal gland results in..
Dry eye, may lead eventually to loss of vision
Postganglionic sympathetic axons arise from…
Cervical ganglion and travel in cavernous plexus
Where do sympathetic travel without synapse for small salivary and lacrimal gland?
Pterygopalatine ganglion
What is the parasympathetic innervation of submandibular & sublingual glands?
Preganglionic parasympathetic axons:
1. course in CN VII (chorda tympani)
2. join the lingual nerve in the infratemporal fossa
3. synapse in the submandibular ganglion
Postganglionic parasympathetic axons innervate:
1. Submandibular
2. Sublingual
3. lingual salivary glands
Where do parasympathetic for large salivary glands synapse?
Otic ganglion
Sympathetic innervation of pharynx/larynx
- Preganglionic perikarya are located in the IML cell column (T1 – 4)
- Preganglionic fibers synapse in the sympathetic chain ganglia
- Postganglionic fibers leave the chain at the superior cervical ganglion as laryngopharyngeal branches
Horner syndrome
Visceral sympathetic lesion (1,2,5,6) and parietal sympathetic lesion (3,4)
