Autonomics

Question 1

What is the afferent part formed by?

Answer 1

GVA fibers

Question 2

What is the efferent part formed by?

Answer 2

GVE fibers

Question 3

Where do the preganglionic sympathetic axons arise from?

Answer 3

IML T1 -T4, enter sympathetic chain via white rami

Question 4

All sympathetic fibers in the head are

Answer 4

Post-ganglionic

Question 5

Parietal innervation of face

Answer 5

external carotid plexus (nerve) from the superior cervical ganglion following the branches of the external carotid artery

Question 6

Parietal innervation of the occipital portion

Answer 6

• 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)

Question 7

What does the external carotid plexus innervate?

Answer 7

Large salivary glands

Question 8

What does the internal carotid plexus innervate?

Answer 8

Vessels of the brain, glands of the middle ear, small salivary glands, eye (pupillary dilator muscle, ciliary body, tarsal muscle of Muller)

Question 9

Where are the preganglionic cell bodies for parasympathetics?

Answer 9

Brainstem

Question 10

What hitchhikes off CN V?

Answer 10

CN III, VII, IX

Question 11

Olfactory nerve

Answer 11

SVA -> sensory

Question 12

Optic nerve

Answer 12

SSA -> sensory

Question 13

Oculomotor

Answer 13

GSE, GVE -> motor

Question 14

Trochlear

Answer 14

GSE -> motor

Question 15

Trigeminal

Answer 15

GSA, SVE -> both

Question 16

Abducens

Answer 16

GSE -> motor

Question 17

Facial

Answer 17

SVE, GSA, SVA, GVA, GVE-P -> both

Question 18

Vestibulocochlear

Answer 18

SSA, SSE -> sensory

Question 19

Glossopharyngeal

Answer 19

SVE, GSA, SVA, GVA, GVE-P -> both

Question 20

Vagus

Answer 20

SVE, GSA, SVA, GVA, GVE-P -> both

Question 21

Accessory

Answer 21

GSE -> motor

Question 22

Hypoglossal

Answer 22

GSE -> motor

Question 23

What are the ciliary ganglion roots?

Answer 23

Sensory, sympathetic, motor

Question 24

What passes through the ciliary ganglion without synapse?

Answer 24

Sympathetic & sensory fibers

Question 25

Where is the nerve to pterygoid canal formed?

Answer 25

Middle cranial fossa via the union of greater petrosal nerve from CN VII and deep petrosal nerve from internal carotid plexus

Question 26

Lesion of the parasympathetic fibers innervating the lacrimal gland results in..

Answer 26

Dry eye, may lead eventually to loss of vision

Question 27

Postganglionic sympathetic axons arise from…

Answer 27

Cervical ganglion and travel in cavernous plexus

Question 28

Where do sympathetic travel without synapse for small salivary and lacrimal gland?

Answer 28

Pterygopalatine ganglion

Question 29

What is the parasympathetic innervation of submandibular & sublingual glands?

Answer 29

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

Question 30

Where do parasympathetic for large salivary glands synapse?

Answer 30

Otic ganglion

Question 31

Sympathetic innervation of pharynx/larynx

Answer 31

• 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

Question 32

Horner syndrome

Answer 32

Visceral sympathetic lesion (1,2,5,6) and parietal sympathetic lesion (3,4)