7) Autonomic Innervation Flashcards Preview

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Flashcards in 7) Autonomic Innervation Deck (19):
1

Is the ANS part of peripheral or central nervous system?

Peripheral

2

What parts of the brain can control/effect the ANS?

Central control from hypothalamus
Limbic system can have effects due to emotional response

3

What are the target tissues of the ANS?

Smooth muscle and glands

4

Which spinal cord segments provide sympathetic innervation to the head and neck?

T1 and T2

5

Describe the route of sympathetic nerve fibres to the head and neck:

Preganglionic fibres ascend up sympathetic chain to synapse at superior or middle ganglion. Post ganglion fibres 'hitch hike' on carotid arteries via carotid plexus

6

Where does the carotid plexus around external carotid artery end?

Face - sweat glands and BVs

7

Where does the carotid plexus around internal carotid artery end?

Eye (via ophthalmic artery) - tarsal muscle (contraction of eyelid) and dilator pupillae

8

How do sympathetic fibres get to the eyelid?

Oculomotor nerve

9

How do sympathetic fibres get to muscles of iris?

Trigeminal nerve branch

10

What is Horner's syndrome?
What are some symptoms?

Interruption to sympathetic supply of head and neck
Miosis, partial ptosis, anhidrosis

11

What are some causes of Horner's syndrome?

Carotid artery dissection
Apical lung tumour

12

What nerves do parasympathetic nerve fibres 'hitch hike' on?

Oculomotor, facial, glossopharyngeal and vagus

13

Describe the route of parasympathetic fibre associated with the oculomotor nerve:
(include what the fibres innervate)

Pass through ciliary ganglion, post ganglionic associated with trigeminal nerve branch, carried to sphincter pupillae and ciliary body (lens changes)

14

Describe the route of parasympathetic fibre associated with the glossopharngeal nerve:
(include what the fibres innervate)

Pass through otic ganglion, post ganglionic associated with trigeminal branch, carried to parotid gland

15

Describe the route of parasympathetic fibre associated with the vagus nerve:
(include what the fibres innervate)

Synapse near target tissue
Glands in laryngopharynx , larynx, trachea and oesophagus
Thorax and abdomen

16

What 3 branches does the facial nerve split into in the petrous part of the temporal bone?

Chorda tympani, greater petrosal and nerve to stapedius

17

Describe the route of parasympathetic fibre associated with the chorda tympani:
(include what the fibres innervate)

Submandibular ganglion then hitch hike on trigeminal to submandibular and sublingual salivary glands

18

Describe the route of parasympathetic fibre associated with the greater petrosal nerve:
(include what the fibres innervate)

Pterygopalantine ganglion then hitch hike on trigeminal to lacrimal and mucosal (nasal) glands

19

Where will a lesion to facial nerve affect all PSNS fibres?

Before geniculate ganglion