03 - Autonomic Innervation Flashcards Preview

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Flashcards in 03 - Autonomic Innervation Deck (18):
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Where is the superior cervical ganglion located?

Anterior to C1-C4

1

Where does the sympathetic innervation to the head & neck come from?

How does it reach the head & neck?

Cervical sympathetic trunks.

Each trunk originates from three ganglia (superior, middle and inferior).

They are continuous with part of the the sympathetic chain.

They pass vertically up to the base of the skull.

They lie on the prevertebral fascia and lie deep to the carotid sheath

2

How does the superior cervical ganglion hitch-hike to reach its targets?

Internal and external carotid arteries

3

What does the superior cervical ganglion give branches to form?

Pharyngeal plexus

upper four cervical nerves

superior cardiac branch to the cardiac plexus

4

Where is the middle cervical ganglion located?

Anterior to C6 vertebrae

Anterior to the inferior thyroid artery

5

How does the middle cervical ganglion hitch-hike to reach its targets?

Inferior thyroid artery

6

What does the middle cervical ganglion give branches to form?

5th and 6th cranial nerves

 middle cardiac branch to the cardiac plexus

thyroid branches

7

Where is the inferior cervical ganglion located?

Anterior to C7 vertebrae

8

How does the inferior cervical ganglion hitch-hike to reach its targets?

With the vertebral artery

9

What does the inferior cervical ganglion give branches to form?

7th and 8th cranial nerves

the inferior cardiac branch of the cardiac plexus

10

In 80% of people, what does the inferior ganglion combine with?

The thoracic ganglion to form the stellate ganglion

11

What happens if there is interruption to the cervical sympathetic trunk?

How does this present?

Horner's syndrome, loss of sympathetic stimulated functions

Miosis- constriction of pupil

Ptosis- drooping of the eyelid

Vasodilation- redness and increased temp of the skin

Anhydrosis - absence of sweating

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12

What are the pre-ganglionic and post-ganglionic fibres of the ciliary ganglion?

What do the post-ganglionic fibres supply?

Pre-ganglionic parasympathetic fibres from the Edinger-Westphal nucleus

. They hitchhike with the oculomotor nerve

They synapse with post-ganglionic fibres at the ciliary ganglion, which hitch-hike on short ciliary nerves

They innervate sphincter pupillae and ciliary muscles for accommodation

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13

What are the pre-ganglionic and post-ganglionic fibres of the pterygopalatine ganglion? What do the post-ganglionic fibres supply?

Pre-ganglionic parasympathetic fibres from the superior salivatory nucleus.

They hitchhike with the greater petrosal branch of CN7

They synapse with post-ganglionic parasympathetic fibres at the pterygopalatine ganglion.

They leave by hitch-hiking on the mandibular division of CN5

They supply lacrimal glands, mucosa glands of the nose and palate

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14

What are the pre-ganglionic and post-ganglionic fibres of the submandibular ganglion? What do the post-ganglionic fibres supply?

Pre-ganglionic parasympathetic fibres from the superior salivatory nucleus.

Reach ganglion by hitch-hiking on the chorda tympani of the facial nerve and lingual nerve of the mandibular nerve.

Post-ganglionic fibres leave and travel directly to the submandibular and sublingual glands to supply them

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15

What are the pre-ganglionic and post-ganglionic fibres of the otic ganglion?

What do the post-ganglionic fibres supply?

Pre-ganglionic parasympathetic fibres from inferior salivatory nucleus.

They hitch-hike with lesser petrosal nerve off glossopharnygeal nerve to reach the ganglion

Post-ganglionic fibres hitch-hike along auriculotemporal nerve (off mandibular off trigeminal) to innervate parotid gland

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16

What is the parasympathetic supply to the head and neck by the vagus nerve?

Pre-ganglionic fibres from the dorsal vagal motor nucleus.

They don't synapse on discrete autonomic ganglia.

They synapse with post-ganglionic cells in the walls of their target tissue

17

What happens if the ciliary ganglion is damaged?

Adie's pupil.

There is a loss of innervation to the sphincter pupillae so the pupil is permanently dilated and doesn't constrict in the presence of light