Autonomic nervous system Flashcards Preview

202: Theme 2, Sensory inputs and motor outputs > Autonomic nervous system > Flashcards

Flashcards in Autonomic nervous system Deck (44)
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31

Inferior mesenteric ganglion

Pre-vertebral ganglion
- Lumbar splanchnic nerves [preganglionic fibres] synapse here

Supplies large intestine

32

Sacral sympathetic trunk ganglia
- How many?
- Post-ganglionic exit

4 ganglia in total

Post-ganglionic exit:
- Grey rami communicans to spinal nerves [supplying lower lim]

- Sacral splanchnic nerves to pelvis organs.

33

Parasympathetic preganglionic neurones

Located in:
- Brainstem [become cranial nerves]
- Grey matter spinal cord [S2-4]---> pelvic splanchnic

34

Location of preganglionic neuronal cell bodies

Cranial nerve nuclei

35

CN 3 nucleus

Edinger-Westphal nucleus

36

CN 7 nucleus

Superior-salivatory nucleus

37

CN 9 nucleus

Inferior salivatory nucleus

38

Vagus nerve nucleus

Nucleus ambiguous

Dorsal motor nucleus

39

Ciliary ganglion

Parasympathetic ganglion
- Oculomotor nerve synapses here
- Innervates sphincter pupillae [pupil constriction]

40

Submandibular ganglion

Parasympathetic ganglion
- CN VII synapses here
- Innervates submandibular gland
= watery saliva

41

Otic ganglion

Parasympathetic ganglion
- Glossopharyngeal nerve synapses here.
- Innervate parotid gland= watery saliva

42

Sacral parasympathetic innervation
- Preganglionic exit
- Innervation

Preganglionic fibres exits via pelvic splanchnic nerves

Innervates pelvic organs
- Forms pelvic plexus
- Preganglionic fibres synapse directly onto target organs

43

Sacral parasympathetic function
- Bladder
- Rectum
- Sexual function

Bladder= urination
- Contracts bladder wall
- Inhibits sphincter

Rectum= defecation
- Inhibits sphincter

Sexual function = vasodilation of erectile tissue

44

Enteric nervous system plexi

Auerbach/ Myenteric plexus = smooth muscle contraction regulation

Meissner's/ Submucosal plexus = regulation of glandular secretions