Cranial Nerves & Associated Ganglia And Actions

Front 1

1
what does it do =

Back 1

smell, olfactory afferant N in olfactory bulb

olfactory bulb of telencephalon
Sensory

Hint 1

ASSOCIATED GANGLION:
None

olfactory lesions do not lead to reduced ability to sense pain from nasal epithelium.
Because pain is carried to the central nervous system by the trigeminal nerve

Front 2

2
what does it do =

Back 2

Sensory eyes

visual centers of brain
Sensory

Hint 2

ASSOCIATED GANGLION:
None

Front 3

3
what does it do =

Back 3

4 eye motors

intraocular & 4 extraocular eye muscles
motor

Hint 3

ASSOCIATED GANGLION:
None

Front 4

4
what does it do =

Back 4

Smallest N, Sup-oblique eye

1 extraocular eye muscle
motor

Hint 4

ASSOCIATED GANGLION:
None

Front 5

5
what does it do =

Back 5

Largest N, ophtalamic mandibular maxillary

visceral arch I derivatives

Both
Motor/Sensory

Hint 5

ASSOCIATED GANGLION:
Gasserian
(=semilunar)

Front 6

6
what does it do =

Back 6

lateral rectus myo

1 extraocular eye muscle

motor

Hint 6

ASSOCIATED GANGLION:
None

Front 7

7
what does it do =

Back 7

scalp / face / face-pressure / receive taste

visceral arch II derivatives

Both
Motor/Sensory

Hint 7

ASSOCIATED GANGLION:
geniculate

Front 8

8
what does it do =

Back 8

VESTIBULO: branch of balance / position / moement. COCHLEAR: branch of hearing receptors.

cochlea &
vestibular apparatus
Sensory

Hint 8

ASSOCIATED GANGLION:
vestibular & acoustic

Front 9

9
what does it do =

Back 9

Tongue / pharynx / swallow

visceral arch III derivatives
Both
Motor/Sensory

Hint 9

ASSOCIATED GANGLION:
superior (proximal)
&
inferior (distal or petrosal)

Front 10

10
what does it do =

Back 10

ANS-visceral ctrl fct

visceral arches IV & VI derivatives; heart, visceral organs
Both
Motor/Sensory

Hint 10

ASSOCIATED GANGLION:
jugular
(proximal) & nodose (distal)

Front 11

11
what does it do =

Back 11

-Voluntary swallow of
soft pallet / pharynx.
-Pectoral girdle

visceral arch IV derivatives,
neck,
shoulder

motor

Hint 11

ASSOCIATED GANGLION:
Froriep’s
(degenerate occipital ganglia)

Front 12

12
what does it do =

Back 12

Voluntary motor ctrl ---> tongue

muscles of tongue

motor

Hint 12

ASSOCIATED GANGLION:
None

Front 13

Info
With respect to cranial ganglia, the terms superior (or proximal) and inferior (or distal) indicate position on the cranial nerve relative to the central nervous system (brain and spinal cord). e.g., The jugular ganglion on the Vagus nerve (X) is closer (proximal) to the central nervous system than is the distal nodose ganglion.

Back 13

Neurons whose cell bodies lie in cranial ganglia are sensory in function.

Front 14

info
Cranial nerves and associated ganglia originate from neural ectoderm of brain and spinal cord, from neural crest cells, and from dorsolateral and epibranchial placodal ectoderm. Some cranial nerves are purely sensory (afferent), some purely motor (efferent), and some mixed. Sensory fibers are usually generated by cells from neural crest and/or dorsolateral placodal ectoderm, although epibranchial placodal ectoderm forms some sensory fibers associated with certain visceral (pharyngeal) pouches.
continued =

Back 14

Motor fibers are usually derived from neural ectoderm of the central nervous system (somatic efferent and first order autonomic efferent fibers), but may also be formed by neural crest cells (second order autonomic efferent fibers). Cranial nerves I (olfactory), II (optic), and VIII (auditory) are referred to as “special sensory” because of the great amount of sensory input they provide to the central nervous system.