Cranial Nerve Summaries (p 162-166)

Question 0

II Optic

Primary Sensory Neuron Cell Body Location - Secondary… - Function

Answer 0

Inner nuclear lamina of retina (bipolar neuron) - Ganglion lamina of Retina (ganglion cell) - Vision Special Sensory

Question 1

I Olfaction

Primary Sensory Neuron Cell Body Location - Secondary… - Function

Answer 1

Olfactory Mucosa (olfactory bipolar neuron) - Olfactory Bulb (mitral cell)- Smell Special Sensory

Question 2

III Oculomotor

Primary Sensory Neuron Cell Body Location - Secondary … - Function

Answer 2

Gasserion (trigeminal, semilunar) ganglion - Spinal Trigeminal Nuc. - Somatic Sensation
Mesencephalic Nucleus - Oculomotor Nuclear Complex (motor) - Motor Reflex
Mesencephalic Nucleus - Spinal Trigeminal Nuc. - Somatic Sensation

Question 3

IV Trochlear

Primary sensory neuron cell body location - Secondary … - Function

Answer 3

Gasserion (trigeminal, semilunar) ganglion - Spinal Trigeminal Nuc. - Somatic Sensation
Mesencephalic Nucleus - Trochlear Motor Nuc. - Motor Reflex
Mesencephalic Nucleus - Spinal Trigeminal Nuc. - Somatic Sensation

Question 4

V Trigeminal

Primary sensory neuron cell body location - Secondary … - Function

Answer 4

Gasserion (trigeminal, semilunar) ganglion - Principal Sensory Nuc. - Somatic Sensation
Gasserion (trigeminal, semilunar) ganglion - Spinal Trigeminal Nuc. - Somatic Sensation
Mesencephalic Nucleus - Trigeminal Motor Nuc. - Motor Reflex
Mesencephalic Nucleus - Spinal Trigeminal Nuc. - Somatic Sensation

Question 5

VI Abducens/ Abducent

Primary sensory neuron cell body location - Secondary … - Function

Answer 5

Gasserion (trigeminal, semilunar) ganglion - Spinal Trigeminal Nuc. - Somatic Sensation
Mesencephalic Nucleus - Abducent Motor Nuc. - Motor Reflex
Mesencephalic Nucleus - Spinal Trigeminal Nuc. - Somatic Sensation

Question 6

VII Facial

Primary sensory neuron cell body location - Secondary … - Function

Answer 6

Geniculate ganglion - Spinal Trigeminal Nuc. - Somatic Sensation
Geniculate ganglion - Nuc. Solitarius (gustatory nuc.) - Taste/ Sensation/ Special Visceral

Question 7

VIII Vestibulocochlear

Primary sensory neuron cell body location - Secondary … - Function

Answer 7

Vestibular (Scarpa’s) Ganglion (Bipolar Neurons) - Vestibular Nuclear Complex- Equilibrium/ Special Sensory
Spiral Ganglion of the Cochlea (bipolar neurons) - Cochlear Nuc. - Hearing/ Special Sensory

Question 8

IX Glossopharyngeal

Primary sensory neuron cell body location - Secondary … - Function

Answer 8

Jugular (superior glossopharyngeal) Ganglion - Spinal Trigeminal Nuc. - Somatic Sensation
Petrosal (inferior glossopharyngeal) Ganglion - Nuc. Solitarius (Cardiorespiratory Nuc.) - Visceral Sensation
Petrosal (inferior glossopharyngeal) Ganglion - Nuc. Solitarius (Gustatory Nuc.) - Taste Sensation/ Special Visceral

Question 9

X Vagus

Primary sensory neuron cell body location - Secondary … - Function

Answer 9

Superior Vagal (jugular) ganglion - Spinal Trigeminal Nuc. - Somatic Sensation
Inferior Vagal (nodose) ganglion - Nuc. Solitarius (cardiorespiratory nuc.) - Visceral Sensation
Inferior Vagal (nodose) ganglion - Nuc. Solitarius (gustatory nuc.) - Taste sensation/ Special Visceral

Question 10

III Oculomotor (Branchial & Somatic Motor)
Cell body location &
Target Muscles

Answer 10

Oculomotor Nuclear Complex
Extrinsic eye muscles: superior rectus, medial rectus, inferior rectus, and inferior oblique;
also levator palpebrae superior

Question 11

IV Trochlear (Branchial & Somatic Motor)
Cell body location &
Target Muscles

Answer 11

Trochlear Motor Nuc.

Superior oblique, extraocular muscle

Question 12

Vc Mandibular Division, Trigeminal (Branchial & Somatic Motor)
Cell body location &
Target Muscles

Answer 12

Trigeminal Motor Nuc.

Temporalis, Masseter, Medial & Lateral Pterygoid, Mylohyoid, Anterior Belly of Digastric

Question 13

VI Abducent or Abducens (Branchial & Somatic Motor)
Cell body location &
Target Muscles

Answer 13

Abducens Motor Nuc.

lateral rectus extraocular muscle

Question 14

VII Facial (Branchial & Somatic Motor)
Cell body location &
Target Muscles

Answer 14

Facial Motor Nuc.
Muscles of Face, Scalp, Auricle;
Stapedius, Stylohyoid, Posterior Belly of Digastric

Question 15

IX Glossopharngeal (Branchial & Somatic Motor)
Cell body location &
Target Muscles

Answer 15

Nuc. Ambiguus

stylopharyngeus

Question 16

X Vagus (Branchial & Somatic Motor)
Cell body location &
Target Muscles

Answer 16

Nuc. Ambiguus

Pharyngeal constrictors, muscles of the soft palate, cricothyroid, palatoglossus

Question 17

XI Spinal Accessory (Branchial & Somatic Motor)
Cell body location &
Target Muscles

Answer 17

Nuc. Ambiguus- intrinsic muscles of larynx

Spinal Nuc. (C1-C5 near ventral horn location) - Sternocleidomastoideus & Trapezius

Question 18

XII Hypoglossal (Branchial & Somatic Motor)
Cell body location &
Target Muscles

Answer 18

Hypoglossal Motor Nuc.

Genioglossus, styloglossus, hyoglossus, & intrinsic muscles of the tongue

Question 19

III Oculomotor (Parasympathetic)
Nuc. of Origin - Ganglion - Target Organ

Answer 19

Accessory Oculomotor (Edinger-Westphal) - Ciliary - Ciliaris, Sphincter Pupillae (intrinsic eye ms)

Question 20

VII Facial (Parasympathetic)
Nuc. of Origin - Ganglion - Target Organ

Answer 20

Superior Salivatory - Submandibular - Submandibular & sublingual glands
Superior Salivatory - Pterygopalatine (sphenopalatine, Meckel’s) - Lacrimal gland

Question 21

IX Glossopharyngeal (Parasympathetic)
Nuc. of Origin - Ganglion - Target Organ

Answer 21

Inferior Salivatory - Otic (Arnold’s) - Parotid Gland

Question 22

X Vagus (Parasympathetic)
Nuc. of Origin - Ganglion - Target Organ

Answer 22

Dorsal vagal - Intramural - Viscera of Neck, thorax, abdomen, & upper pelvis

Question 23

I Olfactory (Exit Sites)
Cranial Vault Location - Exit Name - Opens Into

Answer 23

Anterior Cranial Fossa - Cribriform Plate - Nasal Cavity

Question 24

``` II Optic (Exit Sites) Cranial Vault Location - Exit Name - Opens Into ```

Answer 24

Middle Cranial Fossa - Optic Canal - Orbit

Question 25

``` III Oculomotor (Exit Sites) Cranial Vault Location - Exit Name - Opens Into ```

Answer 25

Middle Cranial Fossa - Superior Orbital Fissure - Orbit

Question 26

``` IV Trochlear (Exit Sites) Cranial Vault Location - Exit Name - Opens Into ```

Answer 26

Middle Cranial Fossa - Superior Orbital Fissure - Orbit

Question 27

Va Opthalmic division, Trigeminal (Exit Sites) | Cranial Vault Location - Exit Name - Opens Into

Answer 27

Middle Cranial Fossa - Superior Orbital Fissure - Orbit

Question 28

Vb Maxillary division, Trigeminal (Exit Sites) | Cranial Vault Location - Exit Name - Opens Into

Answer 28

Middle Cranial Fossa - Foramen Rotundum - Pterygopalatine Region

Question 29

Vc Mandibular division, Trigeminal (Exit Sites) | Cranial Vault Location - Exit Name - Opens Into

Answer 29

Middle Cranial Fossa - Foramen Ovale - Infratemporal Region

Question 30

``` VI Abducent (Exit Sites) Cranial Vault Location - Exit Name - Opens Into ```

Answer 30

Middle Cranial Fossa - Superior Orbital Fissure - Orbit

Question 31

``` VII Facial (Exit Sites) Cranial Vault Location - Exit Name - Opens Into ```

Answer 31

Posterior Cranial Fossa - Internal Acoustic Meatus - Parotid Region

Question 32

``` VIII Vestibulocochlear (Exit Sites) Cranial Vault Location - Exit Name - Opens Into ```

Answer 32

Posterior Cranial Fossa - Internal Acoustic Meatus - No Exit

Question 33

``` IX Glossopharyngeal (Exit Sites) Cranial Vault Location - Exit Name - Opens Into ```

Answer 33

Posterior Cranial Fossa - Jugular Foramen - Neck

Question 34

``` X Vagus (Exit Sites) Cranial Vault Location - Exit Name - Opens Into ```

Answer 34

Posterior Cranial Fossa - Jugular Foramen - Neck

Question 35

XI Spinal Accessory (Exit Sites) | Cranial Vault Location - Exit Name - Opens Into

Answer 35

Posterior Cranial Fossa - Jugular Foramen - Neck

Question 36

``` XII Hypoglossal (Exit Sites) Cranial Vault Location - Exit Name - Opens Into ```

Answer 36

Posterior Cranial Fossa - Hypoglossal Canal - Neck

Question 37

Facial Nerve (Exit Openings for Facial Nerve & Branches from Skull) Exit Name - Opens Into

Answer 37

Stylomastoid Foramen - Parotid Region

Question 38

Vidian Nerve (Exit Openings for Facial Nerve & Branches from Skull) Exit Name - Opens Into

Answer 38

Vidian Canal - Pterygopalatine Region

Question 39

Chorda Tympani Branch (Exit Openings for Facial Nerve & Branches from Skull) Exit Name - Opens Into

Answer 39

Petrotympanic Fissure - Infratemporal region