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CRANIAL NERVES. III, V, VII, IX, X. Parasympathetic Cranial Nerves. Oculomotor (III) Facial (VII) Glossopharyngeal (IX) Vagus (X). Oculomotor Nerve. Modalities: GSM: From: Oculomotor complex. To: 4 of 6 extrinsic muscles of the eye. Levator palpebrae superioris.

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CRANIAL NERVES

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Cranial nerves l.jpg

CRANIAL NERVES

III, V, VII, IX, X


Parasympathetic cranial nerves l.jpg

Parasympathetic Cranial Nerves

  • Oculomotor (III)

  • Facial (VII)

  • Glossopharyngeal (IX)

  • Vagus (X)


Oculomotor nerve l.jpg

Oculomotor Nerve

  • Modalities:

    GSM:

    From:

    Oculomotor complex.

    To:

    4 of 6 extrinsic muscles of the eye.

    Levator palpebrae superioris.


Oculomotor nerve4 l.jpg

Oculomotor Nerve

  • Modalities:

    GVM:

    Preganglionics:

    From:

    Edinger-Westphal nucleus.

    To:

    Ciliary ganglion.

    Postganglionics:

    To:

    Sphincter pupillae.


Trigeminal nerve l.jpg

Trigeminal Nerve

  • Three branches:

    Ophthalmic.

    Maxillary.

    Mandibular.

  • Major sensory nerve to face.

    (Also supplies tongue, but this is general sensory, not special sensory for taste.)

  • Motor to muscles of mastication:

    Muscles derived from first pharyngeal arch (mandibular arch).


Trigeminal nerve8 l.jpg

Trigeminal Nerve

  • Not parasympathetic.

  • Modalities:

    SVM:

    From:

    Masticator nucleus.

    To:

    Muscles of mastication.

    Tensor veli palatini.

    Tensor tympani.

    Mylohyoid.

    Anterior belly of digastric.


Trigeminal nerve9 l.jpg

Trigeminal Nerve

  • Modalities:

    GSS:

    Cell bodies of sensory neurons in trigeminal (semilunar) ganglion.

    Sensory to:

    Face and anterior scalp.

    Conjunctiva and eyeball.

    Paranasal sinuses.

    Nasal and oral cavities.

    Anterior 2/3 of tongue.

    External surface of ear drum.

    Dura of middle and anterior cranial fossae.


Facial nerve l.jpg

Facial Nerve

  • Primary motor nerve to muscles of facial expression.

    Supplies muscles derived from second pharyngeal arch (hyoid arch).

    Branches:

    Temporal.

    Zygomatic.

    Buccal.

    Mandibular.

    Cervical.


Facial nerve11 l.jpg

Facial Nerve

  • Carries taste from anterior 2/3 of tongue.

  • Carries motor to submandibular and sublingual salivary glands.

  • Carries motor to lacrimal gland and mucous glands in nose.


Facial nerve13 l.jpg

Facial Nerve

  • Modalities:

    GVM:

    Preganglionics:

    From:

    Superior salivatory and lacrimal nuclei.

    To:

    Submandibular/sublingual ganglia.


Facial nerve14 l.jpg

Facial Nerve

  • Modalities:

    GVM:

    Postganglionics:

    To:

    Lacrimal gland.

    Submandibular gland.

    Sublingual gland.

    Mucous glands of mouth and nose.


Facial nerve15 l.jpg

Facial Nerve

  • Modalities:

    GSS:

    Cell bodies of sensory neurons in geniculate ganglion.

    Supplies sensory to part of external ear.


Facial nerve16 l.jpg

Facial Nerve

  • Modalities:

    SVS:

    Cell bodies of sensory neurons in geniculate ganglion.

    Carries taste from anterior 2/3 of tongue.

    Carries taste from hard and soft palates.


Glossopharyngeal nerve l.jpg

Glossopharyngeal Nerve

  • Motor to parotid gland.

  • Carries taste from posterior 1/3 of tongue.

  • Supplies general sensation to posterior 1/3 of tongue.

  • Supplies muscles derived from third pharyngeal arch.


Glossopharyngeal nerve18 l.jpg

Glossopharyngeal Nerve

  • Modalities:

    SVM:

    From:

    Nucleus ambiguous.

    To:

    Stylopharyngeus.


Glossopharyngeal nerve19 l.jpg

Glossopharyngeal Nerve

  • Modalities:

    GVS:

    From:

    Carotid body.

    Carotid sinus.


Glossopharyngeal nerve21 l.jpg

Glossopharyngeal Nerve

  • Modalities:

    GVM:

    Preganglionics:

    From:

    Inferior salivatory nucleus.

    To:

    Otic ganglion.

    Postganglionics:

    To:

    Parotid gland.


Glossopharyngeal nerve22 l.jpg

Glossopharyngeal Nerve

  • Modalities:

    GSS:

    From:

    Posterior 1/3 of tongue.

    External ear.

    Middle ear cavity.


Glossopharyngeal nerve23 l.jpg

Glossopharyngeal Nerve

  • Modalities:

    SVS:

    From:

    Posterior 1/3 of tongue (taste).


Vagus nerve l.jpg

Vagus Nerve

  • Motor to muscles of larynx:

    Muscles of fourth and fifth pharyngeal arches.

    Important in swallowing and speaking.

  • Major parasympathetic nerve to thoracic and abdominal organs:

    Parasympathetic supply distally to left colic (splenic) flexure.


Vagus nerve25 l.jpg

Vagus Nerve

  • Modalities:

    SVM:

    From:

    Nucleus ambiguous.

    To:

    Almost all muscles of pharynx and larynx.


Vagus nerve26 l.jpg

Vagus Nerve

  • Modalities:

    GVS:

    From:

    Larynx and pharynx.

    Thoracic and abdominal viscera.

    GSS:

    From external ear and pharynx.


Vagus nerve27 l.jpg

Vagus Nerve

  • Modalities:

    GVM:

    Preganglionics:

    From:

    Dorsal motor nucleus.

    To:

    Myenteric plexus of wall of gut tube.


Vagus nerve28 l.jpg

Vagus Nerve

  • Modalities:

    GVM:

    Postganglionics:

    Smooth muscle of pharynx and larynx.

    Smooth muscle of most of wall of gut tube.


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