Osteology 3 - Base of skull and Cranial nerves

Head and Neck anatomy - Cranial nerves

What is Cranial Nerve I? And What foramen does it pass through?

What is Cranial Nerve I? And What foramen does it pass through?

Olfactory & Cribriform plate in the Ethmoid bone

Olfactory Nerve (I) has type of neurons? and function?

Sensory neurons. Smell (Special)

What is Cranial Nerve II? And What foramen does it pass through?

Optic Nerve & Optic canal on the sphenoid bone

Optic Nerve (II) has what type of neurons? and what function?

Sensory neurons. Vision (Special)

What is Cranial Nerve III? And What foramen does it pass through?

Oculomotor Nerve & Superior orbital fissure (Sphenoid)

Oculomotor (III) has what type of neurons? and what function?

Motor - Eye movement
Parasympathetic - Pupil constriction

What is Cranial Nerve IV? And What foramen does it pass through?

Trochlear Nerve & Superior orbital fissure (Sphenoid)

Trochlear (IV) has what type of neurons? and what function?

Motor - Eye movement

What is Cranial Nerve V? And What foramen does it pass through?

Trigeminal
V1 (Ophthalmic) - Superior orbital fissure (Sphe

V2 (Maxillary) - Foramen Rotundum

V3 (Mandibular) - Foramen Ovale

Trigeminal Nerve (V) has what type of neurons? and what function?

V1 (Ophthalmic) - Sensory

V2 (Maxillary) - Sensory

V3 (Mandibular) - Sensory and Motor

Function:
General sensation of face, scalp teeth
Muscles of Mastication

What is Cranial Nerve VI? And What foramen does it pass through?

Abducens & Superior orbital fissure (Sphenoid)

Abducens (VI) has what type of neurons? and what function?

Motor - Eye movement

What is Cranial Nerve VII? And What foramen does it pass through?

Facial Nerve & Internal acoustic meatus (Temporal Bone)

Facial Nerve (VII) has what type of neurons? and what function?

Sensory - Taste (Special) anterior 2/3 of the tongue
Motor - Facial expression
Parasympathetic - Salivary gland secretion (Submandibular, Sublingual and lacrimal gland)

What is Cranial Nerve VIII? And What foramen does it pass through?

Vestibulocochlear Nerve & Internal acoustic meatus

Vestibulocochlear (VIII) has what type of neurons? and what function?

Sensory - Hearing and balance (Special)

What is Cranial Nerve IX? And What foramen does it pass through?

Glossopharyngeal Nerve & Jugular foramen (Temporal bone)

Glossopharyngeal Nerve (IX) has what type of neurons? and what function?

Sensory - Taste (Special) sensation for the posterior 1/3 of the tongue

Motor - Swallowing

Parasympathetic - Salivation from the parotid gland

What is Cranial Nerve X? And What foramen does it pass through?

Vagus Nerve & Jugular foramen (Temporal Bone)

Vagus Nerve (X) has what type of neurons? and what function?

Sensory - Taste (Special) sensation of the epiglottis and pharynx

Motor - Swallowing and speaking

Parasympathetic - Regulation of Heart rate, digestive system, gastrointestinal motility and secretion

What is Cranial Nerve XI? And What foramen does it pass through?

Accessory Nerve & Jugular Foramen

Accessory Nerve (XI) has what type of neurons? and what function?

Motor - Neck and shoulder muscle control

What is Cranial Nerve XII? And What foramen does it pass through?

Hypoglossal Nerve & Hypoglossal canal (Occipital Bone)

Hypoglossal Nerve (XII) has what type of neurons? and what function?

Motor - Tongue movement