Cranial Nerves. IIIrd Nerve 3 Oculomotor Oculomotor nucleus (motoneurons for eye muscles) Oculomotor nerve (to eye muscles & pupil muscles) Edinger.

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Presentation transcript:

Cranial Nerves

IIIrd Nerve 3 Oculomotor

Oculomotor nucleus (motoneurons for eye muscles) Oculomotor nerve (to eye muscles & pupil muscles) Edinger Westphal nucleus (constricts the pupil)

(from oculomotor) (from Edinger-Westphal)

IVth Nerve 4 Trochlear

IV Nerve 4 Trochlear

Trochlear nerve (to eye muscles) Trochlear nucleus (motoneurons for eye muscles)

(from trochlear)

Vth Nerve 5 Trigeminal

Main sensory trigeminal nucleus Trigeminal nerve Spinal trigeminal nucleus Motor trigeminal nucleus Spinal trigeminal nucleus (pain & temperature from head) Motor trigeminal nucleus (motoneurons for jaw muscles) Main sensory trigeminal nucleus (touch, conscious spindle & joint from head) Trigeminal nerve (afferent: touch, muscle spindle/joint, pain & temperature from head efferent: chewing muscles)

Main sensory trigeminal nucleus (left) Motor Trigeminal Nucleus (right) Mesencephalic trigeminal tract (left) Mesencephalic trigeminal nucleus (left) Spinal trigeminal nerve (left) (1° axons on way to terminate in spinal trigeminal nucleus) Main sensory trigeminal nucleus (right) Spinal Trigeminal Nucleus (right) Trigeminal Nerve (left) Trigeminal Nerve (right) Spinal trigeminal nucleus (left)

(from motor trigeminal nuc) (to main sensory & spinal trigeminal nucs) ALSO, UNCON PROP FROM JAW MUSCLES (to mesencephalic trigeminal nuc)

maxillary mandibular Trigeminal ganglion ophthalmic

Vth nerve – somatosensory component (from face skin)

VIth Nerve 6 Abducens

IV Nerve 4 Trochlear

24 Abducens nucleus Abducens nerve

(from abducens)

VIIth Nerve 7 Facial

Facial nucleus Facial nerve Genu of the Facial nerve Abducens nucleus

30 Solitary tract (inside) Solitary nucleus (outside) Spinal trigeminal nucleus Abducens nucleus Superior salivatory nucleus Facial intermediate nerve part of facial nerve carrying: Motor 1) motor output from the superior salivatory nucleus to some salivary glands (GVE) Sensory 1) taste information from the anterior 2/3 of the tongue to solitary nucleus via the solitary tract (SVA) 2) touch information from a small patch of skin on the ear and behind the ear to spinal trigeminal nucleus (GSA) Facial intermediate nerve

(from sup salivatory nuc) (from facial nuc) (to spinal trigeminal nuc) (to rostral solitary n) MOTOR SENSORY

VIIIth Nerve 8 Vestibular-Cochlear

(from inner ear to vestib & cochlear nucs)

IXth Nerve Glossopharyngeal

(from ambiguus nuc) (from inf salivatory nuc) MOTOR SENSORY (to caudal solitary nuc) (to spinal trigeminal nuc) (to rostral solitary nuc)

Xth Nerve Vagus

(from ambiguus nuc) MOTOR SENSORY (from dorsal motor nucleus of Vagus) (to caudal solitary nuc) (to spinal trigeminal nuc)

(from ambiguus nuc) MOTOR SENSORY (from dorsal motor nucleus of Vagus) (to caudal solitary nuc) (to spinal trigeminal nuc)

(from ambiguus nuc) MOTOR SENSORY (from dorsal motor nucleus of Vagus) (to caudal solitary nuc) (to spinal trigeminal nuc)

XIth Nerve Spinal Accessory

(from spinal accessory nucleus in cervical cord)

XIIth Nerve Hypoglossal

(from hypoglossal nuc)

Cranial Nerve Summary

The End