Vestibulo-oculomotor fibers

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Brain: Vestibulo-oculomotor fibers
NeuroNames	ancil-409

The vestibulo-oculomotor fibers are the portion of the medial longitudinal fasciculus which ascends to the oculomotor nucleus from the vestibular nuclei.

[edit] See also

Vestibulo-ocular reflex

Human brain, rhombencephalon, metencephalon: pons (TA A14.1.05.101–604, GA 9.785)

Dorsal/
(tegmentum)

Surface	Cerebellopontine angle · Superior medullary velum · Sulcus limitans · Medial eminence · Facial colliculus

White: Sensory/ascending	Trapezoid body/VIII · Trigeminal lemniscus (Dorsal trigeminal tract, Ventral trigeminal tract) · Medial lemniscus · Lateral lemniscus MLF, III, IV and VI: Vestibulo-oculomotor fibers Anterior trigeminothalamic tract · Central tegmental tract

White: Motor/descending	ICP (Vestibulocerebellar tract) MLF, III, IV and VI: Vestibulospinal tract (Medial vestibulospinal tract, Lateral vestibulospinal tract)

Grey: Cranial nuclei	afferent: GSA: Principal V/Spinal V · VIII-c (Dorsal, Anterior)/VIII-v (Superior) efferent: SVE: Motor V · VII · GSE: VI · GVE: VII: Superior salivary nucleus

Other grey	Apneustic center · Pneumotaxic center (Medial parabrachial nucleus) · Lateral parabrachial nucleus · Superior olivary nucleus · Caerulean nucleus

Ventral/
(base)

Grey	Pontine nuclei

White: Motor/descending	Corticospinal tract · Corticobulbar tract · Corticopontine fibers MCP (Pontocerebellar fibers)

Surface	Basilar sulcus

Other grey: Raphe/
reticular

Reticular formation (Caudal, Oral, Tegmental, Paramedian) · Raphe nuclei (Median)

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)

Human brain: mesencephalon (midbrain) (TA A14.1.06, GA 9.800)

Tectum
(Dorsal)

Surface	Corpora quadrigemina: Inferior colliculi (Brachium of inferior colliculus), Superior colliculi (Brachium of superior colliculus)

Grey matter	Pretectal area

White: Sensory/ascending	Spinotectal tract · Central tegmental tract

White: Motor/descending	Tectospinal tract

Peduncle
(Ventral)

White: Sensory/ascending	lemnisci (Medial, Lateral) · Ascending MLF (Vestibulo-oculomotor fibers) · Spinothalamic tract · Anterior trigeminothalamic tract · Dentatothalamic tract

White: Motor/descending	Rubrospinal tract · Rubro-olivary tract · Descending MLF

Grey: cranial nuclei	GSA (V: Mesencephalic) - GSE (III: Oculomotor, IV: Trochlear) - GVE (III: Edinger-Westphal)

Grey: other	Periaqueductal gray/Raphe nuclei (Dorsal raphe nucleus) Ventral tegmental area • Pedunculopontine nucleus • Red nucleus riMLF

Ventricular system	Cerebral aqueduct

Base

White: Motor/descending	Cerebral crus: Corticospinal tract · Corticobulbar tract · Corticopontine tract/Frontopontine fibers/Temporopontine fibers

Grey: Substantia nigra	Pars compacta · Pars reticulata

Surface	Superior cerebellar peduncle (Decussation of superior cerebellar peduncles) · Interpeduncular fossa

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)

Sensory system: Visual system and eye movement pathways

Visual perception

1° (Bipolar cell of Retina) → 2° (Ganglionic cell) → 3° (Optic nerve → Optic chiasm → Optic tract → LGN of Thalamus) → 4° (Optic radiation → Cuneus and Lingual gyrus of Visual cortex → Blobs → Globs)

Muscles of orbit

Tracking	Smooth pursuit: Parietal lobe · Occipital lobe Saccade: Frontal eye fields Nystagmus → Fixation reflex → PPRF

Horizontal gaze	PPRF → Abducens nucleus → MLF → Oculomotor nucleus → Medial rectus muscle

Vertical gaze	Rostral interstitial nucleus → Oculomotor nucleus, Trochlear nucleus → Muscles of orbit

Vestibulo-ocular reflex	Semicircular canal → Vestibulocochlear nerve → Vestibular nuclei → Abducens nucleus → MLF (Vestibulo-oculomotor fibers) → Oculomotor nucleus → Medial rectus muscle

Pupillary reflex

Pupillary dilation	1° (Posterior hypothalamus → Ciliospinal center) → 2° (Superior cervical ganglion) → 3° (Sympathetic root of ciliary ganglion → Nasociliary nerve → Long ciliary nerves → Iris dilator muscle)

Pupillary light reflex (constriction)	1° (Retina → Optic nerve → Optic chiasm → Optic tract → Pretectal nucleus) → 2° (Edinger-Westphal nucleus) → 3° (Oculomotor nerve → Parasympathetic root of ciliary ganglion → Ciliary ganglion) → (4° Short ciliary nerves → Iris sphincter muscle)

Accommodation vergence	1° (Retina → Optic nerve → Optic chiasm → Optic tract → Visual cortex → Brodmann area 19 → Pretectal area) → 2° (Edinger-Westphal nucleus) → 3° (Short ciliary nerves → Ciliary ganglion → Ciliary muscle)

Circadian rhythm

Retina → Hypothalamus (Suprachiasmatic nucleus)

anat(g/a/p)/phys/devp/prot

noco/cong/tumr, epon

proc, drug(S1A/1E/1F/1L)

Auditory and vestibular pathways

inner ear: Hair cells → Spiral ganglion → Cochlear nerve ^VIII →

pons: Cochlear nuclei (Anterior, Dorsal) → Trapezoid body → Superior olivary nuclei →

midbrain: Lateral lemniscus → Inferior colliculi →

thalamus: Medial geniculate nuclei →

cerebrum: Acoustic radiation → Primary auditory cortex

inner ear: Vestibular nerve ^VIII →

pons: Vestibular nuclei (Medial vestibular nucleus, Lateral vestibular nucleus)

cerebellum: Flocculonodular lobe

spinal cord: Vestibulospinal tract (Medial vestibulospinal tract, Lateral vestibulospinal tract)

thalamus: Ventral posterolateral nucleus

cerebrum: Vestibular cortex

Vestibulo-oculomotor fibers

anat(e/p)/phys/devp

noco/cong, epon

proc, drug(S2)

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