Vestibulo-oculomotor Fibers - See Also

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)

M: CNS

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)
Tegmentum
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

M: CNS

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)

M: EYE

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

noco/cong/tumr, epon

proc, drug (S1A/1E/1F/1L)
Auditory and vestibular pathways
Auditory
  • 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
Vestibular
  • 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

M: EAR

anat (e/p)/phys/devp

noco/cong, epon

proc, drug (S2)



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