Dentatothalamic tract: Information from Answers.com

Brain: Dentatothalamic tract
Latin	tractus dentatothalamicus
NeuroNames	hier-525
NeuroLex ID	birnlex_1104

Neuroscience
portal

The dentatothalamic tract (or dentatorubrothalamic tract) is a tract which connects the dentate nucleus and the thalamus.^[1]

The term "dentatorubrothalamocortical" is sometimes used to emphasize termination in the cerebral cortex.^[2]

References

^ Motor Systems
^ Boiten J, Lodder J (February 1990). "Ataxic hemiparesis following thalamic infarction". Stroke 21 (2): 339–40. PMID 2305412.

External links

Krauss JK, Wakhloo AK, Nobbe F, Tränkle R, Mundinger F, Seeger W (December 1995). "Lesion of dentatothalamic pathways in severe post-traumatic tremor". Neurol. Res. 17 (6): 409–16. PMID 8622792.
NIF Search - Dentatothalamic Tract via the Neuroscience Information Framework
http://isc.temple.edu/neuroanatomy/lab/atlas/papc/

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Human brain, rhombencephalon, metencephalon: cerebellum (TA 14.1.07, GA 9.788)

Surface anatomy

Posterior lobe (Horizontal fissure) · Anterior lobe · Flocculonodular lobe (Flocculus, Nodule)

Vermis: posterior (Folium, Tuber, Uvula) · anterior (Central lobule, Culmen, Lingula)

Hemisphere: posterior (Biventer lobule, Cerebellar tonsil) · anterior (Alar central lobule)

Vallecula of cerebellum · Primary fissure

Grey matter

Deep cerebellar nuclei	Dentate · interposed (Emboliform, Globose) · Fastigial

Cerebellar cortex	Molecular layer (Stellate cell, Basket cell) Purkinje cell layer (Purkinje cell, Bergmann glia cell = Golgi epithelial cell) Granule cell layer (Golgi cell, Granule cell, Unipolar brush cell) Fibers: Mossy fibers · Climbing fiber · Parallel fiber

White matter

Internal	Arbor vitae

Peduncles	Inferior (medulla): Dorsal spinocerebellar tract · Olivocerebellar tract · Cuneocerebellar tract · Juxtarestiform body (Vestibulocerebellar tract) Middle (pons): Pontocerebellar fibers Superior (midbrain): Ventral spinocerebellar tract · Dentatothalamic tract · Trigeminocerebellar fibers

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)

Peduncle 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

Peduncle 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

Human brain: diencephalon (TA A14.1.08, GA 9.807)

Epithalamus

Surface	Pineal body · Habenula · Habenular trigone · Habenular commissure

Grey matter	Pretectal area · Habenular nuclei · Subcommissural organ

Thalamus

Surface	Stria medullaris of thalamus · Thalamic reticular nucleus · Taenia thalami

Grey matter/ nuclei	paired: AN · Ventral (VA/VL, VP/VPM/VPL) · Lateral (LD, LP, Pulvinar) · Metathalamus (MG, LG) midline: MD · Intralaminar (Centromedian) · Midline nuclear group · Interthalamic adhesion

White matter	Mammillothalamic fasciculus · Pallidothalamic tracts (Ansa lenticularis, Lenticular fasciculus, Thalamic fasciculus) · PCML (Medial lemniscus, Trigeminal lemniscus) · Spinothalamic tract · Lateral lemniscus · Dentatothalamic tract · Acoustic radiation · Optic radiation · Subthalamic fasciculus · Anterior trigeminothalamic tract Medullary laminae

Hypothalamus

Surface

Median eminence/Tuber cinereum · Mammillary body · Infundibulum

Grey matter

Autonomic zones	Anterior (parasympathetic/heat loss) · Posterior (sympathetic/heat conservation)

Endocrine	posterior pituitary: magnocellular/Paraventricular/Supraoptic (oxytocin/vasopressin) other: parvocellular/Arcuate (dopamine/GHRH) · Preoptic (GnRH) · Suprachiasmatic (melatonin)

Emotion	Lateral (hunger) · Ventromedial (satiety) · Dorsomedial (rage)

White matter

afferent (SN → Medial forebrain bundle) · efferent (Mammillothalamic fasciculus → AN, Stria terminalis → Amygdala, Dorsal longitudinal fasciculus → SC)

Pituitary

Posterior is diencephalon, but anterior is glandular

Subthalamus

Subthalamic nucleus · Zona incerta

Ventricular system:
Third ventricle

recesses: (Optic recess, Infundibular recess, Suprapineal recess, Pineal recess)

Hypothalamic sulcus · Tela chorioidea of third ventricle

Subfornical organ

Apertures: Interventricular/Monro

Posterior commissure

Brain and spinal cord: neural tracts and fasciculi

Sensory/
ascending

PCML

1°: Pacinian corpuscle/Meissner's corpuscle → Gracile fasciculus/Cuneate fasciculus → Gracile nucleus/Cuneate nucleus

2°: → sensory decussation/arcuate fibers (Posterior external arcuate fibers, Internal arcuate fibers) → Medial lemniscus/Trigeminal lemniscus → Thalamus (VPL, VPM)

3°: → Posterior limb of internal capsule → Postcentral gyrus

Anterolateral/
pain

Fast/lateral	1° (Free nerve ending → A delta fiber) → 2° (Anterior white commissure → Lateral and Anterior Spinothalamic tract → Spinal lemniscus → VPL of Thalamus) → 3° (Postcentral gyrus) → 4° (Posterior parietal cortex) 2° (Spinotectal tract → Superior colliculus of Midbrain tectum)

Slow/medial	1° (Group C nerve fiber → Spinoreticular tract → Reticular formation) → 2° (MD of Thalamus) → 3° (Cingulate cortex)

Motor/
descending

Pyramidal	flexion: Primary motor cortex → Posterior limb of internal capsule → Decussation of pyramids → Corticospinal tract (Lateral, Anterior) → Neuromuscular junction

Extrapyramidal	flexion: Primary motor cortex → Genu of internal capsule → Corticobulbar tract → Facial motor nucleus → Facial muscles flexion: Red nucleus → Rubrospinal tract extension: Vestibulocerebellum → Vestibular nuclei → Vestibulospinal tract extension: Vestibulocerebellum → Reticular formation → Reticulospinal tract Midbrain tectum → Tectospinal tract → muscles of neck

Basal ganglia	direct: 1° (Motor cortex → Striatum) → 2° (GPi) → 3° (Lenticular fasciculus/Ansa lenticularis → Thalamic fasciculus → VL of Thalamus) → 4° (Thalamocortical radiations → Supplementary motor area) → 5° (Motor cortex) indirect: 1° (Motor cortex → Striatum) → 2° (GPe) → 3° (Subthalamic fasciculus → Subthalamic nucleus) → 4° (Subthalamic fasciculus → GPi) → 5° (Lenticular fasciculus/Ansa lenticularis → Thalamic fasciculus → VL of Thalamus) → 6° (Thalamocortical radiations → Supplementary motor area) → 7° (Motor cortex) nigrostriatal pathway: Pars compacta → Striatum

Cerebellar

Afferent	Vestibular nucleus → Vestibulocerebellar tract → ICP → Cerebellum → Granule cell Pontine nuclei → Pontocerebellar fibers → MCP → Deep cerebellar nuclei → Granule cell Inferior olivary nucleus → Olivocerebellar tract → ICP → Hemisphere → Purkinje cell → Deep cerebellar nuclei

Efferent	Dentate nucleus in Lateral hemisphere/pontocerebellum → SCP → Dentatothalamic tract → Thalamus (VL) → Motor cortex Interposed nucleus in Intermediate hemisphere/spinocerebellum → SCP → Reticular formation, or → Cerebellothalamic tract → Red nucleus → Thalamus (VL) → Motor cortex Fastigial nucleus in Flocculonodular lobe/vestibulocerebellum → Vestibulocerebellar tract → Vestibular nucleus

Bidirectional: Spinocerebellar	Unconscious proprioception: Golgi tendon organ → ICP/SCP → Spinocerebellar (Dorsal/Posterior thoracic nucleus, Cuneocerebellar) → Cerebellum Reflex arc: Ventral - Rostral

see also white matter fibers

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Dentatothalamic tract

See also

References

External links