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Subthalamic fasciculus

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Bi-directional nerve tract

Subthalamic fasciculus
DA-loops inParkinson's disease (Subthalamic fasciculus visible but not labeled.)
Details
Identifiers
Latin	fasciculus subthalamicus
NeuroNames	2280
TA98	A14.1.08.677 A14.1.09.522
TA2	5755
FMA	77525
Anatomical terms of neuroanatomy [edit on Wikidata]

Thesubthalamic fasciculus is a bi-directionalnerve tract that interconnects thelateral globus pallidus andsubthalamic nucleus as part of theindirect pathway. The pallidal efferents areGABAergic, but also containenkephalin. Its fibers interweave perpendicularly among the fibers of theinternal capsule.^[1]

References

[edit]

^Standring, Susan (2020).Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York:Elsevier. pp. 501, 508.ISBN 978-0-7020-7707-4.OCLC 1201341621.

External links

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Anatomy of thediencephalon of thehuman brain

Epithalamus

Surface	Pineal gland Habenula Habenular trigone Habenular commissure
Grey matter	Pretectal area Habenular nuclei Subcommissural organ

Thalamus

Surface	Stria medullaris Thalamic reticular nucleus Taenia thalami
Grey matter/ nuclei	paired:AN Ventral VA/VL VP/VPM/VPL Lateral LD LP Pulvinar nuclei Metathalamus MG LG P cell M cell K cell midline:MD Intralaminar Centromedian Midline nuclear group Interthalamic adhesion
White matter	Mammillothalamic tract Pallidothalamic tracts Ansa lenticularis Lenticular fasciculus Thalamic fasciculus DCML Medial lemniscus Trigeminal lemniscus Spinothalamic tract Lateral lemniscus Dentatothalamic tract Acoustic radiation Optic radiation Subthalamic fasciculus Ventral trigeminal tract Medullary laminae

Hypothalamus

Surface

Grey matter

Autonomic zones	Anterior (parasympathetic/heat loss) Posterior (sympathetic/heat conservation)
Endocrine	posterior pituitary:Paraventricular Magnocellular neurosecretory cell Parvocellular neurosecretory cell Supraoptic oxytocin/vasopressin other:Arcuate (dopamine/GHRH) Preoptic (GnRH) Suprachiasmatic (melatonin)
Emotion	Lateral Ventromedial Dorsomedial

White matter

afferent
efferent
- Mammillothalamic tract
- Dorsal longitudinal fasciculus

Pituitary

Posterior is diencephalon, butanterior is glandular

Subthalamus

Rostralbasal ganglia of thehuman brain and associated structures

Basal ganglia

Grey matter

Striatum	Dorsal striatum Putamen Caudate nucleus Ventral striatum Nucleus accumbens Olfactory tubercle Globus pallidus GPe GPi
Other	Amygdala Claustrum

White matter

Centrum semiovale

Internal capsule

Corona radiata

Rhinencephalon

Grey matter	Anterior olfactory nucleus Anterior perforated substance Olfactory bulb
White matter	Olfactory tract Medial olfactory stria Lateral olfactory stria Olfactory trigone

Otherbasal forebrain

Grey matter	Substantia innominata Nucleus basalis Nucleus of diagonal band
White matter	Diagonal band of Broca Stria terminalis

Archicortex:
Hippocampal formation/
Hippocampus anatomy

Grey matter	Hippocampus CA1 CA2 CA3 CA4 Dentate gyrus Fascia dentata Subiculum
White matter	Alveus Fimbria Perforant path Schaffer collateral

Brain andspinal cord:neural tracts andfasciculi

Sensory

DCML

1°:	Pacinian corpuscle/Meissner's corpuscle →Posterior column (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 andAnterior Spinothalamic tract →Spinal lemniscus →VPL ofThalamus) → 3° (Postcentral gyrus) → 4° (Posterior parietal cortex) 2° (Spinomesencephalic tract →Superior colliculus ofMidbrain tectum)
Slow/medial	1° (Group C nerve fiber →Spinoreticular tract →Reticular formation) → 2° (MD ofThalamus) → 3° (Cingulate cortex)

Motor

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 ofThalamus) → 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 ofThalamus) → 6° (Thalamocortical radiations →Supplementary motor area) → 7° (Motor cortex)
nigrostriatal pathway:	Pars compacta →Striatum

Cerebellar

Afferent

Vestibular nuclei →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 inLateral hemisphere/pontocerebellum →SCP →Dentatothalamic tract →Thalamus (VL) →Motor cortex

Interposed nucleus inIntermediate hemisphere/spinocerebellum →SCP →Reticular formation, or →Cerebellothalamic tract →Red nucleus →Thalamus (VL) →Motor cortex

Fastigial nucleus inFlocculonodular lobe/vestibulocerebellum →Vestibulocerebellar tract →Vestibular nuclei

Bidirectional:
Spinocerebellar

Unconscious proprioception	lower limb → 1° (muscle spindles →DRG) → 2° (Posterior thoracic nucleus →Dorsal/posterior spinocerebellar tract →ICP →Cerebellar vermis) upper limb → 1° (muscle spindles →DRG) → 2° (Accessory cuneate nucleus →Cuneocerebellar tract →ICP →Anterior lobe of cerebellum)
Reflex arc	lower limb → 1° (Golgi tendon organ) → 2° (Ventral/anterior spinocerebellar tract→SCP →Cerebellar vermis) upper limb → 1° (Golgi tendon organ) → 2° (Rostral spinocerebellar tract →ICP →Cerebellum)

Authority control databases	Terminologia Anatomica 2

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