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  1. World Encyclopedia
  2. Lenticular fasciculus
Lenticular fasciculus
From Wikipedia, the free encyclopedia
Tract of the nervous system
Lenticular fasciculus
The image shows dopaminergic pathways of the human brain in normal condition (left) and Parkinsons Disease (right). Red Arrows indicate suppression of the target, blue arrows indicate stimulation of target structure. (Lenticular fasciculus visible but not labeled, as red line from GPi to THA.)
Details
Identifiers
Latinfasciculus lenticularis
NeuroNames441
NeuroLex IDnlx_66287
TA98A14.1.08.664
A14.1.09.521
TA25752
FMA61976
Anatomical terms of neuroanatomy
[edit on Wikidata]

The lenticular fasciculus is a tract connecting the globus pallidus (internus) to the thalamus and is a part of the thalamic fasciculus. It is synonymous with field H2 of Forel. The thalamic fasciculus (composed of both the lenticular fasciculus and ansa lenticularis) runs to the thalamus. It is part of a pathway connecting the globus pallidus and the thalamus.

Lesions in this area can result in dyskinesias such as chorea-like movements.

External links

[edit]
  • https://web.archive.org/web/20070419222336/http://www.endotext.org/neuroendo/neuroendo3b/neuroendo3b_2.htm (see figure #12)
  • https://web.archive.org/web/20080504234454/http://isc.temple.edu/neuroanatomy/lab/atlas/mdbg/
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Anatomy of the diencephalon of the human 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
  • Median eminence/Tuber cinereum
  • Mammillary body
  • Infundibulum
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
    • Stria terminalis
    • Medial forebrain bundle
    • Retinohypothalamic tract
  • efferent
    • Mammillothalamic tract
    • Dorsal longitudinal fasciculus
Pituitary
  • Posterior is diencephalon, but anterior is glandular
Subthalamus
  • Subthalamic nucleus
  • Zona incerta
  • Nuclei campi perizonalis (Fields of Forel)
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Rostral basal ganglia of the human 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
    • Anterior limb
    • Genu
    • Posterior limb
    • Optic radiation
  • Corona radiata
  • External capsule
  • Extreme capsule
  • Pallidothalamic tracts: Thalamic fasciculus
    • Ansa lenticularis
    • Lenticular fasciculus
  • Subthalamic fasciculus
Rhinencephalon
Grey matter
  • Anterior olfactory nucleus
  • Anterior perforated substance
  • Olfactory bulb
White matter
  • Olfactory tract
    • Medial olfactory stria
    • Lateral olfactory stria
  • Olfactory trigone
Other basal 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
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Brain and spinal cord: neural tracts and fasciculi
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 and Anterior Spinothalamic tract → Spinal lemniscus → VPL of Thalamus) → 3° (Postcentral gyrus) → 4° (Posterior parietal cortex)

2° (Spinomesencephalic 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
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 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 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 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 Edit this at Wikidata
  • Terminologia Anatomica
    • 2
Retrieved from "https://en.wikipedia.org/w/index.php?title=Lenticular_fasciculus&oldid=1261781314"
Categories:
  • Brainstem
  • Thalamus
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