THE CONDUCTIVE TRACTS THE WHITE MATTER OF THE

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THE CONDUCTIVE TRACTS

THE CONDUCTIVE TRACTS

THE WHITE MATTER OF THE HEMISPHERES • The white matter occupies the whole space

THE WHITE MATTER OF THE HEMISPHERES • The white matter occupies the whole space between the grey matter of the cerebral cortex and the basal ganglia. It consist of a great number of nerve fibres stretching in different directions and forming the conduction pathways of the telencephalon.

The following three systems of nerve fibres are distinguished: • the association fibres connect

The following three systems of nerve fibres are distinguished: • the association fibres connect different cortical areas • • of one hemisphere. Short and long fibres are distinguished; the commissural fibres, components of the cerebral commissures, connect symetrical parts of both hemispheres; the projection fibres connect the cerebral cortex partly with the thalamus and the geniculate bodies and partly with the distally located parts of the nervous system, the spinal cord among others. Some of these fibres conduct stimuli centripetally, i. e. toward the cortex. , other, on the contrary, centrifugally.

The conductive tract of temperature and pain sense – lateral spino-thalamical tract • The

The conductive tract of temperature and pain sense – lateral spino-thalamical tract • The receptor is situated in • • • the skin first neuron (pseudounipolar cells) is in spinal ganglion the second neuron is in the nucleus proprius of the posterior horns third neurons are in the dorsal lateral nucleus of the thalamus

Conductive tract of touch and pressure sensitivity – anterior spino-thalamical tract • The receptor

Conductive tract of touch and pressure sensitivity – anterior spino-thalamical tract • The receptor is situated in the • • • skin first neuron (pseudounipolar cells) is in spinal ganglion second neurons are located in the substantia gelatinosa of the posterior horn of the spinal cord the third neurons cells are situated in the dorsal latersl nucleus of the thalamus

The conductive tract of proprioceptic sensitivity of cortical direction – tractus bulbothalamicus • Receptor

The conductive tract of proprioceptic sensitivity of cortical direction – tractus bulbothalamicus • Receptor are situeted in • • • the muscles, tendons, joint capsules and ligaments first neurons are in the spinal ganglions second neurons are in the nucleus gracilis and nucleus cuneatus the third neurons cells are in the dorsal lateral nucleus of the thalamus

The conductive tracts of proprioceptic sensitivity of cerebellum direction The dorsal spinocerebellar tract or

The conductive tracts of proprioceptic sensitivity of cerebellum direction The dorsal spinocerebellar tract or Flexig ۥ s fascicle • first neurons are in the spinal ganglion • second neurons are in the thoracic nucleus (Clarke ۥ s column) • the third neurons cells are vermis cortex

The anterior spinocerebellar tract or Gower ۥ s tract • first neurons are in

The anterior spinocerebellar tract or Gower ۥ s tract • first neurons are in • • spinal ganglions second neurons are in the nucleus intermedius medialis third neurons are In the cortex of vermis

Corticonuclear tract • first neurons are in • giant pyramidal cells (Bets’s cells) second

Corticonuclear tract • first neurons are in • giant pyramidal cells (Bets’s cells) second neurons are in motor nucleusees of the IX, X, XII cranial nerves of the opposite side

Lateral and anterior corticospinal tracts • first neurons are in • giant pyramidal cells

Lateral and anterior corticospinal tracts • first neurons are in • giant pyramidal cells of higher two thirds of the precentral gyrus second neurons are in motor nucleuses of the anterior horn

Rubrospinal tract (Monakov’s) • first neurons are in • the red nucleus second neurons

Rubrospinal tract (Monakov’s) • first neurons are in • the red nucleus second neurons are in motor neurons of the anterior horns

The corticopontinocerebellar tract • the first neurons • are in the cerebral cortex the

The corticopontinocerebellar tract • the first neurons • are in the cerebral cortex the second neurons are nuclei proprii pontis

TRACTS DR SHUBHANGI SAXENA TRACTS Ascending tracts WhichTRACTS DR SHUBHANGI SAXENA TRACTS Ascending tracts Which
MATTER MATTER Matter MATTER What is matter MatterMATTER MATTER Matter MATTER What is matter Matter
Extrapyramidal Tracts Extra Pyramidal Tracts Include all motorExtrapyramidal Tracts Extra Pyramidal Tracts Include all motor
THE DESCENDING MOTOR TRACTS The descending tracts mayTHE DESCENDING MOTOR TRACTS The descending tracts may
Spinal cord ascending tracts Naming the tracts IfSpinal cord ascending tracts Naming the tracts If
Circulatory System Conductive Pathway Conductive Pathway Electrical impulsesCirculatory System Conductive Pathway Conductive Pathway Electrical impulses
Hybrid Visualization for White Matter Tracts using TriangleHybrid Visualization for White Matter Tracts using Triangle
Some Terminologies White matter myelinated fibre tracts GraySome Terminologies White matter myelinated fibre tracts Gray
Hybrid Visualization for White Matter Tracts using TriangleHybrid Visualization for White Matter Tracts using Triangle
Descending Tracts INTRODUCTION white matter of the spinalDescending Tracts INTRODUCTION white matter of the spinal
Telencephalon White matter Basal ganglia Telencephalic white matterTelencephalon White matter Basal ganglia Telencephalic white matter
WHITE MATTER OF CEREBRUM White matter is aWHITE MATTER OF CEREBRUM White matter is a
White matter White matter refers to areas ofWhite matter White matter refers to areas of
Telencephalon White matter Basal ganglia Telencephalic white matterTelencephalon White matter Basal ganglia Telencephalic white matter