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All efferent tracts originate from the purkinje cells

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All efferent tracts originate from the Purkinje cells.The fibers from these cells terminate in theintracerebellar nuclei (dentate nucleus, nucleus globosus, nucleus emboliformis, nucleus fastigii).Itis only necessary to show thedentate nucleus(in the white matter of the hemispheres), giving rise tothe dentatothalamic tract.Some fibers of the efferent tract do not terminate in the intracerebellarnuclei, but terminate in the vestibular lateral nucleus (Deiters).The rest continue to the nucleus ruberand the thalamus.The superior cerebellar peduncle has one afferent tract called the anteriorspinocerebellar tractand another called the tectocerebellar tractto the tectum of the mesencephalon.TheMIDDLECEREBELLARPEDUNCLEhas the pontocerebellar tractand the reticulocerebellar tract.TheINFERIORCEREBELLARPEDUNCLEhas the posterior spinocerebellar tract, thevestibulocerebellar tract, and the olivocerebellar tract.There are additional tracts with lessimportance: cuneocerebellar and trigeminocerebellar tracts.Its efferent tract is the cerebellovestibulartract.According to the histology of the cerebellum, the termination of these tracts should be known.The olivocerebellar tract is the only tract that terminates byclimbing fiberson the Purkinje cells.Allother tracts terminate bymossy fiberswhich synapse with the granulosa cells.The cerebellum functionally has three main parts: vestibulocerebellum, spinocerebellum,pontocerebellum.The vestibulocerebellar fibers terminate in thevestibulocerebellumwhichinfluences the movements of the vestibular system.We can walk toward something without seeingbecause the vestibular system sends afferents to the vestibulocerebellum, which in turn coordinatesour movements through the vestibular nuclei, and through these nuclei to the vestibulospinal tractand to the fasciculus longitudinalis medialis.The flocculus, pedunculus flocculi, and nodulus belong to the vestibulocerebellum (the oldestpart of the cerebellum is also called the archicerebellum.The anterior lobe, pyramis, uvula, and the connecting part of the hemispheres belong to thespinocerebellum(paleocerebellum).The spinocerebellar tract terminates here.The fibers run out tothe intracerebellar nuclei, and from there to the nucleus ruber and the thalamus, controlling thevoluntary movements through the extrapyramidal tract.Thepontocerebellumis the middle (largest) part of the cerebellum.It is the phylogenicallynewest part (neocerebellum).The pontocerebellar tract terminates in this part as well as thespinocerebellar tract (one of its two terminations).
122EYEEXTRAOCULAR MUSCLESThere are six extraocular muscles plus the levator palpebri superioris.These muscles surroundthe eye, forming something like a cone.The origin of the muscles is theannulus tendineuswhichsurrounds the optic canal.From this tendinous ring, all the muscles arise except the inferior obliquemuscle, which arises from behind the posterior lacrimal spine(posterior border of the lacrimal sac).

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Term
Fall
Professor
NoProfessor
Tags
Muscles of the upper limb, Ulnar nerve, Brachialis Muscle, Arteries of the upper limb

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