Pontocerebellar fibers

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Brain: Pontocerebellar fibers
Scheme showing the connections of the several parts of the brain.
NeuroNames	ancil-408

The pontocerebellar fibers are fibers that run within the middle cerebellar peduncles, from the pons to the cerebellum.

[edit] External links

• http://www.neuroanatomy.wisc.edu/virtualbrain/BrainStem/16Pontine.html
• http://isc.temple.edu/neuroanatomy/lab/atlas/pmjdc/
• http://www.sylvius.com/index/p/pontocerebellar_fibers.html

v • d • e Brain: Metencephalon/rhombencephalon - cerebellum (hindbrain) Regions 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) white: Arbor vitae Vallecula of cerebellum - Primary fissure Layers Molecular layer (Stellate cell, Basket cell) Purkinje cell layer (Purkinje cell) Granule cell layer (Golgi cell, Granule cell) Fibers: Mossy fibers • Climbing fiber • Parallel fiber Deep cerebellar nuclei Dentate - interposed (Emboliform, Globose) - Fastigial 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

v • d • e Brain: rhombencephalon (hindbrain) Metencephalon/ pons Dorsal/ (tegmentum) surface: Locus ceruleus Trigeminal lemniscus (Dorsal trigeminal tract, Ventral trigeminal tract) cranial nuclei: GSA: Principal V/Spinal V - VIII-c (Dorsal, Anterior)/VIII-v (Lateral, Superior, Medial, Inferior) - SVE: Motor V - VII - GSE: VI - GVE: VII: Superior salivary nucleus MLF, III, IV and VI (vestibulo-oculomotor fibers, medial vestibulospinal tract) sensory/ascending: Trapezoid body/VIII - Superior olivary nucleus Inferior cerebellar peduncle (Vestibulocerebellar tract) motor/descending: Apneustic center • Pneumotaxic center (Medial parabrachial nucleus) - Lateral parabrachial nucleus Ventral/ (base) Middle cerebellar peduncles (Pontocerebellar fibers) - Pontine nuclei motor/descending: Corticospinal tract - Corticobulbar tract - Corticopontine fibers Raphe/reticular Reticular formation (Caudal, Oral, Tegmental, Paramedian) • Raphe nuclei (Median) Myelencephalon/ medulla Dorsal surface: Posterior median sulcus - Postero-lateral sulcus - Area postrema cranial nuclei: GVA: VII,IX,X: Solitary/tract • SVA: Gustatory nucleus • GSE: XII  • GVE: IX,X,XI: Ambiguus • SVE: X: Dorsal • IX: Inferior salivatory nucleus - MLF, III, IV and VI sensory/ascending: Gracile nucleus • Cuneate nucleus (Accessory cuneate nucleus) • Sensory decussation  • Medial lemniscus motor/descending: Dorsal respiratory group Ventral motor/descending: Ventral respiratory group - Pyramid (Motor decussation) - Inferior olivary nucleus (Olivocerebellar tract, Rubro-olivary tract) surface: Anterior median fissure - Antero-lateral sulcus - Arcuate nucleus of medulla - Olivary body Raphe/reticular Reticular formation (Gigantocellular, Parvocellular, Ventral, Lateral, Paramedian) • Raphe nuclei (Obscurus, Magnus, Pallidus)

v • d • e Brain and spinal cord: neural tracts and fasciculi Sensory/ascending: PCML Pacinian corpuscle/Meissner's corpuscle → PCML → arcuate fibers (Posterior external arcuate fibers, Internal arcuate fibers) - Medial lemniscus → Thalamus → Postcentral gyrus Sensory/ascending: anterolateral system Free nerve ending → Spinothalamic tract (Lateral, Anterior) → Spinal lemniscus → Postcentral gyrus Spinoreticular tract → Reticular formation Spinotectal tract → Midbrain tectum Motor/descending: pyramidal and extrapyramidal flexion: Primary motor cortex → Posterior limb of internal capsule → Decussation of the pyramids → Corticospinal tract (Lateral, Anterior) → Neuromuscular junction flexion: Red nucleus → Rubrospinal tract extension: Vestibulocerebellum → Vestibular nuclei → Vestibulospinal tract extension: Vestibulocerebellum → Reticular formation → Reticulospinal tract Midbrain tectum → Tectospinal tract → muscles of neck Bidirectional: Spinocerebellar Unconscious proprioception: Golgi tendon organ → Spinocerebellar (Dorsal/Dorsal nucleus of Clarke/Column of Clarke, Cuneocerebellar) → Cerebellum Reflex arc: Ventral - Rostral Brain only Medial longitudinal fasciculus Vestibular nucleus → Vestibulocerebellar tract → Cerebellum Pontine nuclei → Pontocerebellar fibers → Deep cerebellar nuclei Inferior olivary nucleus → Olivocerebellar tract → Cerebellar hemisphere Primary motor cortex → Genu of internal capsule → Corticobulbar tract → brainstem see also white matter fibers