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(Index , Outline )
The pontine nuclei are a part of the pons which store the memory of intention during motor activity. Corticopontine fibres carry information from the primary motor cortex to the ipsilateral pontine nucleus in the ventral pons, and the pontocerebellar projection then carries that information to the contralateral cerebellum.
They therefore allow modification of actions in the light of their outcome, or error correction, and are hence important in learning motor programs .
External links [ ]
Brain : rhombencephalon (hindbrain)
Metencephalon /pons
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
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 )
