Pontine nuclei: Definition from Answers.com

Brain: Pontine nuclei
Latin	nuclei pontis
Gray's	subject #187 786
NeuroNames	hier-613

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 via the middle cerebellar peduncle.

They therefore allow modification of actions in the light of their outcome, or error correction, and are hence important in learning motor skills.

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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)

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