from Pons —> through Middle peduncles
from Medulla —> through Inferior peduncles
CERULEO-cerebellar
PONTO-cerebellar
Preprogram fine motor movements – UE
Regulates activities from cortex to cerebellum
Nuclei: Pontine Nuclei (pons)
Nuclei: Locus coeruleus (midbrain)
Course: Middle peduncles
Course: Superior peduncles
Neurotransmitter: Glutamate
Neurotransmitter: Noradrenalin
RETICULO-cerebellar
Update motor info by integrating
visual and vestibular circuit
RAPHE-cerebellar
Modulates neuronal activities throughout brainstem and in the cerebellum.
Nuclei: Reticular formation
(pons and medulla)
Nuclei: Raphe nuclei
(pons and medulla)
Course: Middle and Inferior
peduncles
Course: Middle and inferior peduncles
Neurotransmitter: Enkephalin
Neurotransmitter: Serotonin
OLIVO-cerebellar
HYPOTHALAMO-cerebellar
Mediates spinal reflexes and
cortical impulses
Function obscured for now
Nuclei: Olivary nuclei
(medulla)
Nuclei in hypothalamus
Course: Superior peduncles
Course: Inferior peduncle
Neurotransmitter: Histamine
Neurotransmitter: Aspartate,
Corticotropin
2. Fiber:
mossy - all of them except—> climbing - OLIVOcerebellar
General Rules
1.
Peduncles:
from Midbrain —> through Superior peduncles
3.
All tracts end up in cerebellar cortex and nuclei
SPINOCEREBELLAR TRACTS - ASCENDING TRACTS
TRACTS
ORIGIN
COURSE
Ends
Function
DECUSSATION
NEUROTRANSMITTER
Dorsal/Posterior
Spinocerebellar
Tract (PSCT)
L3
Lamina VIINucleus of
Clarke
*Inferior Cerebellar Peduncle
Cerebellar:
1. cortex
2. nuclei
(collateral
axons)
Unconscious proprioceptive input
from GTO and muscle spindles
(tone and length) of LE
NO
Glutamate (+)
Cuneocerebellar
(analogous tract to PSCT)
C8-C1
Cuneate
fasciculus
*synapsing at the Accessory (lateral)
cuneate nucleus at the medulla
* Inferior Cerebellar Peduncle
“
Unconscious proprioceptive input
from GTO and muscle spindles of
UE
NO
“
Ventral/Anterior
Spinocerebellar Tract
(ASCT)
S2
Lamina VII
Intermediate
Zone
*travels ipsilateral and
contralateral *enters the cerebellum via
Superior Cerebellar Peduncle.
BILATERAL PROJECTIONS to each
cerebellar hemispheres
“
Unconscious proprioceptive input
from GTO- LEs
At the spinal
level
“
Rostral Spinocerebellar
Tract (analogous tract to
ASCT)
C8-C4
Lamina VII
Intermediate
Zone
*Inferior Cerebellar Peduncle
*Superior Cerebellar Peduncle
IPSILATERAL HEMISPHERE
“
(only anterior
lobe cortex)
Unconscious proprioceptive input
from GTO- UEs
No
“