cerebellum 3 Flashcards
Vestibulocerebellum:
anatomical region
Flocculonodular
Lobe
Vestibulocerebellum: principle input
vestibular sensory cells
Vestibulocerebellum: deep nucleus
vestibular
Vestibulocerebellum: principal destination
axial motoneurons
Vestibulocerebellum: function
- axial control
- vestibular reflex
- balance
- eye movement
Spinocerebellum
vermis: anatomical region
vermis
Spinocerebellum
vermis: principal input
- visual
- auditory
- vestibular
- somatosensory
Spinocerebellum
vermis: deep nucleus
fastigial
Spinocerebellum
vermis: principle nucleus
medial systems
Spinocerebellum
vermis: function
- axial motor control
- posture
- locomotion
- gaze
Spinocerebellum
paravermal: principle input
spinal afferents
Spinocerebellum
paravermal: deep nucleus
interposed
Spinocerebellum
paravermal: principal destination
- lateral system
2. red nucleus
Spinocerebellum
paravermal: function
distal motor control
cerebrocerebellum: anatomical region
lateral hemisphere
beyond paravermal
cerebrocerebellum: principal input
cortical afferents
cerebrocerebellum: deep nucleus
dentate
cerebrocerebellum: principal distination
integration areas
cerebrocerebellum: function
- initiation
- planning
- timing
The normal operation of the cerebellum is to
direct planned motor outputs in accordance with expectation (planned in the inferior olive) and actual motor performance (spinal afferents arriving in cerebellum as mossy fibers).
motor learning mechanism
- inferior olive detects a discrepancy between the planned movement and actual motor performance
- it generates APs in the climbing fibers creating an error signal at the Purkinje cell.
- The signals from the climbing fiber in COMBINATION with signals from the mossy fiber depolarizations
- result in a weakening of the synapses responsible for those movements.
