Movement 2 Flashcards
Cerebellum is the brain region that is responsible for…
- Basic coordination of limbs
- Eye movement
- Balance
- Muscle tone
Three functional components of the cerebellum
- Vermis & Anterior Lobe
- Posterior Lobe
- Flocculonodular lobe
Major inputs of signal into the cerebellum are from the ____ and ____ ____, which relay in ____ ____
Motor; promotor cortex; pontine nuclei
3 Layers of cerebellar cortex
- Molecular layer
- Purkinje cell layer
- Granular layer
The molecular layer of the cerebellar cortex includes…
Dendrites of purkinje cells; interneurons
Purkinje cells have their dendrites in…
(They receive more ____ ____ than any other neuron)
—>molecular layer
(Synaptic inputs)
Granule cells are located in the ____ ____, and they have very ____ dendrites. They also respond to the neurotransmitter____, which has an excitatory effect on the cell
Granule layer; short (or few); glutamate
Parallel fibers are…
Granule cell axons that project to the molecular layer; they split into two branches running in opposite directions
2 external inputs to the cerebellar cortex are ___ and ____, both are ___rgic
Climbing fibers; Mossy fibers; Glutamate
Climbing fibers
- From Inferior Olive (brainstem)
- Synapse on Purkinje cell dendrites (contact ~1–10 of them)
Mossy fibers
- From Pontine nuclei (brainstem)
- Full pathway: “corticopontocerebellar”
(Cerebral cortex —> pontine nucleus —> cerebellum)
Primary output from the cerebellar cortex is done by ____ cells
Purkinje
Anatomical loop of the brain
- Cerebral cortex
- Pontine nucleus
- Cerebellum
- Deep cerebellar nuclei
- Thalamus
- Back to the top
Cerebellum damage can lead to the inability to ____ movement accordingly to ____ ____
Adjust; Sensory information
Common behavioral traits following cerebellum damage
- Balance/gait
- Guided movements
- Error in range and force of movement
- Inability to rapidly stop the limb
