Flashcards in Cerebellum Deck (14)
The sober "little brain"
Primary function to evaluate how well movements initiated by the cerebrum are carried out (coordination of skilled movements).
Feedback signals correct errors, smooth movements, coordinate complex motor sequences.
10% of brain mass, over half of the neurons
What separates the cerebellum from the cerebrum?
The "worm" portion of the cerebellar butterfly
Lobes of the cerebellulm
Anterior lobe of the cerebellum
Involved in unconscious proprioception (spinothalamic tract)
Posterior lobe of the cerebellum
Involved in the fine tuning of movement associated with subconscious movement.
Involved in equilibrium and balance (specifically with eyes)
Bulk of cerebellar mass
Grey matter in a series of parallel folds (folia)
Layers of the cerebelllum
Cerebellar cortex (grey matter)
Arbor vitae (white matter)
Cerebellar nuclei (grey matter that give rise to axons carrying impulses from the cerebellum to the other brain centres)
Bundles of white matter that attach cerebellum to brain stem
3 pairs: superior, middle and inferior
Connect cerebellum to red nuclei (midbrain) and thalamus
Axons carry impulses for voluntary movements from pontine nuclei (which received input from motor cortex) into cerebellum
1. spinocerebellar (from proprioceptors of limbs and trunk)
2. from vestibular apparatus of inner ear and vestibular nuclei of medulla and pons(from sensory receptors of head)
3. from inferior olivary nucleus (regular cerebellar neurons)
4. cerebellum to vestibular nuclei of medulla and pons
5. cerebellum to reticular formation