cerebellum and structure and functions Flashcards
basic cerebellum info
- cerebral cortex above it; pons of the brainstem in front of it
- has a R and L hemisphere
- has gray and white matter
- vermis= midline
main job of the cerebellum
to coordinate, regulate, synergize movement
- also has jobs of regulating emotion and cognition
- DOES NOT initiate movement
specific jobs of the cerebellum
- provide for organized, coordinated voluntary movements
- regulate postural stability during movement
- corrdinate, modify, fix rapid, sequential, ONGOING movement
- is provided with input from various places, about the state of ongoing movement, and FIXES any problems
- learn new/novel patterns
cerebellum non-motor functions
-regulator of:
emotional behavior, language output/organizational/ grammatical efforts
of executive function efforts
of visou-spatial cognition
cerebellar cognitive affective syndrome
difficultly regulating emotional output, difficulty scanning for information
cerebellum lobes
-anterior, posterior, flocculonodular
anterior lobe of the cerebellum
- receives proprioceptive input from the spinal cord
- sensori-motor feedback
- motor editing corrects posture
posterior lobe of the cerebellum
- receives motor input from the cerebrum
- regulates movement
- regulates emotional and cognitive movement
flocculonodular lobe of the cerebellum
- sends vestibular input to the brainstem
- maintains equilibrium
where does the cerebellum attach?
to the brainstem at the level of the pons
cerebellar penducles
- attaches cerebellum to the brainstem
- comprised of white matter
- trasport messages IN and OUT of the cerebellum
- heading to the thalamus, to limbic, to cerebral cortex, etc
- receiving info from the cortex, thalamus, limbic, spinal cord, brainstem
- afferent and efferent
superior cerebellar peduncle
OUTGOING ONLY
- sends editorial messages to the thalamus
- which conveys them to the motor cortex and SC
- in order to mediate/ fix ongoing movement
middle cerebellar peduncle
INCOMING
- receives incoming info from the temporal and frontal lobes via the brainstem
- relays ongoing updates on status of motor movements between cerebral hemispheres (motor and sensory updates)
- the largest of the 3; largest number of connection fibers
inferior cerebellar penduncles
INCOMING
-receives proprioceptive info about movement, from SC, brainstem
pathologies/lesions of the cerebellum
- disrupt ability to correct or synergize movements in progress
- disrupt ability to smoothly execute or emotional “movement”
- results in poor coordination, difficulty controlling volitional postures
