Motor Systems (PART 3) Flashcards
The cerebellum receives information from the _______________ systems, the ___________________, and the ________________.
sensory , the spinal cord, and the motor cortex.
What coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity.
cerebellum
CEREBELLAR INPUT 1:
Cortical fibers reach the cerebellum via the ___________.
pons
CEREBELLAR INPUTS 1:
These secondary order neurons extend projections through _________________________.
middle cerebellar peduncle
CEREBELLAR INPUT 2:
Medullary and spinal fibers reach the cerebellum through the ________________.
inferior cerebellar peduncle
Proprioceptive info from spinocerebellar tract go to which cerebellar peduncle?
inferior cerebellar peduncle
Where do signals go when they leave the superior peduncle?
thalamus or red nucleus
Cerebellar outputs stem from the ______________________ and go through the __________________.
deep cerebellar nuclei
superior cerebellar peduncle.
Where do the signals from the dentate nucleus go to?
thalamus
Where do the signals from the interposed nucleus go to?
red nucleus
Where do the signals from the fastigial nucleus go to?
vestibular nuclei and spinal cord
What is the pathway of motor fine tuning by the cerebellum?
Motor cortex -> pons -> contralateral cerebellum ->
dentate nucleus -> thalamus -> motor cortex
What is the pathway of the vestibulocerebellar tract (balance control)?
1.) Vestibular nuclei
2.) cerebellum
3.) fastigial nucleus
4A) thalamus -> motor cortex
4B) vestibular nuclei
What movement disorder involves the degeneration of spinocerebellar fibers. (Contribution of the cerebellum)
Spinocerebellar ataxia
The corticospinal tract goes from __MN to __MN.
Upper MN to Lower MN
