Friday 1 - Ruff - Motor control - cerebellum

Question 1

function of the vermis of the cerebellum

Answer 1

midline movements

speech
posture
stance
gait
visceral function

Question 2

function of the paravermis of the cerebellum

Answer 2

appendicular (limb) movements

reaching
grasping

Question 3

function of the lateral hemispheres of the cerebellum

Answer 3

extensive reciprocal cortex

complex movements and cognition

Question 4

Deep cerebellar nuclei

Answer 4

Dont Eat Green Frogs

from lateral to medial

dentate
emboliform
globus
fastigial

Question 5

nuclei the vermis projects to

Answer 5

fastigial

Question 6

nucleus the paravermis projects to

Answer 6

interposed

emboliform and globus

Question 7

nucleus that the lateral hemispheres of the cerebellum project to

Answer 7

dentate

Question 8

Granule cells send the projection from the ____ layer to the ____ layer

Answer 8

from granule layer

through the purkinje layer

to the molecular layer where they connect with the many dendrites of the purkinje cell

Question 9

“Basic circuit” of the cerebellum

Answer 9

granule cell in the granule layer goes through purkinje layer to molecular layer and synapses on purkinje cell dendrites

purkinje cell “large tail” goes back to granular cell layer to INHIBIT deep cerebellar nucleii

Question 10

what cells make up the output of the cerebellum

Answer 10

Deep cerebellar nucleii

Question 11

Mossy fibers general

Answer 11

Input into cerebellum is more than output

excites deep cerebellar nuclei and granule cells

come from spinocerebellum and vestibulocerebellum, and cerebrocerebellum (last one via pontine nuclei)

Question 12

with regards to mossy fibers

inferior cerebellar peduncles

Answer 12

recieve ipsilateral input from the dorsal and rostral spinocerebellar tracts (rostral tract never crosses over) and cuneocerebellar tract

Question 13

with regards to mossy fibers

middle cerebellar peduncles

Answer 13

recieve contralateral input from pontine nuclei

Question 14

with regards to mossy fibers

superior cerebellar peduncles

Answer 14

mostly output

input from the ventral spinocerebellar tract (this is the tract that crosses the midline twice

Question 15

Climbing fibers

originate

where does it enter the cerebellum

where do they go in the cerebellum

Answer 15

originate in the contralateral inferior olive

inferior cerebellar peduncle

go to purkinje cells - each purkinje cell only gets one climbing fiber. used to detect errors in motions

Question 16

Where in the spine do cells from the paravermis go?

Answer 16

lateral corticospinal tract

(this is for reaching and grasping)

Also

magnocellular red nucleus of the rubrospinal tract

Question 17

Where in the spine do cells from the vermis of the cerebellum go?

Answer 17

Ventral corticospinal tract (midline functions, like posture, orienting, and gait)

Question 18

biggest defect seen in a defect in the vermis

Answer 18

gait ataxia

Question 19

Defects in cerebrocerebellum (aka lateral hemisphere)

Answer 19

loss of fine motor control

impairments in highly skilled motions (speech, sports, etc.)