Anatomy of the Basal ganglia and cerebellum Flashcards Preview

FBN > Anatomy of the Basal ganglia and cerebellum > Flashcards

Flashcards in Anatomy of the Basal ganglia and cerebellum Deck (22)
Loading flashcards...
1

What does the basal ganglia do

modulates voluntary movement. Acts as a relay system - sends feedback to cortex via thalamus

2

what does the cerebellum do

modulates balance and posture - mostly unconscious

3

name the 4 basic control circuits the basal ganglia is involved in

limbic loop
oculomotor loop
motor loop
cognitive/ prefrontal loop

4

Name the three parts of the striatum

caudate nucleus
putamen
nucleus

5

Describe huntingtons

hyperkinesia, degenerative
ENK neurones knocked out causing less involuntary movement

6

define chorea and dystonia and akinesia

chorea - involuntary movement
dystonia - sustained contractions
akinesia - loss of voluntary movement

7

descrive parkinsons

hyopkinesia, dopamine neurones in the nigrostraital path get knocked out

8

Name the 3 lobes in the cerebellum

anterior, posterior and floccondular lobe

9

Name the 3 tracts the cerebellar outputs to

rubrospinal
reticulospinal
vestibulospinal

10

% of brain vol cerebellum is

10

11

what seperates the ant and post cerebella lobes

1y fissure

12

what connects the cerebella L and R hemispheres

vermis

13

name the three penduncles connecting the cerebellum to the brainstem and what do they connect

superior EFF cerebellum > cerebrum
middle AFF cerebrum > cerebellum
inferior BOTH

14

1. what does the vestibulocerebellum tract do
2. which peduncle does it use

1. receives info from the vestibular nuclei and transmits back (controls vestibulospinal tract)
2. inferior cerebellar peduncle

15

desribe the spinocerebellar tract

vermis to ...
1. fastigial nucleus > reticular formation > reticulospinal tract
2. interposed nucleus > red nucleus > rubrospinal tract

16

what does the spinocerebellar tract do

integrates sensory and motor to produce adaptive motor coordination

17

describe the cerebrocerebellum tract

dentate nuclei (via sup) > ventrolat thalamic nucleus > CORTEX > pontine nuclei > dentate nucleus. cerebellum (via middle cerebellar peduncle)

18

name the three layers of the cerebellar cortex

molecular - purkinje - granular

19

which layers of the cerebellum are input and output

OUTPUT purkinje
INPUT granular

20

describe a climbing fibre
1. where from?
2. where to?

1. FROM inf olive
2. wraps around purkinje cells - 1 per fibre

21

name the two types of cerebella afferent fibres

climbing fibres and mossy fibres

22

mossy fibre ..
1. where from?
2. where to?

1. from pontine and vestibular nuclei
2. innervates 100s of granule cells. granule then climbs to molecular layer and sends out parallel fibres that innervate 100s of purkinje cells