Flashcards in Anatomy of the Basal ganglia and cerebellum Deck (22)
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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
