Brainstem I: Pons and Cerebellum Flashcards Preview

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Flashcards in Brainstem I: Pons and Cerebellum Deck (26):
1

Where can cerebellar damage cause abnormalities?

PRETTY MUCH IN THE MOVEMENT OF ANY BODY PART. Balance, coordination, VESTIBULAR FUNCTION...

linked to headaches, nausea, vomiting, unsteadiness, slurred speach, ATAXIAAAAAA

2

Functions involving cerebellum

motor coordinaiton, motor learning, balance, posture, proprioception...seat of all MOTOR activity in brain

PREDICTION

3

Other functions besides motor that cerebellum affects?

BP, breating rhythm, cognition (esp emotion), language (controversial, autism)

PREDICTION

4

Where is more than half the neurons in brain?

CEREBELLUM

5

Floculo-nodular lobe function

aka vestibulocerebellum. MOSTLY vestibular function

6

Anterior lobe function

aka spinocerebellum. receives input from every part of spinal cord, regulation of muscle tone, coordination of skilled voluntary movement. LIMBS

7

posterior lobe function

AKA CEREBROCEREBELLUM. planning of voluntary activity

8

4 pairs of nuclei surronded by cerebellar cortex

Fastigial, globose, emboliform, dentate

Fat Guys Eat Donuts

they are the main output of cerebellum...connect to the rest of brain and spinal cord via peduncles

9

3 cerebellar peduncles

superior (SCP) - connects cerebellum with midbrain, OUTPUT from cerebellum

middle (MCP) - connects cerebellum with pons (INPUT) into cerebellum

inferior (ICP) - connects cerebellum with medulla oblongata (BOTH)

10

What can we call the "trees" of the cerebellum?

Arbor vitae

11

3 layers of the cerebellar gray matter?

MPG

molecular, purkinje cell layer, granular layer

12

Five major cell types of neurons in cerebellum?

purkinje, golgi, stellate, basket, granule

13

Two types of afferent (inputs)

mossy fibers, climbing fibers

14

One type of efferent (output)

purkinje cell axons

15

How excitable are Purkinje cells?

Very active, SPONTANEOUSLY ACTIVE

16

Purkinje cells: inhibitory or excitatory?

INHIBITORY (GABAergic)

17

Which cells are the main site of cerebellar computation of the cerebellum?

Purkinje cells

18

What is the most numerous cell type in the brain?

Granule cells, excitatory!!!, relay mossy fibers info to purkinje cells

19

Which cells give spatial control to Purkinje cells?

basket and stellate cells

20

What do Golgi cells do to cerebellum?

temporal inhibition of mossy fiber input

21

What are the 3 major input sources to cerebellum?

spinal cord - related to position.condition of muscles, tendons, oints

vestibular system - balance

cerebral cortex - planning, initiation of movement

22

Where does fastigial nucleus project to?

Bilaterally to vestibular nuclei and

23

Where does interposed nucleus project to?

Contralateral to red nucleus

24

Where does dentate nucleus project to?

Contralateral to thalamus

25

Functions of pons

Sleep, arousal, autonomic functions (e.g. respiration), ajor link between cerebral and cerebellum

26

Two principle regions of pons?

1. basis pontis - ventral (contains CST, CBT, pontine nuclei

2. pontine tegmentum - dorsal (contains crainal nerve nuclei, reticular formation, respiratory centers

contains CN V, VI, VII, VIII