Cerebellum

Question 1

What structure separates cerebellar lobes into anterior and posterior lobes?

Answer 1

Primary fissure of cerebellum

Question 2

What lobes are the cerebellum separated into?

Answer 2

Anterior lobe and posterior lobe

Question 3

Function of flocculonodular lobe?

Answer 3

Area is primarily responsible for balance and ocular movements.

Question 4

Describe the vestibulo-ocular reflex.

Answer 4

The reflex that functions to stabilize the image on the retina during head movement by causing the eyes to move in the opposite direction of the head.

Question 5

What can result from lesions in the floccularnodular lobe?

Answer 5

• Multiple deficits in visual tracking and oculomotor control (nystagmus and vertigo)
• Deficits in integration of vestibular information for eye and head control
• Deficits in control of axial muscles for balance

Question 6

What would you diagnose if a patient presented with involuntary, rapid, repetitive eye movements bilaterally?

Answer 6

Nystagmus

Question 7

What are cerebellar tonsils?

Answer 7

Ovoid structures on the inferomedial surface of EACH cerebellar hemisphere

Question 8

What is the name of the leaf-life gyri of the cerebellar cortex?

Answer 8

Folia

Question 9

What structure separates the two cerebellar hemispheres to left and right portions?

Answer 9

Vermis

Question 10

Function of vermis?

Answer 10

1. Help with posture
2. limb movement
3. eye movement

Question 11

What structure lies just lateral to the vermis bilaterally?

Answer 11

Paravermis

Question 12

What connects the cerebellum to the midbrain?

Answer 12

Superior cerebellar peduncle

Question 13

True or False:

SCP forms the lateral portion roof of the 4th ventricle

Answer 13

True, they enter the brain stem just below the inferior colliculi

Question 14

Is the SCP carrying afferent or efferent fibers?

Answer 14

Efferent fibers AND afferent (proprioception of lower body)

SCP is an output route from cerebellum to upper motor neuron in precentral gyrus

Question 15

What structure connects the cerebellum to the pons?

Answer 15

Middle cerebellar peduncles

Question 16

What type of information if traveling through the MCP?

Answer 16

Strictly afferent fibers traveling from pons to cerebellum

Question 17

True or False:

The MCP is the smallest of the peduncles.

Answer 17

False; it is the largest peduncle

Question 18

What important pathway involves the MCP?

Answer 18

Corticopontacerebellar pathway

Question 19

Where do the MCP fibers originate?

Answer 19

In the pontine nucleus, which then sweep anteriorly across the midline of the pons (pontocerebellar fibers) and project posteriorly through the MCP to terminate in the cortex of the cerebellum and vermis (minus lingula and FNL)

Question 20

What structure connects the cerebellum to the medulla oblongata?

Answer 20

Inferior cerebellar peduncles

Question 21

What type of information if traveling through the ICP?

Answer 21

Afferent fibers from olives

Question 22

What is the name of the thin layer of tissue suspended between the superior cerebellar peduncles that forms the roof of the fourth ventricle?

Answer 22

Superior medullary velum

Question 23

Superior medullary velum is enclosed by ________ mater dorsally and ________ ventrally.

Answer 23

• pia

- emendyma

Question 24

In the cerebellum, where is proprioception received?

Answer 24

paleocerebellum/spinocerebellum

Question 25

In the cerebellum, where are balance and reflexes controlled?

Answer 25

Archecerebellum/Vestibulocerebellum

Specifically in the floccularnodular lobe (FNL)

Question 26

If there is injury to the cerebellum, will we see contralateral or ipsilateral effects?

Answer 26

Ipsilateral

Question 27

Cerebellum receives input from what three places?

Answer 27

1. Inner ear
2. Proprioceptors
3. Cerebral cortex