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Anatomy > Cerebellum > Flashcards

Cerebellum Flashcards

1
Q

What are the important functions of cerebellum?

A

Maintaining tone, posture, and equilibrium

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2
Q

Cerebellum controls same side of body or opposite side?

A

Same side of body

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3
Q

What are functions of cerebellum wrt movements?

A

Contributes to coordination, precision and accurate
timing.

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4
Q

What is arbor vitae?

A

The grey matter is highly folded in cerebellum to accommodate
millions of neurons in a small area and the arrangement
is called ‘arbor vitae’

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5
Q

Cerebellum is located in which fossa?

A

Posterior cranial fosaa

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6
Q

What is median vermis?

A

The cerebellum consists of 2 cerebellar hemisphere which are connected to each other through median vermis.

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7
Q

What is vallecula?

A

It is a deep median notch on inferior surface which separates right and left cerebellar hemisphere .

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8
Q

The anterior and posterior notch on cerebellum lodges…

A

Anterior notch lodge medulla and pons.
Posterior notch lodges falx cerebelli

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9
Q

Each hemisphere is divided into how many lobes?

A

3 lobes

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10
Q

Name 3 lobes of hemisphere

A

Anterior lobe
Posterior lobe
Floculonodular lobe

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11
Q

Horizontal fissure separates

A

Superior surface from inferior surface of cerebellum

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12
Q

Primary fissure or fissura prima separates

A

Anterior lobe from middle lobe on superior surface

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13
Q

Posterolateral fissure separates

A

Middle lobe from floculonodular lobe on inferior surface.

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14
Q

On basis of morphological divisions cerebellum is divided into

A

Archicerebellum
Paleocerebellum
Neocerebellum

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15
Q

What is main function of archicerebellum?

A

controls the axial musculature and the bilateral
movements used for locomotion and maintenance
of equilibrium

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16
Q

What is main function of paleocerebellum ?

A

controls tone, posture and crude movements of the
limbs.

17
Q

What is function of neocerebellum?

A

Involved in regulation of fine movements of body

18
Q

Cerebellum is divided into how many longitudinal zones?

A
  1. Lateral , Intermediate and vermis
19
Q

Lateral zone involved in planning, programming and coordination is done through which tract?

A

dentato-rubro-thalamo-cortical tract, descending
corticospinal tracts

20
Q

What is the function of intermediate zone through rubrospinal tract?

A

Concerned with control of muscles of distal parts of
limbs like hands and feet.

21
Q

Median zone or vermis which controls muscles of trunk , neck , shoulder and hips is through which tracts?

A

Vestibulospinal and
Reticulospinal tracts.

22
Q

What is function of floculonodular lobe?

A

Functions with vestibular
system in controlling equilibrium.

23
Q

What is peduncle?

A

The fibres entering or leaving the cerebellum are
grouped to form peduncles.

24
Q

What is primarily function of peduncle?

A

It helps to connect cerebellum to midbrain, pons and medulla.

25
Q

Which peduncles are afferent and efferent?

A

Superior cerebellar peduncle is efferent.
Middle and inferior cerebellar peduncle are afferent to cerebellum.

26
Q

What is gray matter of cerebellum?

A

Gray matter of cerebellum consists of cerebellar cortex and cerebellar nuclei.

27
Q

Name four pairs of nuclei in gray matter of cerebellum.

A

1 Nucleus dentatus is neocerebellar.
2 Nucleus globosus
3 Nucleus emboliformis is paleocerebellar.
4 Nucleus fastigii is archicerebellar

28
Q

What is arterial blood supply of cerebellum?

A

2 superior cerebellar arteries and 2 anterior inferior cerebellar arteries which are branch of basilar artery.
Posterior inferior cerebellar artery which is branch of vertebral artery.

29
Q

What is functional difference between cerebrum and cerebellum?

A

Cerebrum controls opposite side of body
Cerebellum controls same side of body (ipsilateral).

30
Q

Vermis lesions on cerebellum leads to

A

Truncal ataxia
Inability of person to maintain balance and coordination while standing or sitting.

31
Q

Nystagmus which occurs due to lost connection of

A

Vermis to labrynth connection is lost resulting in rapid and jerky movement of eyes.

32
Q

What anterior lobe lesion results in

A

It results in gait ataxia in which person can’t walk in straight line. It occurs due to incoordination in lower limbs.

33
Q

What does neocerebellar lesions results in?

A

Causes incoordination of movements of upper limb resulting in tremer and overshoot movements. Speech is also defective

34
Q

What is cerebellum cognitive affective syndrome?

A

Thrombosis of one of six arteries supplying cerebellum causes this syndrome.

Anatomy (6 decks)

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